At Magic Global tech, we have solar panels, inverters and batteries of different sizes that can power either an entire building or selected appliances in the building. We install in homes, offices, factories, shopping malls and stadiums as well. With 4 hours of full sun, our 250 watts solar panels can give you 250 watts x 4 hours electricity. That’s 1 kwh (1,000 watts) in a day per 250-watt panel. If you multiply 1kwh per panel by 30 days in a month, you’ll find that each 250 watt rated panel will produce about 30 kwh in an average month. Give us a call today on, tell us what you want.