200 kW Sigenergy Backup System

This design involves 8 x 25 kW 3 phase Inverters each with 45 kWh backup batteries.

The design requirements were to supply a COC for the installation and modify the existing electrical supply and internal wiring and protection in line with the COC requirements while ensuring Eskom Voltage variations are monitored to protect the equipment from Voltage Surge spikes  phase loss, neutral loss, over and under voltage situations.

The Sans 10142 stipulates that users are fully responsible to protect their systems from all those above scenarios.

For long battery life the design had to ensure the current drawn from the batteries, never exceed 0.5C.

Ambient temperature played a big role in choosing the circuit breaker size and wiring sizes.