Solar Costs - MPPT vs PWM
The continued lower price of the larger panels has now dropped the MPPT costs just below PWM for a larger RV solar setup. SolarBlvd Cynergy 3x$200 250W panels 750W $600 SolarHome Morningstar MPPT ...
Forum Discussion
JiminDenver wrote:Are the panels going to be connected in series? The controller just sees the voltage and amps.
What attracts me to the 60 is that as I understand it is that it can track multiple arrays. That means I could run the two 245w monos AND the 230w poly and not worry about confusing the controller with different voltages. Should I have the wrong idea about this, someone tell me now. Otherwise a 45 for the monos and a Eco-W for the poly will do just fine.
However what would it see if the monos are under producing amps compared to the poly? If bypass diodes kick in then that might help.
I'd be concerned about amps produced for a given low light situation. What if the poly produced 3A and the monos 2A? ie For a given uniform light situation could cell technology limit overall power?
But perhaps you're considering parallel? Perhaps then the amps would just add with no degradation for cell technology?
I'm hoping that sometime next year I can do some shadow testing on my panels. ie Take the laptop and/or remote and shading materials on the roof. But if the panels are producing as expected I may just have another glass of wine and let the electrons flow. :B
