Hi brulaz,
Sorry. You DO want fancy. The Grape 40 amp unit is the KING of pwm controllers with adjustable voltage set points and a battery temperature sensor. It will handle 480 watts of panels. It is readily available (Home Depot) and inexpensive. I think MrWizard is using one.
The cheap MPPT units either are lying (i.e. not MPPT at all), or have an inductance coil that is nearly a joke.
My "real" MPPT started charging at 5:45 a.m. and by 8:20 was doing 7.5 amps @ 14.3 volts. Date is May 10. Location is 50.444593, -104.529741
brulaz wrote:
So if this ever flies, a PWM with max input V of over 55V is what I need. Or go with a cheap mppt. Neither has to be fancy
