How to Design #energystorage #Off-grid PV Energy #Storage System Combined with Generator?

How to Design #energystorage #Off-grid PV Energy #Storage System Combined with Generator?

Growatt off-grid inverter #SPF5000ES already integrates the function of compatible with generator input, also with Growatt modular lithium battery to offer the whole energy storage system. Through reasonable design and setting, the off-grid storage system and generator can complement each other to provide stable and reliable power for users. It would help customers to enjoy the green and comfortable life anytime and anmhere.

As the following, we will introduce the details of how to design the whole system of off-grid energy storage system combined with generator:

1. Basic considerations of system design

1.1    Load condition: maximum power during peak load period

1.2    Battery backup time and backup load power rating

1.3    Generator power selection: the output power of generator must be higher than the maximum load power, if the generator is considered to charge the battery, the power should be increased more, generator with remote dry contact switch for start/stop function (only diesel generator available).

1.4    Average sunshine duration.

2.   Case application

2.1 Customer Needs: The actual daily load consumption is 20kWh for the house, the peak load power is around 4kW, the average daily sunshine duration is 4 hours, the backup power request is 3kW with backup time of 3 hours.

2.2 System Configuration:

22.1 PV1nverter: #SPF5000ES, 51<W AC output, 6kW PV panel input

2.2.2 Battery capacity. Back-up power x Back-up time + Efficiency + Battery

DOD = 3kW x 3hours + 90% efficiency + 80% DOD = 12.5kWh Based on the calculation, we propose the 13kwh AURORA series Lithium battery, configure 2pcs battery modules (2.56kWh/module).

2.2.3 Generator: 5kW diesel generator, could support dry contact startup.

#SOLAR #GROWATT #OFFGRID #SPF #available #africa #offgridsystem

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