4 ms·
I wonder if "4-5 useful hours per day" is per sunny day, so you can cut your number in half again for cloudy days.
by gibspaulding 6y ago
I wonder if "4-5 useful hours per day" is per sunny day, so you can cut your number in half again for cloudy days.
- chrismorgan 6y agoNo, this is from averaging it across the entire year, based mostly on locations in the south of Australia (Gippsland, Melbourne, Adelaide, Ballarat, those sorts of areas), but I looked briefly at other parts of the world also. The idea is then that a panel rated at 250W can produce an average of about 1kWh per day when pointed in the optimal direction and never shaded (but without tracking the sun); the average winter day may get you only 500W, and the average summer day over 1500W, with plenty of variation within those seasons day by day also.