TANESCO is Tanzania’s national electricity utility, operating the grid that serves over 5.7 million customers. For solar developers, TANESCO is both the gatekeeper and the offtaker: every grid-connected solar system must receive TANESCO interconnection approval, and every SPP must sell power to TANESCO under the Standardized Power Purchase Agreement. Understanding TANESCO’s processes, standards, and timelines is essential for any solar project in Tanzania.
This guide covers the TANESCO grid connection process in detail: the SPP framework, the Standardized PPA, net metering rules, technical interconnection standards, EWURA licensing thresholds, and the tax exemptions that reduce project costs.
Do Not Energise Without TANESCO Written Approval
Connecting a grid-tied solar system to the TANESCO network without written interconnection approval violates the Electricity Act 2008. TANESCO can disconnect the premises without notice and may impose penalties. Always obtain the energisation approval letter before switching the system on.
The SPP Framework
The Small Power Projects (SPP) framework is the primary regulatory pathway for grid-connected renewable energy projects selling power to TANESCO. It is governed by the Electricity (Development of Small Power Projects) Rules 2020 (Government Notice No. 491 of 2020), as amended in 2025.
Project Categories and Thresholds
| Category | Capacity | TANESCO Relationship | EWURA Requirement |
|---|---|---|---|
| VSPP | up to 100 kW | May sell to TANESCO or operate off-grid | Exempt from licensing |
| SPP | 100 kW – 10 MW | Sells to TANESCO under SPPA | Registration or licence |
| IPP | above 10 MW | Negotiated PPA with TANESCO | Full generation licence |
Key 2025 Amendment Changes
The 2025 amendments materially changed several aspects of the SPP framework:
| Aspect | 2020 Rules | 2025 Amendments |
|---|---|---|
| Size cap | 100 kW – 10 MW (exceptions over 10 MW) | Strictly 100 kW – 10 MW; no exceptions |
| Hybrid fossil fuel | No explicit limit | Capped at 25% of installed capacity |
| Solar tariffs | Technology-specific feed-in tariffs | Competitive bidding |
| SPPA amendments | Prescribed in Third Schedule | Non-negotiable; no substantive amendments |
| Performance Agreement | Not required | Mandatory |
| Strategic areas | As needed | Annual July publication |
| REA endorsement | Not required | Required for mini-grids |
Competitive Bidding for Solar Tariffs
Solar projects no longer receive fixed feed-in tariffs. Instead, tariffs are set through competitive bidding. The previous tariff bands provide a reference:
| Capacity Band | Previous Tariff (Reference) |
|---|---|
| 0.1 – 0.5 MW | 10.54 US cents/kWh |
| 0.51 – 1 MW | 9.84 US cents/kWh |
| 1.01 – 5 MW | 9.24 US cents/kWh |
| 5.01 – 10 MW | 8.34 US cents/kWh |
Payments are made in US dollars or another hard currency, providing exchange rate stability for developers.
The Standardized Power Purchase Agreement
The SPPA is the contractual foundation of every SPP project. It is non-negotiable and must be signed as issued by EWURA.
SPPA Key Terms
| Term | Provision |
|---|---|
| Contract duration | Typically 20–25 years |
| Payment currency | US dollars or other hard currency |
| Tariff setting | Competitive bidding (solar/wind); standardized tariffs (hydro/biomass) |
| Take-or-pay | Must-take provisions for eligible renewable systems |
| Grid connection | Developer responsible for connection costs |
| Metering | TANESCO specifies metering arrangement |
| Force majeure | Standard provisions |
| Termination | Defined conditions and compensation |
What Developers Cannot Change
- Payment terms and currency
- Tariff calculation methodology
- Grid connection cost allocation
- Default and termination provisions
- Dispute resolution mechanism
Only EWURA-issued addenda modify the SPPA. Attempting to negotiate terms with TANESCO directly will delay the project.
TANESCO Grid Connection Process
The grid connection process involves multiple stages with TANESCO’s engineering and commercial departments.
