Two different things people call 'solar'
Before you request any quotes, it is worth being clear about which technology you are actually asking for. The word 'solar' covers two very different systems, and confusing them leads to mismatched quotes and disappointment.
Solar PV vs solar water heater at a glance
| Solar PV (photovoltaic) | Solar water heater (SWH) | |
|---|---|---|
| What it does | Converts sunlight into electricity for your home and/or the grid | Uses sunlight to heat water stored in a tank for domestic use |
| What it replaces | Grid electricity (CEB units) | Electric or gas water heating |
| Typical components | Panels, inverter, wiring, optional battery | Collector panel, insulated storage tank, pump or thermosiphon |
| Complexity | Higher — involves grid connection, inverter management | Lower — largely passive, few moving parts |
| Relative cost | Higher upfront investment | Lower upfront investment |
| Best suited for | Households with significant daytime electricity use | Almost any household with a hot-water need |
For most Mauritian families, a solar water heater is the logical first move. Hot water heating is a significant share of the average household electricity bill, the technology is mature and reliable, and the economics are straightforward. Solar PV is a larger and more complex commitment — but it can be transformative for the right household.
Solar water heating: the simpler starting point
A solar water heater consists of a roof-mounted collector — either flat-plate or evacuated-tube — connected to an insulated storage tank. In a thermosiphon system (the most common type in Mauritius), water circulates naturally by convection, with no pump required. The sun heats the water during the day; the insulated tank keeps it warm into the evening.
Mauritius's year-round sunshine means a properly sized and positioned solar water heater will cover the large majority of your hot-water needs without any backup heating on most days. A backup electric element is usually included for cloudy stretches — but you will use it far less than a conventional geyser.
Key questions to ask when buying a solar water heater: Is the tank capacity right for your household size? What is the warranty on both the collector and the tank? Does the installer offer a service contract for periodic checks and descaling? Mauritius's tap water can carry mineral deposits that gradually reduce efficiency if the system is not maintained.
Solar PV: generating your own electricity
A solar PV system converts sunlight directly into electricity. In a grid-tied setup — the most common residential choice in Mauritius — your panels generate power during daylight hours, which your home consumes first. If you generate more than you use, the surplus can flow back to the CEB grid. If you use more than you generate, you draw the difference from the grid as normal.
The CEB (Central Electricity Board) is Mauritius's electricity utility and is the authority for any grid-connection arrangement. It offers arrangements for small household generators — often described loosely as 'net metering' — that allow you to benefit from surplus generation. The precise rules, eligibility criteria, connection fees, and export tariffs change over time. You must check the current CEB terms directly before committing to a PV installation, because what was true when your neighbour installed their system may not apply today.
When assessing whether PV makes sense for your home, think about your consumption pattern. Solar PV produces electricity during the day, so households that run heavy loads in daylight hours — air conditioning, a pool pump, a home office — get the most direct value. If most of your consumption is in the evening, you either need battery storage or you rely more heavily on the export arrangement, which changes the economics.
- Request a generation estimate based on your specific roof orientation and local shading — not a generic Mauritius average.
- Ask the installer to model your bill impact against your actual recent CEB invoices, not a hypothetical household.
- Confirm the system size your installer proposes is within the current CEB limit for residential connections.
- Understand the inverter warranty separately from the panel warranty — the inverter often has a shorter warranty period and is a critical component.
Do you need a battery?
Battery storage has become more accessible in recent years, but it adds meaningful cost and complexity to a residential solar installation. Before assuming you need one, it is worth thinking through what you are actually trying to achieve.
If your main goal is to reduce your CEB bill and you have a grid-tied system with a favourable export arrangement, a battery may add less value than you expect — the grid effectively acts as your 'storage'. Batteries make more sense if you experience frequent power cuts and want backup power, if you have significant evening consumption that you want to run on solar energy, or if grid export terms are not attractive.
Battery technology also continues to evolve quickly. Some homeowners find it makes sense to install a PV-ready system now — with an inverter that can accept a battery later — and add storage only once the economics or your circumstances make it compelling. Ask your installer whether their proposed inverter is 'battery-ready' if this is a path you want to keep open.
