More Solar for "Us"
Ok, I went off.the deep end? Bought 3 used 37watt uni-solar panels and a blue sky 2000e controller for the hefty price of $400, They were being listed as 75w panels, they are not The tested open...
Forum Discussion
CA Traveler wrote:
no brainer choice. ie The MPPT controller cost vs the lower PWM cost was offset by more and smaller 12V panels and installation. Parts cost only was considered. About 500W was the crossover point.
Yes, lower cost of PWM is TAD offset by the number=cost of panels and a bit more wiring pains. What annoys me is that PWM are not as "automated" as MPPT. I'm not enjoying tinkering around my solar, this is not what I'm paying her for :)...
No personal experience with PWM though. From what I see, tapered volts in PWM are "disconnected" from the output amps, not same flexibility as MPPT when it comes to "smart" switching btw Boost/Abs/Float, i.e. auto-adjusting amps and Abs time. Or they don't want to invest in programmability when the goal is to lower the cost and increase sales volume. Can't beat Grape price, and it seems to be real thing unlike ubiquitous $20 Ebay babies.
CA Traveler wrote:
What about MS PWM controllers? No personal experience, just curious.
Those little black boxes with blinking green/yellow lights? They exist and popular, mostly in systems under 400W.
