Voltage vs. PWM controller & wire size
Ok, there is a recent thread out there MPPT vs. PWM and some post were a little confusing to me. Instead of hijacking his thread I started a new one. My set up is two 208 watt Sony panels with 28....
Forum Discussion
Calkidd wrote:
Ok, another question concerning this. Correct me if I am wrong, but from what I understand the input amperage going into a PWM charge controller will be the same output amperage?
Yes
I am trying to learn here so bear with me. If I purchase a '12 volt' panel this would be more beneficial for my PWM, correct? So let's take for example a 140 watt Kyocera panel giving the following Specifications:
Voltage at Max Power (Vmpp) 17.7 Volts
Current at Max Power (Impp) 7.91 Amps
Open Circuit Voltage (Voc) 22.1 Volts
Short Circuit Current (Isc) 8.68 Amps
This panel produces just shy 3/4 of an amp more than my current Sharp panels(see below).
Maximum Power Voltage (Vpm)* 28.71V
Maximum Power Current (Ipm) 7.25A
Open Circuit Voltage (Voc)* 36.3V
Short Circuit Current (Isc) 7.99A
Other than the voltage being higher what benefit is this Kyocera panel using a PWM controller over what I already have available to me?
The benefit is a smaller footprint and hence less roof space needed for virtually all RVers.
But your posted that roof space is not a concern for you and based on that little benefit for the 12V panel.
Size and weight can be considerations for others.
Please excuse me if this may be redundant it just hasn't clicked for me yet.
