Monthly Archives: July 2026

Which solar battery capacity should you choose? The answer by profile

5, 10 or 15 kWh? The question may sound technical, but it isn't: the right battery capacity depends on one thing alone — what your home consumes between your evening return and sunrise. Here is the method to find out in five minutes using a bill, along with typical profiles and the two costly mistakes to avoid.

The principle in one sentence

The battery is a reservoir: it fills with the day's surplus and empties to cover your evening and nighttime consumption. The right size is therefore the size of your night, not the size of your roof or your budget. If it is too small, it is full at 2 p.m. and the rest of your solar energy is sent to the grid for 1 cent per kWh. If it is too large, you have paid for storage capacity that is never filled. In both cases,

Quelle capacité de batterie solaire choisir ? La réponse par profil

5, 10 ou 15 kWh ? La question paraît technique, elle ne l'est pas : la bonne capacité de batterie dépend d'une seule chose — ce que votre maison consomme entre le retour du soir et le lever du soleil. Voici la méthode pour la connaître en cinq minutes avec une facture, les profils types, et les deux erreurs qui coûtent cher.

Le principe en une phrase

La batterie est un réservoir : elle se remplit avec le surplus de la journée, et se vide sur votre consommation du soir et de la nuit. La bonne taille est donc celle de votre nuit, pas celle de votre toit ni de votre budget. Trop petite, elle est pleine à 14 h et le reste de votre soleil part au réseau pour 1 centime le kWh. Trop grande, vous avez payé des kWh de stockage qui ne se remplissent jamais. Dans

Plug & play solar kit: Is it legal? Declaration, insurance and co-ownership

Yes, a solar kit that plugs into a socket is completely legal in France. There is one formality — just one — free of charge and online: the CACSI declaration with Enedis, completed in ten minutes. Here is the step-by-step procedure, with answers for every situation: tenants, co-ownership, town halls and insurance.

The short answer

How to read (and compare) a solar quote: the 7 lines to check

Two quotes for “the same” installation can show a €4,000 difference—and the cheapest is not always the best deal, nor is the most expensive necessarily a sign of quality. The difference lies in the lines of the document. Here are the 7 points to check on every quote, in order, and the warning signs that should make you walk away.

The golden rule before you start

Line 1 — The exact equipment: brands, models and power ratings

Your panels are installed: the first-year guide

The installation is complete, the app is displaying your first kilowatt-hours, and a new series of questions is coming up: do you need to change your EDF tariff? What do these figures mean? Is winter production normal? Do the panels need cleaning? Here is everything that awaits you during the first year — and the very short list of what you actually need to do.

Week 1: get familiar with the app

Your monitoring app displays a lot of figures, but only three deserve your attention. Production: what your panels generate. Consumption: what your home uses. And above all, the self-consumption rate: the share of your production that you consume yourself — this is what generates your savings, since each kWh consumed in your home is worth nearly 18 times as much as

Solar panel profitability in 2026: the new equation after the 5 June reform

On 5 June 2026, a decree redefined the economics of residential solar energy in France: surplus injected into the grid is now purchased at 1.1 c€/kWh, and the self-consumption bonus has been discontinued. Does this mean that solar energy is no longer profitable? No — but the calculation has changed. Here are the figures.

What changed on 5 June 2026

Until spring 2026, a residential installation was based on three revenue streams: self-consumed electricity, surplus sold to EDF OA (still at 4 c€/kWh at the beginning of 2026 for small installations), and the self-consumption bonus paid upon investment.

The amending decree of 1 June 2026, applicable to applications submitted from 5 June onwards, simplified — and tightened — this framework for installations up to 100 kWp:

Turnkey solar installation: the complete process explained

“Turnkey”, everyone promises it. But in practical terms, what happens between the day you request a quote and the day your meter starts slowing down? Here is the complete process, step by step, with actual lead times, prices, and the short list of what will be required from you. Spoiler: almost nothing.

What “turnkey” really means

A turnkey installation is a simple contract: you choose the power and budget, and everything else is taken care of. The assessment of your roof, system sizing, filing the declaration with the local council, Enedis grid connection, installation by a certified installer, compliance checks, and commissioning. You have a single point of contact from start to finish, and the approved quote is the final price.

This guide describes the process as we carry it out in

Plug & Play Solar Kit: The Complete Beginner's Guide

Generate your own electricity without construction work, an electrician or administrative paperwork: that is exactly what a plug & play solar kit makes possible. You set it up, plug it into a socket, and it generates power — in 10 minutes, start to finish. Here is everything you need to know before getting started: the law, location, battery, budget and actual savings.

What exactly is a plug & play kit?

One or two solar panels, a small box that converts their output into household electricity, and a plug. That's it. The kit plugs into a standard socket in your home, and the electricity generated directly powers your appliances: the refrigerator, internet router, freezer — everything that continuously consumes power in your home uses your solar energy first, before drawing from the grid.

The

Solar Battery for Your Home: A Guide to Making the Right Choice

Since the June 2026 reform, the battery has gone from being a comfort option to becoming the primary profitability driver for a solar installation. But what capacity should you choose? What format? At what price, and for what actual savings? This guide answers all these questions — without a line of technical jargon.

Why a Battery Changes the Calculation Completely in 2026

Let's start with the only thing you need to understand. Your panels produce mostly in the middle of the day. Your home, on the other hand, consumes mostly in the morning and evening. Without a battery, this mismatch has a direct consequence: a large part of your production is sent to the grid, where it is bought back from you at €0.011 per kWh. The same kWh, if you had consumed it at home, would have saved