Home Green Products Guide How much does residential solar power system cost?

How much does residential solar power system cost?

I am planning renovation of my home in some environment friendly way, I would like to install a residential solar power system to meet electricity of my home which has three rooms and one living room . According to my estimate, it would require around 400 watt electricity to light my whole rooms. Can you exactly tell me how much it would price including power storage, battery and inverter? Looking for suggestion and feedback. Have a wonderful day.