Solar help... Mppt or PWM
Hi.. I recently got a new solar panel from somewhere... fell off truck... lol I know mppt is the way to go im mysituation but am asking for advice... panel 250 watts volts 30v. Wh...
Forum Discussion
Lawrosa,
Some confusion here again.
Correct formula:
0.005 V per 1C per 2 V cell above or below 25C.
An equivalent variation if you can't use C:
0.028 V per 10F per 2 V cell above or below 77F.
Note that it's 77F, not 80F.
"Normally", temperature compensation is controller's job, not yours :)... Set and forget. Not the case with this controller, unfortunately.
I set my controller to switch to Float when current drops to 0.7A. You can't "set" yours, but try switching manually to Float when it drops to 1.5A maybe. There is no hard rule for that. If you always have some loads running, it may never drop below 2A.
Some confusion here again.
Correct formula:
0.005 V per 1C per 2 V cell above or below 25C.
An equivalent variation if you can't use C:
0.028 V per 10F per 2 V cell above or below 77F.
Note that it's 77F, not 80F.
"Normally", temperature compensation is controller's job, not yours :)... Set and forget. Not the case with this controller, unfortunately.
Can or do I charge at the higher voltage until the amps taper to what? 3 amps? 1 amp?
I set my controller to switch to Float when current drops to 0.7A. You can't "set" yours, but try switching manually to Float when it drops to 1.5A maybe. There is no hard rule for that. If you always have some loads running, it may never drop below 2A.
