Residential Solar Installation Company: Buyer Checklist

A residential solar installation company will work on your roof, electrical service, consumer account, and long-term home records. Choose it through measured evidence, not a brand promise.

Start with the project route. Then give at least 3 qualified bidders the same survey brief and request for quotation. Keep homeowner accounts and approvals under your control.

This is a procurement framework, not project engineering, legal advice, or an approval promise. Use qualified structural, electrical, roof, safety, tax, finance, and legal reviewers for the actual home.

Choose the Correct Residential Solar Route

Do not ask for a subsidy quote before identifying the consumer, connection, ownership, system, and official route.

PM Surya Ghar residential CFA route

The June 2024 operational guidelines cover a capex CFA component for eligible residential consumers. They include National Portal, registered-vendor, equipment, installation, DISCOM inspection, metering, and claim processes.

Read the June 2024 residential CFA guidelines with the 7 July 2025 amendment and later current material.

The homeowner should confirm eligibility, application date, prior capacity, prior CFA, consumer category, vendor route, and current documents. Software or installer language does not determine entitlement.

Unsubsidised grid-connected residential route

A homeowner can pursue a grid-connected project without assuming central CFA. Current State, regulator, DISCOM, connection, metering, equipment, and safety rules still matter.

Do not copy the subsidised quote and simply remove one line. Equipment, documents, payment timing, portal tasks, and commercial structure may differ.

Give It Up or no-CFA route

Record the homeowner’s decision and the official process used. Confirm current equipment and portal treatment instead of inferring an exemption.

A no-CFA decision does not remove electrical safety, roof, contract, warranty, or utility duties.

Off-grid and hybrid home systems

An off-grid or hybrid system needs a different operating brief. Define outage loads, battery energy and power, inverter modes, isolation, generator interface, transfer, ventilation, protection, and service.

Do not promise grid export, CFA, backup duration, or universal switchover behaviour. Verify the exact equipment combination and current authority route.

Group housing and RWA projects

Common facilities, household allocations, association approvals, roof rights, common meters, fire access, and service governance create a separate project.

A single flat owner should not sign for association assets without proper authority. Obtain the governing resolutions and current route.

Commercial or mixed-use connections

The cited residential CFA component does not carry into a commercial or industrial consumer quote. Mixed-use facts need authority confirmation.

Use the PM Surya Ghar installation guide for scheme steps. This article owns installer selection and delivery controls.

Keep the Homeowner in Control

The consumer should retain the official account, registered contact details, bank data, approvals, and records.

Keep control of:

• National Portal account
• Registered mobile number and email
• Password, OTP, and recovery method
• Consumer account number
• Bank account and beneficiary details
• Application and feasibility decisions
• Equipment and installation records
• Invoices, tax documents, and receipts
• Inspection and meter records
• CFA or no-CFA status
• Complaints and service history

An installer may assist through authorised steps. Assistance should not become ownership of the consumer identity.

Never share a blank signed form, unrestricted OTP access, email password, banking password, card PIN, or remote-device control. Verify each request in the official workflow.

When an OTP arrives, read the transaction details yourself. Approve only the intended step. Record the date, screen, reference, and person assisting.

Use a homeowner-controlled email folder and cloud or local archive. Give the installer only the minimum information required for the task.

If the vendor creates a profile or document, require a copy and transfer of control immediately. Test password recovery before final payment.

Verify the Legal Entity and Payee

The trading name on a van can differ from the contracting entity. Reconcile the complete identity.

Request:

• Legal entity name
• Constitution, such as company, LLP, partnership, or proprietorship
• Registered and operating address
• Company or LLP identifier where applicable
• GSTIN and current status where applicable
• Authorized signatory and authority
• Quotation, contract, invoice, and receipt names
• Bank-account name and branch details
• Current insurance evidence requested for the work
• Complaint and legal-notice address

Use the current MCA Company or LLP master-data service for applicable entities. The GST taxpayer-search guide explains official registration lookup.

Registry or tax presence does not prove project quality. It helps verify identity and status within the field shown.

Do not pay a personal or mismatched account without a documented lawful explanation approved by your advisers. Confirm bank changes through a known contact, not only the change message.

Test the invoice trail with a small contractual milestone before a large payment. Ensure receipt, payee, invoice, and project reference reconcile.

