Housted wrote:
Solar ratings are based on being at the equator at high noon on June 30 on a clear day with the panels facing at the sun.
In other words you will probably not see the full wattage anywhere in North America.
Its not magic or mysterious just remember more solar is better than less.
The same goes for battery reserve.
I have 1000 watts of solar and a 400 Amp HR lithium battery and it serves us very well. I do not try to run the A/C off the inverter.
YMMV
Housted
and it assumes using an MPPT controller AND at a pretty low temperature.
Hint. to best aim the panel take a empty TP tube, place it perpendicular on the panel and adjust for zero shadow.
I have two 200W portable panels going to a 30A MPPT controller. In theory I should be able to get 30A out of this. In practice (1) seldom is there an absolutely clear sky, any haze, smoke, etc. even if you can't see it affects output, (2) seldom is the temperature down around 60F in the middle of the day, let alone panel temps 70F or below. I can usually count on getting 20-22 A at the peak of the day properly aimed on a bright day.
If I add my third portable 200W panel then I can max out at 30A.
I also have three 160W panels mounted flat on the roof going to another 30A MPPT controller. Again theory say 30A no problem. but (1) a flat panel at northern latitude in the spring or fall drops max output by about 50%. I can usually get 15A and when I parallel the third portable panel with the roof properly aimed up in the mid 20's.
the two MPPT controller can have the outputs in parallel, roof controller is the master, portable is the slave.
so between the combo of three 160W flat panels and three 200W portable aimed panels I can see 45A occasionally 50A or so for peak charge current, when in theory I could get around 75A. Now with proper aiming the roof panel output would go up, but with roof mounts that's pretty much impossible. And even though I can raise the roof panels, seems like seldom can I raise the roof panels to aim anywhere near south. usually end up parked so raising them the either face east or west.