Sell my 70W panel or add it to my 120W?

TantoTrailers

Well-known member
I just bought a 120W fabric folding solar panel with a 20A charge controller to replace my 70W panel of the same type. The 70W cost me about as much as the 120 did and I know I will get nothing for it so is it worth connecting them both up to the same controller in parallel? I think I can make it work space wise in my tongue box for storage.

70W: https://www.amazon.com/ACOPOWER-Fol...s=gateway&sprefix=acopower+70w,aps,175&sr=8-1

120W: https://www.amazon.com/dp/B07RRNCSJN/ref=cm_sw_r_cp_tai_saiCDb6JQ630W
 

luthj

Engineer In Residence
What is the max power voltage (Vmp) for the panels? If they are similar, then putting them in parallel to the same controller is doable.
 

john61ct

Adventurer
Best to have all panels going to a given SC, especially if MPPT, be the same model.

Constantly seeking the perfect voltage point with unmatched ones will reduce or even eliminate the efficiency improvement over a PWM setup.

But if on a low budget, that may not be a critical issue.
 

Forum statistics

Threads
185,527
Messages
2,875,534
Members
224,922
Latest member
Randy Towles
Top