Verify the Current Vendor Route

For the cited PM Surya Ghar CFA route, the operational guidelines describe consumer choice of a vendor registered on the National Portal.

Use the National Portal and current State or DISCOM path. Check the exact legal entity, registration level, geography, and status at the time required.

Do not rely on:

• A screenshot without a date
• A similarly named entity
• An old certificate
• A salesperson’s personal registration
• Another State’s record
• A marketplace badge
• A prior customer’s route

Vendor registration is a threshold, not a rank. It does not prove roof engineering, workmanship, price, equipment, service capacity, safety, references, warranty response, or fit.

For unsubsidised or other routes, determine which contractor, electrical, local, building, society, or utility requirements apply. Do not assume the PM Surya Ghar record replaces them.

The vendor-near-me guide can help build a local shortlist. Verify each candidate again for the actual address.

Write the Homeowner Project Brief

Give every bidder the same starting facts. Do not let each sales team define a different project.

Include:

• Property address and ownership or consent
• Consumer category and DISCOM
• Connection number, tariff category, sanctioned load, phase, and meter
• At least 12 months of available bills
• Planned loads and occupancy changes
• Daytime and evening use
• Outage frequency and critical loads
• Desired grid-connected, hybrid, or off-grid behaviour
• Existing generator, inverter, battery, or solar
• Roof type, age, leaks, repairs, and access
• Renovation, extension, or reroofing plan
• Budget and financing constraints
• Applicable portal or no-CFA route
• Target decision and construction windows

Separate fact, owner statement, installer measurement, authority record, and assumption. Each has a different reliability level.

Do not size the system from one bill total alone. Tariffs, fixed charges, seasonal use, sanctioned load, roof constraints, export treatment, and future loads matter.

For outage needs, list each critical load, starting demand, operating power, daily energy, and required duration. The grid-connected solar array alone may not supply loads during an outage.

Use the home solar cost guide to identify cost categories. Ask bidders for current project evidence rather than copying guide figures.

Require a Measured Roof Survey

A satellite image is useful for preparation. It does not replace a safe measured site survey.

The survey report should identify who visited, date, tools, weather, access limits, photographs, measurements, assumptions, and open actions.

Geometry and usable area

Measure roof edges, slopes, levels, parapets, tanks, rooms, vents, pipes, antennas, equipment, setbacks, paths, and obstructions.

Show the usable module area and maintenance access. Do not fill every visible patch if cleaning, drainage, fire access, roof repair, or safe movement becomes impossible.

Record measurement tolerance. Confirm whether dimensions came from tape, laser, drawings, drone, imagery, or estimate.

Roof covering and condition

Identify RCC, tile, metal sheet, membrane, or other assembly. Record age, visible defects, corrosion, cracks, loose areas, prior penetrations, and repairs.

A solar installer should not declare a roof sound without appropriate competence and evidence. Route concerns to a qualified structural or roof professional.

Plan for the roof’s remaining service life. Removing and reinstalling solar during reroofing creates cost and risk that belongs in the contract.

Framing and structure

Record available structural drawings, member types, sizes, spans, spacing, supports, roof buildup, existing loads, and uncertain conditions.

The qualified designer should assess project loads, attachment, uplift, movement, corrosion, and applicable requirements. Do not accept a generic structural letter detached from the measured home.

The installer should identify who owns structural design, calculations, field verification, approval, and changes.

Waterproofing and penetrations

Map existing waterproofing, warranties, leaks, drains, joints, flashings, and proposed penetrations.

Request the attachment and sealing method, compatible materials, surface preparation, inspection, cure conditions, tests, photographs, and repair responsibility.

Ask whether solar work affects an existing roof warranty. Obtain the roof provider’s written position where relevant.

No installer can guarantee a leak-free outcome without defined scope and conditions. The contract should allocate investigation and repair duties.

Drainage and water paths

Map drains, scuppers, valleys, gutters, slopes, ponding, overflow paths, and cleaning runoff. Keep supports, cables, and debris away from drainage routes.

Check whether raised items create traps. Require a post-installation drainage inspection before final acceptance.

Shade and horizon

Record trees, tanks, parapets, neighbouring structures, wires, roof rooms, and future construction. Use a dated shade method and show the analyzed period.

Separate current measured shade from future assumptions. Define who may trim vegetation and whether permission exists.

