Testing the ??MPPT ?? CMTP02 Controller UPDATE

RoyB wrote:
What am I hearing here... I know I need lets say 14.4VDC @ 20AMPS per battery to be able to recharge that battery from a 50% charge state to a 90% charge state or more in a three to four hour time frame..

I think I am hearing that the PANELS are usually rated at 5-7AMPS of usable DC current available which is a big killer of getting the batteries back to a 90$ charge state but by running higher DC voltages from the panels will produce alot more current than the rated 5-7AMPS and possibly end up with 14.4VDC charging DC Voltages at a higher DC Current rate.

i.e. the controller will run at max with much the higher DC Voltages coming from the panel and produce higher DC current then using BUCK BOOST couple this back to the 14.4VDC at a higher DC current. I know I am not explaining this right but is something like this going on with the controller you are testing.

My recent planning is looking at two 100WATT or 120WATT portable panels coupled with a permanent 120WATT panel mounted on my POPUP roof. The normal rated DC output of the these panels specs using the standard type controllers will not produce a usable 14.4VDC at a high enough DC CURRENT to re-charge my batteries in the short 4-5 hours of the panels being in high sunlight in ONE DAY...

Think I am hearing something different now from these tests being performed.

Roy ken

Besides the advantage of the MPPT control, a user will get usable current from the modules on the shoulders of that 4-5 hours a day. My 235w module is still trickling at sundown.