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The year 2025 marks a decisive turning point for home batteries in France and Belgium. With the spectacular collapse of the French photovoltaic feed-in tariff in March 2025 (dropping from €0.13/kWh to €0.04/kWh), energy storage is no longer a comfort option: it has become the essential solution to maximize the profitability of your solar installation.
This comprehensive guide supports you in choosing, sizing, and optimizing your storage system, with systematic France/Belgium comparisons tailored to the tariff and regulatory realities of each country.
The photovoltaic feed-in tariff in France dropped by 68% in March 2025, from €0.1269/kWh to €0.04/kWh. This historic drop makes battery storage ultra-profitable: each self-consumed kWh now saves €0.23 instead of being sold for €0.04.
Sources: CRE, EDF OA Solaire, tariff order T1 2025
The home battery allows you to store solar electricity produced during the day for use in the evening and at night. Its economic interest depends directly on the gap between the purchase price from the grid and the sale price of your photovoltaic surplus.
"In March 2025, the ROI of home batteries in France was divided by three. What used to take 10-12 years is now profitable in 3 to 5 years thanks to the drop in battery prices (-70% since 2020) and the collapse of the feed-in tariff." — Wattuneed Analysis, CRE T1 2025 data + supplier price records
The home battery market is dominated by two major technologies, each with its distinct advantages:
💡 Recommended product: Pylontech US5000 (4.8 kWh LiFePO4) - €999.99 incl. VAT
European 48V reference, modular up to 96 kWh, 6000 cycles guaranteed - €208/kWh
The choice of home battery brand directly influences durability, warranty, and compatibility with your inverter. Here is a detailed comparison of the main solutions from
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