Use shadow analysis for a reproducible design study. Its result still depends on accurate geometry and assumptions.

Access and safety interfaces

Plan delivery, ladders, scaffolds, lifting, edge protection, fragile surfaces, occupied areas, children, pets, neighbours, and emergency access.

Identify working hours, housekeeping, temporary protection, weather stops, and daily isolation. These controls belong in the site plan and contract.

Survey the Electrical Service

The installer should document the existing service rather than infer it from the bill.

Record:

• Supply voltage and phase
• Service rating and sanctioned load
• Meter type, identifier, and location
• Main protective device
• Distribution-board make, rating, condition, and spare capacity
• Bus, conductor, and termination information
• Existing earthing system and test points
• Available cable routes
• Existing generator, UPS, inverter, battery, or solar
• Accessible isolation locations
• Flood, heat, dust, ventilation, and fire conditions

Photograph labels safely. Do not open energized equipment without authorized qualified personnel and safe procedure.

Flag old, damaged, undersized, unlabelled, or inaccessible equipment. State whether correction is included or excluded.

The home may need work beyond the solar system. Separate necessary service changes from optional improvements.

Require an Exact Technical Design

The proposal should name products and show how they work together.

Modules

Record manufacturer, complete model, wattage, quantity, rated module DC total, dimensions, technology, connector, warranty documents, and current authority evidence.

Do not accept only a brand, wattage class, or phrase such as Tier 1. These do not identify the delivered product.

MNRE’s ALMM index showed a List-I update dated 3 August 2026 when checked. Verify the exact model, applicable list, cell requirement, project route, and later changes.

Inverter and battery

Record complete inverter model, rated power, phase, MPPT and input limits, output, protection, communication, environment, firmware, warranty, and service route.

For a battery, add model, usable-energy basis, continuous and surge power, voltage, BMS, communication, operating limits, location, ventilation, protection, emergency procedure, and warranty conditions.

Do not assume an inverter and battery work together because their brands are familiar. Obtain exact manufacturer approval for the combination.

Racking and attachment

Record material, coating, rail and clamp models, fasteners, attachment, spacing, roof interface, corrosion environment, earthing or bonding provisions, and structural basis.

Identify any ballast, penetrations, adhesives, chemical anchors, or waterproofing work. State inspection and cure requirements.

Product registration evidence

The BIS Scheme II page provides the official category route. Verify the exact product, model, applicable standard, registration scope, status, and date.

A registration for one model does not cover every product family automatically. Keep evidence in the handover file.

Review Strings, Conductors, and Protection

The design should include a current single-line diagram and string schedule.

Check:

• Modules per string
• String count per MPPT
• Temperature-adjusted voltage basis
• Operating-current basis
• Inverter input and output compatibility
• DC and AC conductor types and sizes
• Route, length, support, segregation, and protection
• Connector types and mating rules
• DC and AC isolation
• Overcurrent protection where required
• Surge protection
• Earthing and bonding
• Labels and emergency shutdown information
• Interface with meter, main panel, and utility

The CEA safety regulations, 2023 include solar protection, isolation, earthing, and testing context. Qualified professionals must determine the current project application and amendments.

Do not accept a drawing copied from another home. The meter, phase, panel, cable route, roof, and equipment should match the project.

Use the single-line diagram guide for drawing review. Local authority and engineering requirements remain controlling.

Define Monitoring Ownership

Monitoring is part of handover, not a sales demonstration.

The homeowner should receive:

• Primary account ownership
• Registered homeowner email and phone
• Administrator and installer role definition
• Device and plant identifiers
• Data interval and history
• Alarm and notification setup
• Firmware and connectivity responsibility
• Export method
• Privacy information
• Account recovery procedure
• Transfer or deletion process

Do not leave the system under an employee’s personal account. Do not depend on the installer’s phone for all alerts.

Test loss of internet, router replacement, phone replacement, password recovery, and installer access removal.

Monitoring is not revenue-grade proof unless the exact meter and process establish it. Compare inverter, generation-meter, net-meter, and bill data carefully.

Issue One RFQ to at Least 3 Bidders

A common request for quotation, or RFQ, creates comparable bids.

