08-11-2014, 10:19 AM
This is in reference to HI Someday's question in a different post... Hopefully this is helpful for others as well....
When calculating solar watts everything is always for a 1 hour period. So, a 250watt panel may produce 250watts in one hour. On average, we 3-4 sun hours per day here on Big Island. A 250 watt panel will actually produce about 200 watts at peak sun. When calcualting , weather must be considered. Production goes down greatly with clouds. The first thing we do when sizing is try to eliminate any inefficient appliances. Reducing your load is the first important step. When doing grid ties... We use approx ten dollars a month from your helco bill per panel. Example: a 200 dollar a month helco bill will take 20 panels.
Call for more specific information
808-969-1133
Http://www.builditgreen808.com
When calculating solar watts everything is always for a 1 hour period. So, a 250watt panel may produce 250watts in one hour. On average, we 3-4 sun hours per day here on Big Island. A 250 watt panel will actually produce about 200 watts at peak sun. When calcualting , weather must be considered. Production goes down greatly with clouds. The first thing we do when sizing is try to eliminate any inefficient appliances. Reducing your load is the first important step. When doing grid ties... We use approx ten dollars a month from your helco bill per panel. Example: a 200 dollar a month helco bill will take 20 panels.
Call for more specific information
808-969-1133
Http://www.builditgreen808.com