Manual Energy Storage Inverter ESI-S
Electrical design and installation 47
WARNING: Once the auxiliary fuse box is closed, the DC bus is automatically charged
when the upstream network is live. Therefore, close the auxiliary circuit only when the
upstream power circuit is not live. Failure to adhere to this guideline may result in
injury or death.
6.8 Connection of the ESI-S to the network
WARNING: The ESI has to be installed in parallel with the loads, preferably on a free
feeder. Local regulations and requirements prevail in determining how the equipment
has to be connected to the network. The feeding cables to the inverter must be
protected by their own cable and equipment protection device (see
Section 6.7
WARNING: The ESI can operate on networks with nominal voltage in the range 208-240
V and 380-415 V. The unit must be configured for the operation range it will be used
on. Follow the guidelines in this section to ensure that the hardware is configured
properly. Failure to do so may lead to inverter damage.
NOTE: When installing an inverter in installations containing power factor correction
capacitor banks, it is recommended to use detuned capacitor banks and to connect
the capacitor banks upstream of the inverter measurement CTs.
NOTE: The ESI is not compatible with high impedance devices installed upstream of
the inverter in the neutral. The ESI may refuse to start or may not function correctly
when such a device is present. For best ESI performance, these devices have to be
removed or bypassed.
6.8.1 Connection of the ESI-S
In order to connect the ESI-S, follow the below guidelines:
1. Fix the inverter mechanically to the wall (Cf.
Section 5.4
2. Ensure that an appropriately selected protecting device is connected upstream and
that the power supply cables are not live
3. Remove the protective cover present at the bottom right side of the inverter (Cf.