Include:

• Homeowner brief and project route
• Survey requirements and access rules
• Required design deliverables
• Exact equipment schedule
• Authority and application responsibilities
• Civil, roof, waterproofing, and electrical scope
• Installation method and safety plan
• Inspection and test plan
• Monitoring and training
• Handover file
• CMC and warranty matrix
• Local service and escalation
• Itemised pricing format
• Assumptions and exclusions register
• Schedule dependencies
• Substitution and change-order process
• Payment evidence milestones
• Required references and insurance evidence

Allow each bidder to propose an alternative, but require a conforming base bid first. Label every deviation.

The installer should visit the home before a final fixed scope. If access is incomplete, the quote should show provisional items and a resolution gate.

Normalize the 3 Proposals

Do not compare only system kW and total price.

Normalize units and quantities. One bidder may include a cable route, roof repair, application fee, monitoring device, or scaffold that another excludes.

Mark included, excluded, allowance, provisional, owner supply, or unknown for each line.

Unknown is not zero. Resolve material unknowns before award.

Audit Generation and Bill Assumptions

The installer may provide a generation or savings model. Treat it as an estimate.

Require:

• Weather-data source and period
• Measured roof geometry and orientation
• Shade input
• Module and inverter model
• DC and AC capacity
• Loss assumptions
• Degradation assumption
• Availability and outage assumptions
• Self-consumption method
• Export and tariff source
• Fixed and variable charge treatment
• Tax and escalation assumptions
• Existing bill period
• Future load changes
• Financing assumptions
• Model version and preparer

Do not guarantee generation, bill reduction, savings, payback, export credit, tariff, or loan outcome.

Compare the estimate with the homeowner’s own 12-month load pattern. A high annual total may still have low daytime self-use.

Keep CFA and State support separate from energy savings. Neither is an installer discount unless the contract explicitly funds it.

Use solar design software to create consistent technical and financial inputs. Qualified review and current authority evidence still apply.

Itemise Price, Fees, and Exclusions

Request quantities, rates, taxes, and totals for:

• Modules
• Inverter
• Battery and backup equipment
• Racking and attachments
• DC cables and connectors
• AC cables and switchgear
• Isolators and protective devices
• Earthing and bonding
• Monitoring and communication
• Civil and structural work
• Roof preparation and waterproofing
• Scaffolding, lifting, and access
• Labour and supervision
• Transport, freight, and unloading
• Design and calculations
• Applications, inspections, and meter work
• Testing, commissioning, and training
• CMC and service
• Optional items

State taxes separately and obtain qualified tax review. Do not infer a rate from a web article.

List exclusions in plain language. Common ambiguity includes roof repair, service upgrade, meter, application fee, internet, tree work, trenching, painting, crane, scaffold, civil restoration, battery enclosure, and travel.

The delivered total should include every confirmed item needed for the contracted acceptance condition. Keep unresolved authority charges visible.

Control Equipment Substitutions

Do not allow equivalent or better without a defined approval process.

The substitution request should include:

• Original and proposed complete model
• Reason
• Price effect
• Schedule effect
• Capacity and layout effect
• String and electrical effect
• Structural and attachment effect
• Authority and registration evidence
• Warranty and service effect
• Monitoring and compatibility effect
• Updated drawings and calculations
• Homeowner and professional approvals

No delivery should equal automatic acceptance. Inspect labels and serials before installation.

If the exact model becomes unavailable, the homeowner may approve, reject, renegotiate, or terminate under the signed contract. Define those rights before payment.

Update the portal, authority, quote, drawings, warranty, and handover records when required.

Write a Contract That Matches the Bid

Attach the final RFQ, proposal, design, equipment schedule, responsibility matrix, exclusions, programme, and payment milestones.

The contract should identify:

• Parties and authorized signatories
• Home and consumer connection
• Project route and no-guarantee caveats
• Scope and deliverables
• Exact equipment and substitutions
• Survey facts and assumptions
• Design responsibility
• Authority and application responsibility
• Site access and safety
• Schedule dependencies and weather
• Price, tax, fees, and allowances
• Payment evidence
• Change orders
• Inspection and acceptance
• Damage, roof, and restoration duties
• Insurance evidence
• CMC and separate warranties
• Local service and escalation
• Suspension, termination, and remedies
• Records, privacy, monitoring, and account control
• End-of-life and removal responsibility
• Dispute and notice process

Do not rely on a sales message that is absent from the contract. Resolve conflicts between quotation, brochure, portal statement, and terms.

