Can You Connect Solar Panel Straight To Battery. The same voltage of 138 from the charge controller can charge all the battery connected in parallel. Solar panels rated higher than 5 watts must not be connected directly to a battery but only through a solar charge controller to protect against over-charging.
If your panel voltage is not enough you will need to add a second solar panel in series to the first. Exceeded for minutes to hours - I used to connect a 60W solar panel to my car battery every few months and let it charge to equalize itI dont recall the peak voltage but it went over 155 for hours. The inverter is the one responsible for converting the DC to AC.
The maximum voltage that you need AT the battery pack is 42Vcell or 126V in your case.
The Guardian 12V charge controller has an 8mm input so you can connect Goal Zero solar panels to it. The fuse rating is specified in the solar panel datasheet or on the sticker at the back of the panel. A 12V battery needs only 12 volts at most 144V to charge. Originally posted by kebang View Post.
