How to configure a 5KW off-grid energy storage system that can store 10 kWh of electricity?

1.Inverter selection:

Wisetree 5kw/5kva On/off-grid inverter is selected, the main features and parameters are as follows:

IP65 protection grade, suitable for outdoor installation;

Wide input voltage range, compatible with high efficiency components;

Fanless and quiet design, external inductor design;

Dual independent MPPT, suitable for different roof requirements;

Compatible with lithium batteries and lead-acid batteries;

Multiple operating modes: self-generation and self-consumption mode, time mode, standby power mode, off-grid mode, etc;

Advanced battery management technology to ensure battery life;

Reactive power adjustable, grid over-voltage and under-voltage, over- and under-frequency load shedding, anti-reverse current and other functions;

Support remote monitoring and remote upgrade.

2.Battery selection:

Wisetree series of grid-connected and off-grid all-in-one machine is compatible with lithium batteries and lead-acid batteries. The main differences between the two are as follows:

Plan to store 10 degrees of electricity, i.e. 10000VAh.The battery capacity calculation formula is as follows:

Battery capacity (Ah) = planned storage of electricity (VAh) / battery discharge depth (DOD) * battery voltage (V) * battery discharge efficiency (%)

1. Take lithium batteries as an example: depth of charge and discharge DOD = 90%, battery discharge efficiency of 95%, battery voltage = 48V, calculated battery capacity = 10,000VAh/0.90*48V*0.95=243Ah, Wisetree all-in-one compatible lithium battery specifications for 50Ah, you can choose to use 5 batteries in parallel, the total capacity of 250Ah.

2. Take lead-acid battery as an example: the charging and discharging depth of lead-acid battery is about 50%.

Calculate the battery capacity = 10000Ah/0.50*48V*0.95=439Ah.

Can choose 12V, 100Ah lead-acid battery 20, 4 series 5 parallel connection, the total capacity of 500Ah.