Use qualified counsel for the actual agreement. Consumer rights and remedies depend on facts and applicable law.

Tie Payments to Objective Evidence

Avoid payment milestones based only on dates or vague progress.

Possible evidence gates include:

1. Signed contract, verified identity, approved design, and current route evidence
2. Exact equipment delivered, inspected, and recorded by serial
3. Mounting and roof work accepted at the defined hold point
4. Electrical installation complete with inspection records
5. Commissioning tests passed and defects logged
6. Monitoring transferred and homeowner trained
7. Authority, meter, or portal milestone where the contract makes it applicable
8. Corrected handover file, warranties, and service contacts accepted

The percentage or amount at each gate should reflect project risk and local law. This article does not prescribe one payment schedule.

Keep a final retention or milestone where lawful and agreed. Define release evidence and a deadline for correcting defects.

Pay only against the contracted entity or approved documented payee. Obtain invoice and receipt with project reference.

Never treat an estimated CFA as cash already paid. Define who carries timing risk and how any finance account is handled.

Require Written Change Orders

A change order should state requestor, reason, scope, drawings, equipment, price, tax, schedule, approvals, warranty effect, and payment.

Do not let verbal field instructions change a roof penetration, conductor, protection device, array layout, or battery location.

Emergency safety action may occur first. Record the permanent resolution and authority review afterward.

Keep a change log with old and new values. Update as-built records and serial lists.

If a hidden condition appears, document photographs and measurement before covering it. Apply the contract’s investigation and pricing route.

Hold a Pre-Start Meeting

The homeowner, project manager, site lead, electrician, roof or structural reviewer, and other required parties should review the current issue.

Confirm:

• Approved work area and access
• Occupied-home protection
• Children, pets, neighbours, and parking
• Working hours and noise
• Delivery, lifting, scaffold, and storage
• Weather stops
• Electrical isolation and outage notice
• Roof protection and drainage
• Fire and emergency contacts
• Daily housekeeping
• Photograph and data consent
• Current drawings and open actions
• Inspection hold points
• Damage reporting

Mark fragile or restricted areas. Protect belongings and finishes before material movement.

Do not begin structural or electrical work with unresolved critical design questions.

Inspect Equipment at Delivery

Match every delivered item with the approved schedule.

Record:

• Manufacturer and complete model
• Quantity
• Serial number where applicable
• Rating label
• Packaging and visible condition
• Registration or list evidence where applicable
• Warranty document
• Storage condition
• Delivery date and carrier damage

Quarantine mismatched or damaged items. Do not install first and resolve later.

Store modules, inverter, battery, cables, and electronics under manufacturer requirements. Prevent water, impact, heat, and unauthorized access.

The homeowner does not need to sign a clean delivery receipt for hidden damage. Follow the carrier and contract process.

Use Installation Hold Points

Hold points let the right reviewer see work before it becomes hidden.

Before roof attachment

Verify layout, measured structure, attachment locations, waterproof detail, materials, tools, weather, and access.

After first attachment

Inspect drilling, embedment, sealing, torque or installation method, coating damage, alignment, and photograph standard.

Before modules cover the roof

Inspect rails, clamps, fasteners, bonding, cable support, connector management, roof clearance, drainage, and access.

Before electrical energization

Inspect diagram, conductor route, terminations, polarity, isolation, protection, earthing, labels, enclosure, clearances, and configuration.

Before handover

Complete tests, monitoring, training, defects, cleaning, records, serials, and warranty registration.

Define who can release each hold point. A salesperson’s message should not replace the qualified acceptance record.

Audit Workmanship During Installation

Use photographs and checklists, but do not substitute them for competent supervision.

Review:

• Correct attachment positions
• Fastener installation and tool settings
• Cut-edge and corrosion treatment
• Module clamp zones
• Rail alignment and thermal movement
• Cable support and bend radius
• Connector mating and protection
• Separation from sharp edges and hot surfaces
• Drainage and roof cleanliness
• Enclosure location and sealing
• Conductor identification
• Earthing and bonding continuity
• Warning and circuit labels
• Fire and maintenance access
• Damage to roof, walls, paint, and finishes

Photograph concealed work with location reference. Store originals with time and issue number.

Stop affected work after a material deviation. Obtain the designer’s written resolution before proceeding.

