The Sessy battery is available in 5 kWh and 10 kWh variants and uses a single-phase inverter with a charging power of 2.2 kW (≈9.57 A) & discharging power of 1.7 kW. Depending on the circuit protection and main connection, you can place multiple Sessy batteries on one circuit. In this article, you will read exactly how many Sessy batteries you can install per configuration and what to watch out for.
The Sessy Battery in Brief
Sessy is a smart, modular home battery system designed by and for the Dutch market. There are two variants available:
Sessy 5 kWh
Sessy 10 kWh
Both batteries use the same inverter:
Charging power: 2.2 kW
Discharging power: 1.7 kW
Single connection: single-phase
This means the current draw per battery when charging is a maximum of 9.57 amperes (A) at a mains voltage of 230V.
Why Is the Circuit Layout Important?
A circuit in the meter cupboard is always equipped with circuit protection (for example, a circuit breaker of 25A or 40A). Since each Sessy battery draws up to 9.57 A of current, you need to carefully consider how many batteries you can connect to one circuit without overloading it.
How Many Sessy Batteries per Circuit?
The table below provides a clear overview of the maximum number of Sessy batteries for different configurations, based on common circuit protections and main connections:
| Main Connection | Circuit Protection (per circuit) | Max. Number of Sessys on 1 Circuit |
|---|---|---|
| 1x25A | 1x25A | 2 on single-phase |
| 1x40A | 1x40A | 3 on single-phase |
| 3x25A | 3x25A | 2 per phase → total 6 batteries |
💡 Note: These numbers apply per circuit. Want to install more Sessy batteries? Then you can create multiple circuits, provided this fits within the limits of the main connection.
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