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
If the controller drops to Float voltage before you want it to, it is very frustrating trying to get it back to Bulk, since the batts have to get down to 13.2 (eg) which can take a long time.
I used to run the inverter for a minute to knock down the voltage, but the batts soon got back to Vabs and then Float started. If you can program Float to be near the same higher voltage as Bulk, then you are good all day.
If the controller is set to do two hours at Vabs after getting there, and it gets there before lunch, then you have a problem depending on the situation. Mr Wizard has programmed that Vabs time to last longer, which is one way around it, if you cannot just make Float voltage the same as Vabs.
You get your break from being at Vabs "too long" when it gets dark.
BTW, some confusion in the previous posts. The MPPT controller has a buck converter in it to "make amps", which it still does even when not in Bulk (tracking active). A PWM controller does not have the buck converter and "makes amps" a different way. Apples and oranges.
I used to run the inverter for a minute to knock down the voltage, but the batts soon got back to Vabs and then Float started. If you can program Float to be near the same higher voltage as Bulk, then you are good all day.
If the controller is set to do two hours at Vabs after getting there, and it gets there before lunch, then you have a problem depending on the situation. Mr Wizard has programmed that Vabs time to last longer, which is one way around it, if you cannot just make Float voltage the same as Vabs.
You get your break from being at Vabs "too long" when it gets dark.
BTW, some confusion in the previous posts. The MPPT controller has a buck converter in it to "make amps", which it still does even when not in Bulk (tracking active). A PWM controller does not have the buck converter and "makes amps" a different way. Apples and oranges.