Define Inspection and Commissioning Tests

The qualified team should produce a project-specific inspection and test plan. Current manufacturer, CEA, DISCOM, standard, and professional requirements control.

The plan may address:

• Visual inspection
• Equipment and serial verification
• Mechanical attachment inspection
• Torque records where specified
• Polarity
• Continuity and protective-conductor checks
• Earthing measurements
• Insulation resistance under safe procedure
• Open-circuit voltage and string comparison
• Operating current comparison
• Protective-device and isolator operation
• Inverter configuration
• Anti-islanding or grid-interface tests where required
• Battery and backup functional tests
• Emergency shutdown
• Meter and monitoring comparison
• Alarm and communication tests
• Roof and drainage inspection

Do not perform a test without competent personnel, correct instruments, isolation, and safety procedure.

Record instrument identifier, calibration status, method, acceptance limit, measured result, tester, date, weather, and corrective action.

A green inverter screen is not a commissioning record.

Test the Actual Home Operating Modes

Run the contracted modes safely.

For a grid-connected system, confirm normal start, shutdown, grid-loss response, restart, monitoring, alarms, and meter observation under the approved procedure.

For backup, test only the approved critical-load arrangement. Confirm transfer, isolation, load limits, battery behaviour, alarms, restart, and generator interaction where applicable.

Do not create an outage test that risks occupants or equipment. Plan medical, security, pump, refrigeration, and communication loads.

Record which loads were tested and their conditions. Do not extrapolate one light-load test to every home load.

The homeowner should demonstrate the shutdown and recovery steps during training.

Complete the Handover File

Final payment should not precede a corrected, indexed handover pack when the contract ties payment to it.

Include:

• Contract and approved change orders
• Final invoice and receipts
• Application and authority records
• Approved and as-built drawings
• String schedule and single-line diagram
• Structural and roof records
• Equipment datasheets
• Complete model and serial register
• Registration and list evidence where applicable
• Inspection and test results
• Instrument records
• Photographs of concealed work
• Monitoring ownership and recovery
• Configuration and firmware record
• Homeowner training record
• Emergency shutdown instructions
• CMC schedule
• OEM warranties and registrations
• Workmanship, structure, roof, and monitoring warranties
• Service contacts and escalation
• Spare parts, keys, labels, and manuals
• Maintenance and cleaning plan
• End-of-life and removal responsibilities

Mark draft, superseded, and final files. Use the project address and issue date.

Store copies in at least 2 homeowner-controlled locations. Avoid a file link that expires after the final payment.

Separate CMC and Every Warranty

The June 2024 guidelines state that registered vendors provide repair and maintenance services free for 5 years of the CMC period for the cited scheme route. They also address component correction and OEM warranties.

That framework does not make all warranty duties identical.

Ask who diagnoses a fault when responsibility is disputed. Define investigation cost and reimbursement after cause is found.

Warranty length alone is a poor comparison. Review remedy, exclusions, evidence, transfer, labour, travel, freight, removal, reinstallation, response path, and provider continuity.

Build the 5-Year Service Calendar

The actual CMC tasks and frequency should come from applicable guidelines, contract, manufacturers, site conditions, and qualified review.

The calendar may include:

• Visual roof and mounting inspection
• Drainage and debris check
• Cable and connector inspection
• Enclosure, label, and isolator inspection
• Earthing and protection checks
• Inverter and battery alarm review
• Monitoring and communication check
• Generation and bill trend review
• Cleaning assessment
• Vegetation and shade review
• Firmware or configuration review under control
• Warranty and service-record update

Do not perform unsafe roof access or live electrical work as homeowner maintenance.

Record date, technician, observations, readings, photographs, actions, parts, open defects, and next due date.

Compare actual trends with weather, outages, shade, cleaning, equipment, and tariff changes. Do not promise a particular output from one month’s data.

Verify Local Service Before Award

A national phone number is not the same as local field capacity.

Ask:

• Which office covers the address?
• Who receives faults?
• Which technician can attend?
• What hours and holidays apply?
• How is an emergency classified?
• What remote diagnosis occurs first?
• Which travel and visit charges apply?
• Which spare parts are local?
• How are OEM cases managed?
• Who owns unresolved tickets?
• What happens if the original installer exits the area?

Obtain 3 relevant references where practical. Seek similar roof, equipment, route, and geography.

