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Solar batteries in Mauritius:
Buy or Rent?
The Mauritian solar storage market has evolved. Before signing anything, here is a factual analysis of the four available options — with their real costs, real constraints, and what the numbers reveal over 20 years.
The context: why batteries have become essential
Until 2024, battery storage was optional for households in Mauritius. The new CEB 2026 framework changes this: hybrid systems (PV + battery) up to 10 kW become the standard for the Household scheme. The battery is no longer an accessory — it is a mandatory technical component of the application file.
Add to this the CEB tariff increase of +15% on 1 May 2026, which makes the return on investment calculation even more favourable for solar. The question is no longer "do I need a battery?" but "how do I finance it intelligently over 20 years?"
A residential lithium-ion battery costs between Rs 150,000 and Rs 300,000 to purchase. It has a lifespan of 8 to 12 years. Its replacement is inevitable over a 20-year contract.
The 4 options available in Mauritius
Each option has its real merits and constraints. Here is an honest presentation of each (e.g. 8/10 kWh solar system).
Comparative table — Estimated total cost over 20 years (8 kWh system)
| Cost item | Cash purchase | Bank loan | Long-term rental | Bank leasing |
|---|---|---|---|---|
| Initial investment | Rs 400–900k | Rs 0 (loan) | Rs 390k (PLM) | Rs 0 |
| Mortgage / surety | N/A | Mortgage required | ✓ Not required | Surety + guarantees |
| Monthly payments / interest | — | Rs 150–300k | Rs 480k (20 years) | Rs 120–250k (5–7 years) |
| Technical risk | 100% yours | 100% yours | ✓ 0% (lessor) | 100% yours |
| Maintenance over 20 years | Rs 400–600k | Rs 400–600k | ✓ Included | Rs 400–600k |
| Battery replacement (~year 10) | Rs 150–250k | Rs 150–250k | ✓ Included | Buyback / refinancing |
| CEB admin management | Your charge | Your charge | ✓ Included | Your charge |
| Recourse / contractual protection | Limited — no follow-up framework | Limited — no follow-up framework | ✓ 20-year contract + guaranteed after-sales | Limited — no follow-up framework |
| Estimated total cost 20 years | Rs 950k–1.75M | Rs 1.1M–2M | Rs 800k–950k | Rs 1.2M–2M+ |
* Estimates based on 2026 market data. Actual costs vary by installer, configuration and component price evolution.
Our analysis
On purely financial grounds, long-term rental presents the lowest estimated total cost over 20 years, provided the lessor meets its commitments. That is the key: the quality of the offer depends entirely on the solidity and seriousness of the chosen provider.
Cash purchase remains relevant for profiles with the capital, good technical knowledge and a trusted installer with structured after-sales service. Standard bank credit should be avoided except for the CEB/DBM green loan at 2%, which remains the best available purchase financing option.
Bank leasing appears attractive in the short term but creates a costly cycle: sureties required despite bank ownership of the equipment, and at contract end an obsolete system to buy back or refinance. Over 20 years, it is the most deceptive option.
Long-term rental emerges as the financially and guarantee-wise logical choice — not because it is commercially attractive, but because the real cost of a poorly managed purchase over 20 years is systematically underestimated. Whatever option you choose: compare offers, verify the partner's technical competence, verify the partner's financial solidity, read contracts before signing and demand solid written guarantees.
⚠️ Before you sign: know the 8 warning signs
Abnormally low price, no written contract, pressure to sign immediately, refusal to specify brands… Discover the 8 concrete warning signs to detect a dishonest installer before committing.
Questions to ask any provider
Whether you buy, borrow or rent, ask these questions to every installer or lessor before committing.
- 1 What are your certifications (MQA, REC, manufacturer)?
- 2 How many installations completed in Mauritius? Can you provide client references?
- 3 Who carries out interventions — your own technicians or subcontractors?
- 1 How many years have you been operating in Mauritius?
- 2 Can you provide a balance sheet or bank references?
- 3 What is the legal structure of your company?
- 1 What written guarantees do you offer on equipment and labour?
- 2 What is the contractual response time in case of breakdown?
- 3 What are the conditions for early termination?
- 4 Does the contract include a service continuity clause in case of business cessation?
- 1 Who to contact in case of breakdown — a dedicated number, an app?
- 2 What is the battery replacement timeframe if it fails?
- 3 How are system software updates managed?
Checklist to take with you
Download this checklist and tick each item during your meetings with providers.
Glossary
Upfront single payment at the start of a long-term rental contract, equivalent to a personal contribution. It reduces monthly payments over the contract duration.
Battery-based energy storage system. Under the CEB 2026 framework, a BESS is mandatory for any hybrid PV system up to 10 kW connected to the grid.
Legal structure created specifically to carry a defined project or activity. It isolates the project's financial risk from the parent company.
Calculate your solar potential
Before choosing a financing option, estimate your real solar production in Mauritius based on your location and consumption.