Capacity Home Battery Calculation

How do you determine which home battery fits the energy needs of your customers? We explain how to easily calculate the required capacity of a home battery, whether your customer has solar panels or not.

Understanding energy consumption

Before making this calculation, it is essential to understand your customer’s energy consumption. Does your customer have a smart meter? Great! You can easily read their (annual) energy consumption.

Also, ask your customer about their future plans. Think about family expansion, purchasing an electric car with a charging station, or installing a heat pump. Even if your customer does not want solar panels but is considering a home battery, this is useful information. All these details help tailor the home battery to the customer's future energy needs.

How do you calculate the required capacity of a home battery?

Does your customer not have solar panels? No problem. In this case, the larger the battery capacity, the lower the energy cost per kWh. This is particularly beneficial for customers with a dynamic energy contract, where electricity prices fluctuate throughout the day.

For customers with solar panels, there is a simple rule: 1 to 1.5 kWh battery capacity per kWp of solar panels. The customer’s annual energy consumption plays a significant role. Use the table below to estimate the required battery capacity.

How does a home battery work again?

Without solar panels, with a smart meter and dynamic energy contract

Even without solar panels, a home battery can provide many benefits. Together with a smart meter and a dynamic energy contract, the battery stores energy when rates are low. When energy prices rise, your customer can use the stored energy, leading to significant savings and helping to balance the electricity grid.

With solar panels and a smart meter

For customers with solar panels, the panels often generate more electricity on sunny days than is immediately used. This extra energy is automatically stored in the home battery via the smart meter. Later in the day, for example in the evening when more electricity is needed, the customer can use the stored energy or sell it back to the grid at a better price.