Forum Discussion

Rbertalotto's avatar
Rbertalotto
Explorer
Aug 04, 2013

Solar Panel Charge Issues..Trimetric 2025RV....HELP!

I thought this solar stuff would be easy........NOT! I have a 120w Solar Cynergy Polycrystalline solar panel on the roof of my TC.....7' of #10 wire to the controller....18" of #10 wire to the shun...
pianotuna's avatar
pianotuna
Nomad III
Aug 04, 2013
HI BFL13,

Let's ask the OP for the specifications from the "name plate" on his panel? If it is operating at 27 volts then MPPT make sense. If, on the other hand it is a 12 volt (17 volt) panel then a decent PWM makes sense.

I know you hate watts but his amperage is going to be desperately low with PWM if voltage is 27 (about 4.4 amps). With MPPT that may more or less double to 8 amps.

BFL13 wrote:
PT, the guy has only one 120w panel--whyinhell would you tell him to get MPPT!!!!

About Technical Issues

Having RV issues? Connect with others who have been in your shoes.24,380 PostsLatest Activity: Apr 16, 2026