Frequently asked questions about home battery capacity

Start with annual consumption and solar panel output. An initial guideline is 60 to 80% of average daily usage. The check shows this range and, when solar output is known, a separate solar indication. There is no fixed size for every family.

Yes. You see an initial indication without leaving contact details. You can then request personal advice at no obligation. The check does not commit you to a purchase.

Your advice request is intended for installation partner SolarFast. You can request an assessment of capacity and technical options for your home. Sending requires your consent. This website does not compare installers.

No. kWh is an amount of energy: how much you store or use. kW is power: how quickly energy can be charged or delivered. Check both, because more storage does not automatically mean all appliances can run together.

The Dutch net metering scheme ends on 1 January 2027. Exported electricity can then no longer be offset against imported electricity; a feed-in payment remains. This change alone does not determine the right battery capacity.

The range is intended as a guide to solar storage. Without existing or planned panels, the check does not give personal solar-storage advice. Use with dynamic tariffs needs a separate assessment of costs, controls and risks.

Nominal capacity is the stated total storage. Usable capacity describes the portion made available by the system; charging and discharging also cause losses. Compare models on the same basis and ask the installation partner how much energy can reach your home.

No. The compact calculator does not estimate savings or payback. That needs usage patterns, contract terms, installation costs and losses, among other details. A capacity range is not proof of financial benefit.

You do not leave contact details to view the result. Only when requesting advice do you share details and consent to handling by installation partner SolarFast. No fixed response time is promised.

No. An advice request is non-binding. You decide whether you want a proposal and whether to accept it.

That depends on the model, supported modules and manufacturer conditions. Ask for supported expansion to be specified before purchase. A modular design does not mean every future combination is possible.

Consumption already included in your annual total is not counted again as a fixed allowance. Planned equipment needs a new consumption estimate. When you charge or heat also matters for sizing.

No. A backup function and suitable installation are separate requirements. A capacity figure does not tell you which appliances will continue working during an outage. Discuss this requirement with the installation partner.