How To Match The Capacity Of Photovoltaic Panels, Inverters, Lithium Batteries？

For the configuration of photovoltaic panels, it mainly depends on the needs of customers and use scenarios.
Key factors: illumination duration, load size, battery backup duration, and whether the battery is connected to the grid.

For example:

Load 3KW,

The load operates at full time during the 7Hrs light period,

Run 10Hrs at non-light time,

With only photovoltaic as input,

If it rains the next day, consider mains or diesel generators.

The following is the specific calculation process:

Daily total electricity consumption: 3KW * 17hrs = 51kwh

Battery time required: 10 hrs

Battery power supply: 3KW * 10=30kwh, considering the battery DOD@80%, the total capacity of the optional battery 30KWH/0.8= 37.5KWH

MPPT power: 51KWH/7hrs=7.3KW

Inverter power: 3KW/0.8= 3.75KW

Photovoltaic panel: 51KWH/7hrs/0.9= 8.1KW

Based on the above calculation, the actual configuration is as follows:

Photovoltaic panel: 580W * 14pcs

Inverter: 8KW or 10 kW 1unit

Lithium battery: 10.24KWh* 4units, or 14.4KWH*3units

From the current order demand point of view, for home energy storage, most customers can choose: the battery is 2-3 times that of the inverter, such as the inverter 5-10KW, the battery is optional 10-15KWH.

If you have a selection problem, contact ONESUN and we can do a professional selection calculation for you.