Yip, I installed a inverter/charger and 4 x 12v 100ah batteries about 3 months ago, we have weekly power outage due to line breaks and cable theft,
Working out the costs involved, mine came in it at R10 000, but I have been wondering would it not have been better to just spend R7500 and install a 6.5KVA generator, fair it's not green, but then I can run my whole house.