The theoretical energy storage of 48v 180ah battery is 8640wh, that is, 8.64kWh；; The voltage of 72 solar panels is 36V, which can be stored with 24V batteries. The voltage of 36 solar panels is 18V, which can be stored by 12V battery. If the solar panels are connected in series, the voltage will increase. In other words, if two 72 panels are connected in series, a 48V battery can be used to store electricity.

Matters needing attention in battery use

Pay attention to the sealed battery of battery type. After maintenance, be sure to tighten the slogan of battery safety valve, otherwise the battery will not work normally. It is forbidden to use the safety valve without fastening the opening. Deionized water or distilled water must be supplemented, and the resistivity of the water used should not be less than 300,000 ohms.

Capacity check: after the water supply and maintenance every six months, activate the battery capacity check and replace the battery with the spare battery. If the battery is not used for a long time, it still needs to be recharged once a month.