Its mean you need 480 watts for 4 hours where 80w solar panel will produce 480 watts as sunshine is 6 hours.
Solar panel for home appliances.
So you need a 80 watt solar panel.
This durable panel is ideal for a variety of dc applications including rvs 12 volt battery charging boats small pumps and led lights.
To know the battery bank inverter and charge controller size for this system see the link in the foot note.
It also helps to not have any major electric heating or cooling appliances.
The power company credits the home or business owner for the energy on their electric bill or the power fed back into the grid may cause your meter to run backward.
Electric heat electric hot water electric cook stove electric heated clothes dryer and air conditioners account for 80 percent of typical monthly utility bills.