Connection Timeline
| Stage | Activity | Duration |
|---|---|---|
| 1 | Preliminary enquiry to TANESCO | 1–2 weeks |
| 2 | Formal application submission | 2–4 weeks |
| 3 | Grid capacity assessment | 4–8 weeks |
| 4 | Technical and commercial benefit review | 4–6 weeks |
| 5 | SPPA execution | 2–4 weeks |
| 6 | Connection study and design | 8–12 weeks |
| 7 | Construction and commissioning | Project-dependent |
Required Application Documents
- Completed TANESCO application form
- System description (capacity, technology, inverter type)
- Electrical single-line diagram
- Site layout plan
- Proof of site ownership or long-term lease
- Business registration certificate
- Taxpayer Identification Number (TIN)
- VAT registration certificate
- Licensed electrical contractor’s credentials
- Environmental clearance (if required by NEMC)
Grid Capacity Assessment
TANESCO evaluates whether the local distribution network can accommodate the proposed solar injection. Key factors:
| Factor | Assessment |
|---|---|
| Transformer capacity | Sufficient headroom for additional generation |
| Line capacity | Conductor sizing adequate for reverse power flow |
| Voltage stability | Impact on local voltage profile |
| Protection coordination | Existing protection settings compatible with solar |
If the local transformer is at capacity, TANESCO may require the developer to fund upgrades or may reject the application. This is why early engagement with TANESCO’s regional office is critical before finalising site selection.
Net Metering Framework
Tanzania’s net metering rules provide a pathway for smaller systems to offset grid consumption.
Current Net Metering Parameters
| Parameter | Value |
|---|---|
| Governing instrument | Electricity (Net-Metering) Rules 2018 |
| Aggregate capacity cap | 5% of previous year’s peak load |
| Allocation | First-in, first-out |
| Eligible systems | Grid-connected solar up to the cap |
| Billing | Net credit against consumption |
National Energy Compact Commitments
Tanzania has committed to updating the net metering framework:
| Timeline | Commitment |
|---|---|
| By June 2027 | EWURA to revise, adopt, and enforce updated net metering rules |
| By mid-2026 | ZURA to develop net metering regulation for Zanzibar |
Net Metering in TANESCO’s Power System Master Plan
TANESCO’s Power System Master Plan 2024 Update projects gradual distributed solar adoption:
| Year | Net Metering Impact (MW) |
|---|---|
| 2024 | 3.76 |
| 2025 | 6.88 |
| 2026 | 10.10 |
| 2027 | 13.94 |
| 2028 | 17.44 |
| 2029 | 21.88 |
| 2030 | 22.10 |
These figures represent load reduction due to distributed solar generation. The relatively modest numbers reflect the early stage of Tanzania’s net metering market.
EWURA Licensing Thresholds
EWURA oversees all SPP licensing and registration. The threshold determines the application type.
Licensing Requirements by Project Size
| Project Size | Requirement | Application Fee |
|---|---|---|
| Below 100 kW (VSPP) | Exempt; letter of support from Ministry of Energy | None |
| 100 kW – 1 MW | Registration with EWURA | None specified |
| Above 1 MW | Full EWURA generation licence | TZS 100,000 |
Licence Application Process
- Prepare documentation: Business registration, technical description, financial model, land documentation, environmental clearance
- Submit Form 6: “Application for EWURA Licence for Grid-Interconnected SPP Greater Than 1 MW”
- EWURA review: Fast-track processing if no substantial negative public comments
- Public notice period: Stakeholders may submit comments
- Licence issuance: Formal licence agreement with EWURA
- Performance Agreement: Mandatory execution with EWURA (2025 amendment)
Annual Compliance Obligations
| Obligation | Deadline |
|---|---|
| Annual report to EWURA | Within 120 days after financial year-end |
| Performance Agreement milestones | As specified in agreement |
| Tariff compliance | Continuous |
Technical Interconnection Standards
TANESCO requires all grid-connected solar systems to meet specific technical standards.
Key Technical Requirements
| Requirement | Standard |
|---|---|
| Inverter protection | TBS-compliant anti-islanding and voltage/frequency ride-through |
| Earthing | TBS earthing standards for solar installations |
| Lightning protection | TBS lightning protection requirements |
| Metering | TANESCO-specified metering arrangement |
| Power quality | Voltage and harmonic limits per TBS standards |
| Safety disconnect | Visible lockable disconnect at point of connection |
Inspection Checklist
TANESCO inspectors verify the following before energisation:
- Inverter settings match approved specifications
- Protection relays configured correctly
- Earthing system installed and tested
- Metering arrangement matches application
- Labelling and signage compliant
- Safety disconnect accessible and functional
- As-built drawings submitted
Import Duty Exemptions and VAT
Tanzania offers significant tax incentives for solar equipment.
