12v battery/ 12./24v MPPT ~ 24v PV Panel
This question troubles the Old and Slow mind. I have a 24v/120w Cynergy PV panel. I would like to use it for duel purpose. For my 24v e/scooter and my 12v RV, not at the same time. The MPPT states (15...
Forum Discussion
No.
First off ignore load limit. It is not normally used on RV solar setups and does not apply to sizing. I don't think you use the load terminals on your LandStar either. Typical application is solar lighting.
The specs just mean on the 40 amp unit you need more panels in parallel and fewer in series to stay under the total Voc. The Voc does not determine the power capability of the unit, just the panel wiring. The capability is determined by total watts it can handle, and amps it can put *into* the batteries.
A higher Voc buys you more flexibility in how you can wire your panels together, but that's about it (unless Voc is so low it is below the Voc rating of a *single* panel you want, which is unlikely).
For controller sizing purposes, it is easier to just think of the MPPT panels all wired in parallel.
Jim
First off ignore load limit. It is not normally used on RV solar setups and does not apply to sizing. I don't think you use the load terminals on your LandStar either. Typical application is solar lighting.
The specs just mean on the 40 amp unit you need more panels in parallel and fewer in series to stay under the total Voc. The Voc does not determine the power capability of the unit, just the panel wiring. The capability is determined by total watts it can handle, and amps it can put *into* the batteries.
A higher Voc buys you more flexibility in how you can wire your panels together, but that's about it (unless Voc is so low it is below the Voc rating of a *single* panel you want, which is unlikely).
For controller sizing purposes, it is easier to just think of the MPPT panels all wired in parallel.
Jim
