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
Mppt is a function/feature that a controller does and has nothing to do with the setpoint.
If a controller has the setpoint feature then when the setpoint voltage is met which is the output of the controller to the battery then the controller will revert to the absorb voltage which is lower than setpoint. The Absorb voltage is usually low enough to stop gassing.
Most of the good controllers with Mppt have set points that are adjustable with a manual adjustment or by software that runs on a computer.
Mppt is used to enable the controller to take advantage of the panel voltage being greater than the battery voltage. Most controllers with Mppt need the panel voltage to be <>2 volts or higher than the battery to make Mppt work....The greater the difference between the panel voltage and the battery the greater the Mppt boost will be. There is a point where the difference/panel voltage will be too high and then you will have a loss of efficiency.
When the panel voltage is not over that 2vdc point then most of the controller's with Mppt will act like a regular Solar charger...
Jim
If a controller has the setpoint feature then when the setpoint voltage is met which is the output of the controller to the battery then the controller will revert to the absorb voltage which is lower than setpoint. The Absorb voltage is usually low enough to stop gassing.
Most of the good controllers with Mppt have set points that are adjustable with a manual adjustment or by software that runs on a computer.
Mppt is used to enable the controller to take advantage of the panel voltage being greater than the battery voltage. Most controllers with Mppt need the panel voltage to be <>2 volts or higher than the battery to make Mppt work....The greater the difference between the panel voltage and the battery the greater the Mppt boost will be. There is a point where the difference/panel voltage will be too high and then you will have a loss of efficiency.
When the panel voltage is not over that 2vdc point then most of the controller's with Mppt will act like a regular Solar charger...
Jim