VAT Exemptions (Finance Act 2025)
| Equipment | VAT Status |
|---|---|
| Solar panels/modules | Exempt (0%) |
| Solar inverters | Exempt (0%) |
| Solar charge controllers | Exempt (0%) |
| Solar lights | Exempt (0%) |
| Vacuum tube solar collectors | Exempt (0%) |
| Solar batteries (solar-specific) | Exempt (0%) |
| General-purpose batteries | 18% VAT |
Import Duty
| Equipment | Import Duty |
|---|---|
| Solar panels | 0% (EAC CET) |
| Solar manufacturing machinery | 0% (capital goods) |
| Non-solar batteries | 25–35% |
Practical Considerations
- VAT rate: 18% mainland, 15% Zanzibar
- VAT deferment on capital goods available until 30 June 2026
- Zero-rating provisions run 1 July 2025 to 30 June 2028
- Proper HS code classification is essential
- Documentation delays can add 7–14 days at customs
Common Mistakes
| Mistake | Consequence | Correct Approach |
|---|---|---|
| Attempting SPPA negotiation | Weeks of delay, potential rejection | Sign the SPPA as issued |
| Site selection before checking strategic areas | Application rejection | Wait for July publication or confirm with TANESCO |
| Incomplete EWURA application | Returned for correction (30–60 day delay) | Submit complete documentation first time |
| Incorrect battery HS code | Standard duty and VAT applied | Use solar-specific classification with documentation |
| Energising without inspection | Disconnection, penalties | Obtain written approval before switching on |
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Related Guides
- Tanzania Solar Compliance Hub — Full country guide covering EWURA, REA, and national regulations
- Dar es Salaam Solar Compliance Guide — Municipal permits, Ilala and Kinondoni requirements
Frequently Asked Questions
What is the capacity limit for Small Power Projects in Tanzania?
The SPP framework covers renewable energy projects from 100 kW to 10 MW. Projects below 100 kW are classified as Very Small Power Projects (VSPPs) and are exempt from licensing. Projects above 10 MW fall outside the SPP framework and require a full Independent Power Producer (IPP) licence. The 2025 amendments strictly capped SPPs at 10 MW with no exceptions.
Can I negotiate the Standardized Power Purchase Agreement with TANESCO?
No. The Standardized Power Purchase Agreement (SPPA) is non-negotiable. Developers must sign the EWURA-approved SPPA without substantive amendments. Only EWURA-issued addenda are permitted. This standardisation reduces negotiation time and provides contractual certainty, but developers must accept the terms as written. The SPPA governs payment in US dollars or another hard currency.
What are the technical standards for grid interconnection in Tanzania?
TANESCO requires all grid-connected solar systems to comply with Tanzania Bureau of Standards (TBS) technical standards and TANESCO’s internal grid codes. Key requirements include: inverter protection settings compliant with TBS standards, earthing and lightning protection, metering arrangements specified by TANESCO, and single-line diagrams approved by TANESCO engineering. Systems must pass TANESCO inspection before energisation.
How does net metering work under the 2018 Rules?
The Electricity (Net-Metering) Rules 2018 allow grid-connected solar customers to offset consumption with self-generation. The total net metering capacity is capped at 5% of the previous calendar year’s peak load, allocated on a first-in, first-out basis. Exported energy is credited against the customer’s bill. The rules are scheduled for revision by June 2027 under Tanzania’s National Energy Compact commitments.
What import duty and VAT exemptions apply to solar equipment?
Solar panels, inverters, charge controllers, and solar lights are VAT-exempt under Tanzania’s Finance Act 2025. Import duty on solar panels is 0% under the East African Community Common External Tariff. Solar batteries are only VAT-exempt if specifically designed for exclusive solar power storage — general-purpose batteries attract 18% VAT. Standard VAT on mainland Tanzania is 18% and 15% in Zanzibar.
What is the timeline for TANESCO grid connection approval?
The full TANESCO grid connection process typically takes 8 to 16 weeks from initial application to energisation approval. This includes: preliminary enquiry (1–2 weeks), formal application review (2–4 weeks), grid capacity assessment (4–8 weeks), technical approval (4–6 weeks), and final inspection and meter installation (2–4 weeks). Delays often occur if the local transformer is at capacity or if documentation is incomplete.
