Watts needed
I have read where folks suggest any where from 1 to 2 watts of solar per ah of battery. My question, is this based on battery rating (ie 215 AH) or is it based on useable amp hours(105)? All reply...
Forum Discussion
For 2*285W you need at least 40A MPPT.
Renogy Rover 40 should be able to do the job, though I would use slightly smaller panels with this one, 2*260W. This controller will try to equalize the battery every 2 months and I "think" this feature can't be disabled. Some people wouldn't want this to be done automatically in their absence. An economic alternative is Renogy MPPT Rover 30 with Bluetooth, it allows to disable equalization feature, but you would have to use panels no bigger than 400W total, i.e. 2*200W.
Victron MPPT 150/45 will handle 2*285W and will allow you to change the charging profile, including equalization.
Maybe people will suggest something cheaper than Victron 150/45 and not much worse, but 45A MPPT is a lot of a controller, this is gonna cost ya.
Renogy Rover 40 should be able to do the job, though I would use slightly smaller panels with this one, 2*260W. This controller will try to equalize the battery every 2 months and I "think" this feature can't be disabled. Some people wouldn't want this to be done automatically in their absence. An economic alternative is Renogy MPPT Rover 30 with Bluetooth, it allows to disable equalization feature, but you would have to use panels no bigger than 400W total, i.e. 2*200W.
Victron MPPT 150/45 will handle 2*285W and will allow you to change the charging profile, including equalization.
Maybe people will suggest something cheaper than Victron 150/45 and not much worse, but 45A MPPT is a lot of a controller, this is gonna cost ya.