Ask references about survey changes, roof care, documentation, payment disputes, faults, response, and warranty labour. A reference supplied by the bidder is not independent proof.

Use one service scenario during bid interviews. Example: the inverter reports an isolation fault after rain, and monitoring is offline.

Ask who makes the site safe, who attends, who investigates the roof and electrical causes, which costs apply, and how escalation works.

Create an Escalation Ladder

The homeowner should not search for contacts during a fault.

Suggested sequence:

1. Follow the documented emergency or shutdown procedure.
2. Contact the installer’s assigned service channel.
3. Record ticket, time, symptoms, alarms, photographs, and safety condition.
4. Escalate to service manager and contract contact.
5. Contact the relevant OEM for a component case.
6. Contact the DISCOM for grid, meter, connection, or safety matters when appropriate.
7. Notify insurer, roof party, finance provider, or authority when the issue requires it.
8. Use formal notice, mediation, consumer, regulator, or legal routes as applicable.

Call emergency services or the relevant emergency authority for immediate danger. Do not wait for a routine ticket.

The National Consumer Helpline is one Government of India grievance channel. It does not replace police, cybercrime, electrical emergency, DISCOM, regulator, insurer, or court processes.

Preserve the contract, payments, communications, photos, tests, monitoring data, and service log. Do not alter failed equipment before evidence is recorded, unless safety requires action.

Plan for Home Sale and End of Life

Ask whether accounts, warranties, CMC, portal records, and monitoring can transfer to a new owner. Define documents and fees.

Plan for module, inverter, battery, cable, and racking removal or replacement. Identify ownership, safe isolation, roof restoration, transport, data deletion, and lawful waste route.

Do not assume the original installer will operate decades later. Preserve technical records that another qualified provider can use.

For batteries and electronics, obtain the current manufacturer and legal end-of-life route at the time of removal. Do not store damaged equipment in occupied areas.

Budget future removal and roof work in the homeowner’s lifecycle plan. The initial purchase price does not include an unquoted future service.

Apply Identical Gates to Heaven Green Energy

SurgePV and Heaven Green Energy have common ownership. This related-party connection requires disclosure.

Do not repeat its published rank, project, savings, geography, status, timeline, or result claims without current independent evidence for the exact claim.

Heaven Green receives no automatic shortlist position or score. Choose another qualified installer when its verified offer fits the home better.

Score Only After Mandatory Gates Pass

Use pass or fail gates first:

• Correct consumer and project route
• Verified legal entity and payee
• Current required vendor or contractor record
• Measured roof and electrical survey
• Qualified structure, roof, and electrical responsibilities
• Exact equipment and current evidence
• Itemised delivered scope and exclusions
• Controlled substitutions and changes
• Objective payment milestones
• Installation inspection and test plan
• Complete handover
• CMC, warranty, and local service routes

Reject or hold a bid that fails a mandatory gate. Do not compensate with a lower price or longer marketing warranty.

After all gates pass, weight:

• Design clarity
• Survey completeness
• Risk allocation
• Delivered price
• Schedule credibility
• Homeowner effort
• Reference evidence
• Service accessibility
• Contract acceptance
• Lifecycle and exit readiness

Keep the scoring sheet with the decision. Record why the selected installer won and which risks remain.

Interview Each Residential Solar Installation Company

A structured interview can reveal gaps hidden inside a polished proposal. Ask the same questions in the same order and record each answer.

Start with the survey. Ask who measured the roof, who checked the electrical service, and which facts still need specialist review. Request the marked survey record, not a verbal summary.

Ask the designer to explain the drawing. They should identify module zones, setbacks, attachments, cable routes, inverter location, isolation, protection, earthing, and monitoring. Record every unresolved assumption.

Then test project-route knowledge. Give the bidder the actual consumer category, State, DISCOM, connection, and CFA decision. Ask for the current official source behind each required step.

Do not accept a generic portal screenshot as proof. The evidence should match the consumer, address, capacity, application date, equipment, and route.

Use these delivery questions:

• Which legal entity signs the contract and receives payment?
• Which named person owns survey, design, installation, testing, and service?
• Which work is subcontracted?
• Which qualifications, licences, and insurance apply to that work?
• Which roof and electrical risks remain open?
• Which exact models are priced?
• Which items may change before delivery?
• Which evidence closes each payment milestone?
• Which defects block commissioning or final acceptance?
• Which local team handles a fault after handover?

