Cheap China Solar Controller Failure
For a couple days been noticing higher than the 14.6 voltage,.....going to 15, and even 15.5,....I knew something was not right. The next day it was showing 16, then quickly went to 17+.......I quickl...
Forum Discussion
Charge Wizard... give us a basic cost analysis example of cheap chinesium PWM VS MPPT charge controllers at current $1.20 a watt panel prices at Solar Blvd, and amperage yield.
Assume 200 watt at $240, 240 watt at $272, 280 watt at $318 combined paired panel sets in 12v hooked in series for MPPT, versus parallel for PWM.
Compare a basic Ebay Solar 30 30 amp PWM Chineseium charge controller for $30 to the most basic 20 amp MPPT "for real" MPPT with a buck coil in it charge controller for $85.
What kind of amps are we talking about in these two scenarios, gained by MPPT for an extra $55 for the charge controller. Assume wiring is identical in both cases, for ease of calculations, and that roof real estate is not an issue. This should be good for 2 GC-2's, 4 GC-2 might be a bit light at 280 watts, and a pair of T-1275's would be fine on the 280 watt set up, in most cases.
What about scaleability? Will the MPPT handle the additional voltage if you want to add a third panel, voltage wise? Can it handle 66 69V input from the panels?
What kind of amperage yields are we talking about on cold mornings, and the gain in amps, between the two systems, with MPPT for the extra $55.
Then up it with comparison for good american PWM and good american MPPT charge controller prices instead, for the fashion label conscious.
Assume 200 watt at $240, 240 watt at $272, 280 watt at $318 combined paired panel sets in 12v hooked in series for MPPT, versus parallel for PWM.
Compare a basic Ebay Solar 30 30 amp PWM Chineseium charge controller for $30 to the most basic 20 amp MPPT "for real" MPPT with a buck coil in it charge controller for $85.
What kind of amps are we talking about in these two scenarios, gained by MPPT for an extra $55 for the charge controller. Assume wiring is identical in both cases, for ease of calculations, and that roof real estate is not an issue. This should be good for 2 GC-2's, 4 GC-2 might be a bit light at 280 watts, and a pair of T-1275's would be fine on the 280 watt set up, in most cases.
What about scaleability? Will the MPPT handle the additional voltage if you want to add a third panel, voltage wise? Can it handle 66 69V input from the panels?
What kind of amperage yields are we talking about on cold mornings, and the gain in amps, between the two systems, with MPPT for the extra $55.
Then up it with comparison for good american PWM and good american MPPT charge controller prices instead, for the fashion label conscious.
