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Grid Tied PV System with Battery Backup – User Manual
Version UM1142-PV-BT-v1.0 © solarcity 2019
When there is a grid outage, the inverter disconnects from the grid and switches to backup mode. While in this mode only the circuits
wired into the backup section of the inverter will be powered. While in backup mode these circuits are isolated from the grid. This is a
regulatory requirement to protect the repair crews working on the power lines in the blackout area.
The inverter uses energy from the solar panels and / or the battery to power your backup circuits. The inverter has a maximum power
rating of 3.68 kW (or 3680 Watts). That means the combined energy consumption of your appliances, devices and lights must be kept
under that limit. If you go over the limit, the inverter will switch off and try reconnecting after a defined interval. If this happens, reduce
your energy consumption by switching off any high wattage appliances like a heater or electric jug. The inverter will keep attempting to
reconnect with reconnection intervals getting longer at each attempt (up to a maximum of one hour).
When the battery charge level reaches a pre-set minimum, it will stop supplying power. If the solar system is generating power the
battery will be recharged.
5.4.1 Backup Generators
It is critical that changeover switches are installed and used correctly to prevent permanent damage to equipment.
It is possible to configure a backup generator to the system so that it can provide additional generation during a grid
outage, but it is extremely important that the changeover switch is wired correctly to prevent damage to the backup generator or the
solar/battery system.
The generator should always be completely isolated from the inverter. If you have a backup generator, or wish to install one, then
please contact solarcity to discuss options. If you fail to do so, any damage to your equipment, or ours, is your responsibility.
If you are unsure, please contact us on 0800 11 66 55, or email technicalcare@solarcity.co.nz
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