Mainly depends on the total power consumption of the household. Assuming that the power consumption of all electrical equipment in a family is 10kwh a day, A 3.2V 200Ah battery can provide 0.64KWH power. Then a total of 10/0.64≈
16 batteries are needed.
Contact us, choose battery specifications (100ah,161ah,172ah,200ah,228ah,300ah,345ah,400ah,456ah) according to different needs, and customize your wall mount battery capacity.