60 Cell Panel vs 24v Bank MPPT and PWM UPDATE
UPDATE--results with MPPT posted 1 June. Got a chance to run this test today with no clouds but a slight haze up high so not quite 1000 insolation, showed as 8.93Isc vs rated 9.0, however that did ...
Forum Discussion
Batteries will charge at a much lower voltage than 29.6V and even below 28V but it's not the optimal charging.
A somewhat analogous situation would be to charge a 12V battery with a 30 cell/15V panel. Wonder why a 36 cell panel is normally used... One of the benefits of MPPT is the conversion of lower amps to higher amps and a 60 cells/24V setup doesn't provide that so perhaps better to just use PWM.
BFL wants to use the setup to charge both 12V and 24V while most of just setup for 12V charging with no further thought.
So perhaps 60 cells/24V is a option BFL whom I think sleeps with the battery in his bed. :) But for the average person that spends a lot less time battery tending it's a marginal approach. But then again there is always new knowledge to absorb.
A somewhat analogous situation would be to charge a 12V battery with a 30 cell/15V panel. Wonder why a 36 cell panel is normally used... One of the benefits of MPPT is the conversion of lower amps to higher amps and a 60 cells/24V setup doesn't provide that so perhaps better to just use PWM.
BFL wants to use the setup to charge both 12V and 24V while most of just setup for 12V charging with no further thought.
So perhaps 60 cells/24V is a option BFL whom I think sleeps with the battery in his bed. :) But for the average person that spends a lot less time battery tending it's a marginal approach. But then again there is always new knowledge to absorb.
