Solar panels
- Thread starter billyfish
- Start date
noelex
Well-Known Member
That is a PWM (not MPPT) controller, but yes, it will accept more than one solar panel, providing the following conditions are met:
The solar panels can only be wired in parallel.
Both solar panels will need to match your battery voltage. So, nominally "12V" panels if you have a 12V battery. These typically have a Vmp of around 18.5V and a Voc of around 22V.
The total current output of the panels needs to be less than the rating of the controller. Ep sell both 10A and 20A versions. Add the Imp of the two panels together, and this needs to be less than the current rating, or you can use the wattage rating of the panel. For example, the maximum wattage for the 10A version of the two panels added together should be 10x12V or 120W.
The solar panels can only be wired in parallel.
Both solar panels will need to match your battery voltage. So, nominally "12V" panels if you have a 12V battery. These typically have a Vmp of around 18.5V and a Voc of around 22V.
The total current output of the panels needs to be less than the rating of the controller. Ep sell both 10A and 20A versions. Add the Imp of the two panels together, and this needs to be less than the current rating, or you can use the wattage rating of the panel. For example, the maximum wattage for the 10A version of the two panels added together should be 10x12V or 120W.
billyfish
Well-Known Member
Oh I don't know how to copy text from one place to another but the panel spec is the one paulrainbow is selling 3 posts ago
noelex
Well-Known Member
OK,I will take a look.
noelex
Well-Known Member
That panel is fine with a PWM controller, provided you have a 12v battery bank.
As it is 50W, if your other panel is less than 70W, it is fine, assuming yours is the 10A model or 190W if it is the 20A model. It would be worth checking the maximum current capacity of your controller just in case it is something different. Google only references 10A and 20A versions, but there may be other options available.
I could not see any markings on the photo, but the maximum current capacity will be listed on the controller somewhere, or at least in the instruction manual.
As it is 50W, if your other panel is less than 70W, it is fine, assuming yours is the 10A model or 190W if it is the 20A model. It would be worth checking the maximum current capacity of your controller just in case it is something different. Google only references 10A and 20A versions, but there may be other options available.
I could not see any markings on the photo, but the maximum current capacity will be listed on the controller somewhere, or at least in the instruction manual.
billyfish
Well-Known Member
Thank you. Very helpful. 1 have 3 x 12volt 100amp hr. The panel i have is , from memory only 20w. Which is why I need a bit more but don't want to clutter up the coach roof.
