Solar Charge Controller
Looking at solar and seeing different options for controllers. What's the difference between PWM and MPPT?
Forum Discussion
wbwood wrote:
So the 190 and 200 watt panels mentioned are per panel or all together?
If I purchase a couple of 100 watt panels (not permanently mounting them), then a pwm will suffice?
Expected amps from a 100w panel is about 6.3a aimed at a high sun, so total for two is 12.6a. You need a 20% margin above that in controller amps rating to allow for when the panel exceeds its ratings. So another 2.6a is 15.2a.
You could go with a 15a controller or a 20a for nearly the same price. Any old eBay 15 or 20a controller will do the job for under $15. BTW don't get sucked in by claims of MPPT on those, they are actually PWM. Cheapest MPPT is about $100 by comparison (Eco-Worthy 20amper)