Ask the bidder to walk through 3 failure scenarios. Use a roof leak, an inverter fault, and a delayed authority step. The answer should identify safety action, investigation owner, cost allocation, notice, evidence, escalation, and remedy.

Request project records from a comparable completed home with personal data removed. Look for coherent drawings, serials, tests, photographs, warranties, and handover indexing. A brochure does not show record quality.

Reference calls need specific questions. Confirm what changed after survey, whether substitutions occurred, how defects were closed, and whether service visits produced written records.

Check the named service contact during the selection period. Send a documented technical question and observe routing, ownership, clarity, and closure. This is only a small service test, not proof of future performance.

End with a deviation review. Read every exception, provisional sum, customer duty, excluded fee, schedule dependency, and warranty condition aloud. Transfer agreed answers into the contract before signing.

Do not score confident speech. Score dated records, measured facts, controlled responsibilities, and testable commitments.

Final Homeowner Checklist

Before award:

• Confirm the consumer, connection, ownership, and project route.
• Keep portal, contact, OTP, bank, and records under homeowner control.
• Verify legal name, tax record, payee, signatory, and route status.
• Give at least 3 bidders the same measured RFQ.
• Resolve roof, shade, structure, waterproofing, drainage, and access.
• Resolve service, meter, panel, phase, cable route, earthing, and protection.
• Freeze complete equipment models and substitution controls.
• Normalize price, tax, fees, exclusions, schedule, CMC, warranties, and service.
• Tie payments to objective evidence.
• Sign the design, contract, responsibility, and change process.

Before final acceptance:

• Match delivered models and serials.
• Complete roof, mechanical, electrical, and safety hold points.
• Pass documented commissioning tests.
• Transfer monitoring control.
• Train the homeowner on shutdown, alarms, and service.
• Correct defects.
• Accept the indexed handover file.
• Confirm CMC, warranties, local contacts, and escalation.

Use the residential solar design guide for design scope. Request a SurgePV demo when your team needs a controlled survey-to-design workflow.

Conclusion

The right residential solar installation company is the one that can turn your measured home into a controlled design, contract, installation, and service record.

Keep your identity and approvals. Compare 3 normalized bids. Pay against evidence. Separate every warranty, and prove the local service route before award.

Frequently Asked Questions

How do I choose a residential solar installation company?

Give at least 3 qualified bidders the same measured RFQ. Compare legal identity, current route, roof and electrical design, exact equipment, exclusions, payments, tests, handover, separate warranties, references, and local service.

Should a solar company control my subsidy account and OTP?

No. Keep the registered phone, email, credentials, OTP, bank data, approvals, invoices, receipts, and claim records under homeowner control. Authorise limited vendor assistance only through the current official workflow.

Does PM Surya Ghar vendor registration prove installer quality?

No. Current registration is a threshold for the cited CFA route. It does not prove roof design, electrical work, equipment, price, service, safety, references, warranty response, or fit for your home.

What should a residential solar roof survey include?

Require measured geometry, covering, condition, framing, tanks, parapets, drainage, waterproofing, shade, access, cable route, inverter location, meter, service, phase, panels, earthing, protection, photographs, and open assumptions.

How should I compare residential solar quotations?

Normalize exact models, quantities, design, labour, freight, roof work, applications, meters, taxes, exclusions, schedule, substitutions, and monitoring. Compare tests, warranties, CMC, local service, and total delivered price.

When should I make the final solar payment?

Tie payment to objective evidence in the signed contract. Keep a lawful agreed final milestone for corrected tests, monitoring access, training, serials, warranties, approvals where applicable, and the complete handover file.

Are the 5-year CMC and equipment warranties the same?

No. The cited PM Surya Ghar guidelines describe a 5-year registered-vendor CMC duty. OEM product or performance, workmanship, roof, structure, monitoring, and service obligations need separate written terms.

What should I do when the home solar system develops a fault?

Follow the documented emergency procedure and record the condition. Contact the assigned service route, preserve evidence, follow escalation times, and involve the DISCOM or emergency authority when appropriate.

Is Heaven Green Energy automatically the recommended installer?

No. SurgePV and Heaven Green Energy have a related-party relationship. Verify Heaven Green and every alternative through identical legal, route, survey, design, equipment, contract, payment, installation, warranty, reference, and service gates.