But at 77f 200 watts is 200 watts.no matter how you slice it?A solar panel, correctly oriented, on a sunny 77 degree day will have a considerably warmer surface. Cell temp and air temp. are two different things. Have you ever picked up a crescent wrench that has been lying in the sun for a while? Same idea.
2.1 Kw Suntech 175 mono, Classic 200, Trace SW 4024 ( 15 years old but brand new out of sealed factory box Jan. 2015), Bogart Tri-metric, 700 ah @24 volt AGM battery bank. Plenty of Baja Sea of Cortez sunshine.
@Estragon what are your nominal and peak amps from a 1000 watt array with 12 volt bank?
IIRC, the best I've seen is ~80a on a cool breezy day with broken cloud. In normal conditions more like 50-60a.
Thanks So normally 55 amps 10 % charge rate on a 550 amp hour 12 volt bank with around c/7 when it's putting out 80. But On a 450 ah @ 12 volts 55 amps = 13% with a max of 80 roughly c/6. A 624 bank @55 amps puts me at 9℅ And with 80 amps c/7.8 charge rate. looks to me a 550 is the best match for a 1000 watt array. Question is could I squeak by on a 624 ah bank by doing some bulk if needed. I only have a 300 watt inverter for TV dvd and charging phones. So I normally crank the generator each morning for making toast and using the Microwave and the S.O. blow drying etc. Or would it be a better match with 550 or the 450 battery bank. Suggestions?
Being that im in RV and want to stay 12 volt. With 600 + ahs im thinking for 30 minutes running a 800 watt washer. 5 or 10 minutes of Microwave 900 watts. and a 830 watt toaster 4 slices 5 min. Does it Sound doable ? I'd have 1200 watt hrs available with a 3 day reserve. With 5 avg sun hrs from April - aug would a 1000 watt array produce 3500 watt hrs per day ? Anyone
3500wh/(sunny)day is roughly right for a 1kw array most of the year in many locations, IMHO.
I wouldn't run more than one of the heavy (toaster/microwave) loads at the same time on a 12v system, but one at a time should be doable. Running the genny for heavy loads in the morning sounds like a good plan to me.