Is your roof ready for solar?
Not every roof is immediately suitable for solar, and a good installer will assess yours honestly before taking your money. There are four things to consider.
- Orientation and tilt: In Mauritius, a north-facing roof at a moderate pitch captures the most solar energy across the year. East or west-facing roofs can still work well, particularly for water heaters. A south-facing roof will underperform significantly. Your installer should model the actual orientation of your available roof planes.
- Shading: Trees, neighbouring buildings, chimneys, and water tanks that cast shadows on your panels during peak sun hours reduce output materially. A shading analysis — even a simple one — should be part of any credible site survey. Microinverters or DC optimisers can partially mitigate shading losses if your roof cannot be redesigned.
- Roof age and condition: This is the point many homeowners overlook. Solar panels and water heater collectors are designed to last two decades or more. If your roof sheeting is already ageing or corroding, you may face a costly removal and reinstallation of your solar system partway through its life. If your roof has fewer than ten years of good life left, re-roofing before installing solar is almost always the smarter sequence.
- Structural capacity: Panels and water heater tanks add weight to your roof structure. A qualified installer will assess whether your roof framing can bear the load, particularly for larger PV arrays or for thermosiphon water heaters where the tank sits on the roof.
How to choose a solar installer in Mauritius
Solar installation quality varies considerably. The panels themselves are largely commoditised — the difference between a good installation and a poor one comes down to design, workmanship, the quality of secondary components like the inverter and wiring, and critically, what happens after installation.
- Get at least three written quotes. Quotes should specify panel brand and model, inverter brand and model, system size in kilowatts peak, estimated annual generation, installation timeline, and warranty terms for each component.
- Ask for references from completed installations — ideally from systems that have been running for at least two years. Call them. Ask specifically about after-sales responsiveness.
- Confirm the installer handles the CEB connection application on your behalf and has done so successfully before. Navigating CEB paperwork is part of the job.
- Check that the installation will comply with the relevant local electrical codes. The inverter and grid connection must be installed to standard.
- Clarify who is responsible if a roof leak develops at a mounting point. Good installers use sealed, flashed mounts and take responsibility for watertightness.
Prouva's directory lists solar installers operating in Mauritius, with structured reviews covering whether they responded promptly, showed up as agreed, delivered quality work, charged fairly, and whether the reviewer would recommend them. Reviews backed by an invoice or contract are marked Verified and carry significantly more weight in the rating. A Verified badge tells you the owner has claimed the listing and we've checked their identity and, where applicable, their business registration — so you can see at a glance who stands behind their reputation. Where evidence has raised concern, a high-risk flag will appear on the listing.
Warranty terms deserve particular scrutiny. Panel manufacturers typically offer a long performance warranty — often twenty-five years or more for premium brands — but this is only useful if the manufacturer is still trading and has a local claim process. An installer who has been in business in Mauritius for several years and can point to a track record of honouring warranty claims is more valuable than one offering paper warranties with no practical support.
Ongoing maintenance
Solar systems are low-maintenance, but not maintenance-free. Dust, bird droppings, and salt haze (particularly in coastal areas of Mauritius) accumulate on panel surfaces and reduce output. Periodic cleaning — with water and a soft brush, avoiding abrasive materials — keeps your system performing well. Some installers offer annual service contracts that include cleaning and a system health check.
For PV systems, your inverter display or monitoring app will show daily generation. If you notice a sudden unexplained drop in output, investigate promptly — a faulty string, a failing inverter, or panel damage are easier and cheaper to fix when caught early. Most modern inverters connect to a monitoring portal that can alert you to faults automatically.
For solar water heaters, an annual check of the collector, tank, and any valves or sensors is good practice. In harder-water areas, periodic descaling of the tank extends its life. If you notice that your hot water is reliably cooler than it used to be on sunny days, it is worth having the system inspected rather than assuming it is simply a weather issue.
When you come to choose or revisit your installer, checking their track record on Prouva for post-installation support and responsiveness is a practical way to filter for the kind of after-sales relationship that makes the maintenance side of solar straightforward rather than frustrating.