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 merits and real constraints. Here is an honest presentation of each (e.g. 8/10 kWh solar system).
Comparison 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 responsibility | Your responsibility | ✓ Included | Your responsibility |
| 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 signing: know the 8 red flags
Abnormally low prices, no written contract, pressure to sign, refusal to specify brands… Discover the 8 concrete red flags 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 performs the work — 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 intervention time in case of breakdown?
- 3 What are the early termination conditions?
- 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 point during your meetings with providers.
Glossary
A single upfront payment at the start of a long-term rental contract, equivalent to a deposit. It reduces monthly payments over the contract duration.
Battery 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. Isolates the financial risk of the project 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.