You have had an installation quoted and the quotation comes to several thousand euros. This is usually when you start wondering what the state actually reimburses — and come across a jumble of bonuses, feed-in tariffs and VAT rates that do not all apply to the same project.

Sorting it all out is not that complicated. In 2026, state aid for solar panels rests on three pillars: the self-consumption bonus, the feed-in tariff for surplus electricity, and reduced VAT. MaPrimeRénov' and local aid may sometimes be added, but these are special cases. We review each scheme one by one: who is eligible, how much you can receive, and the order in which to complete the necessary steps.

Key takeaway: the amounts quoted correspond to the scales published by the Energy Regulation Commission (CRE), provided as a reference framework. They are revised every quarter. Always check the value in force on the date of your

You have decided to go solar, you request two quotes, and then doubt sets in: 6 kW or 9 kW? One seems a little too small, the other a little too expensive. And no one clearly tells you which one fits your home.

It is the most important decision in the entire project, and it is also the one most often decided backwards. Consider the common reflex: choose the largest option «for peace of mind». The problem is that targeting 9 kWp when you consume 6 means tying up several thousand euros to produce a surplus that you will sell for next to nothing. Conversely, staying with 6 kWp when you have a heat pump and an electric car means letting savings slip away — all the more painful since electricity prices rose sharply between 2022 and 2024.

The right level is therefore not a question of power in absolute terms. It is a question of your profile: what you consume, at what time, and under which roof. Let us see how to make the right decision.

Key takeaway

Your panels produce power in the middle of the day — precisely when nobody is home. In the evening, when everything switches on, you buy that same electricity back from the grid at a premium price. This is exactly the mismatch that a 3000W self-consumption solar kit with battery is designed to correct — and this is where it is easy to get lost in watts, kWp and profitability promises.

The 3 kWp system is now one of the most popular formats among French households. Powerful enough to cover a significant share of a home's consumption. Compact enough to remain affordable and, very often, suitable for DIY installation.

This guide gets straight to the point. How much does a 3000W kit really produce, what is the battery for, how should the system be sized, how much does it cost in 2026 and which models are reliable. The goal: buy the right kit the first time, without having to pay again in two years.

Why choose a 3000W solar kit?

A 3000W

“How much does a solar kit cost?” It is almost always the first question — and the answer is usually the vaguest one you find online. You come across all sorts of figures: a €300 kit, another at €15,000. Enough to make you wonder whether people are really talking about the same product.

They are talking about the same product. But a small 500 W plug-and-play kit costs around €300 to €600, whereas a 9 kW installation with a battery can exceed €15,000. In between, there are different power levels, equipment choices and installation options that can make the figure vary considerably.

This guide sets out the real price ranges for a solar kit in 2026, power level by power level, with and without a battery. The aim is not to sell you a price. It is to tell you what budget to plan for before you even open a product datasheet, and why two kits listed at the same power output can cost twice as much as each other.

Your electricity bill has gone up again, and you are starting to take a closer look at solar power. Then you open the first comparison guides: kWp, inverter, single-phase, self-consumption rate, incentives that change every quarter. Enough to make you close the tab.

We are going to do the opposite here. No pile-up of jargon, but a decision-making method. By the end, you will know exactly what to look at before buying a solar kit: the power, whether or not to include a battery, the connection, and the incentives applicable in 2026. This is the same approach we use at Kitsolaire to advise our customers.

A self-consumption solar kit, in practical terms

A solar kit includes all the equipment needed to produce your own electricity: the panels, the inverter (or microinverters), the racking system, the cabling, and increasingly often a battery.

We talk about a self-consumption solar kit when this electricity

Zendure SolarFlow Mix vs Anker SOLIX: Which Battery Should You Choose in 2026?

In 2026, the residential energy transition in France is reaching a new milestone. With regulated electricity prices continuing to rise to 0,1952 €/kWh under the Base option [1] and the gradual reduction in the surplus feed-in tariff to 4 c€/kWh [2], storing solar electricity rather than injecting it into the grid at a low rate has become the most profitable strategy. To meet this demand, two industry giants are competing in the smart energy storage market: Zendure with its brand-new SolarFlow Mix AC+ range and Anker SOLIX with its Solarbank