Solar Power would be good to supplement your electricity supply. I did a little research: 2 batteries of 200Ah maintenance free = 66k 1 Xantrex 2424 inverter = 130k 1 Charge controller SUNPOWER10 12v 10amps = 5k 4 solarpanels of 30Watts each = 15k x 4 = 60k =============== Approximately 260k =============== If by day, you run your fridges and TVs run on Solar. And at night you run the appliances by electricity, your electricity bill will be quite less. Also if you live in a 'high security need' area - you will need backup electricity to keep those lights/cctv on and ring the alarms in case of anything. BR/