One Solar Panel Two Batteries

Most solar charge controllers will only allow you to charge one battery.

One solar panel two batteries. Notice the two discrete battery connection points on both sides of the solar array connection on the back of the above controller. The two banks are charge separately using the same controller and solar panels. Following this example where there are two 12v 200ah batteries connected in parallel we will therefore have a voltage of 12v volts and a total capacity of 400ah ampere hour. The parallel connection of two identical batteries allows to get twice the capacity of the individual batteries keeping the same rated voltage.

One at the front for the trolling motor 80 ah and 2 smaller batteries in parallel at the rear for electronics 30 35 ah combined. Connecting two solar panels in parallel. For this reason two or more solar panels as well as batteries each of 12vdc are connected in parallel. I want to put a solar panel on my garage so i can hook the batteries up when i get back from the lake to recharge them and to keep them maintained.

Looks to me you ll be charging them in series because that s the way they ll be connected. I have two 12v lead acid batteries on my boat. But i d suggest you use a proper charger circuit to do it. You can charge two batteries together you can charge them either in series or in parallel.

If both panels are rated at the same maximum voltage then you ll get maximum output. However there s one consideration. To power a dual battery system you ll need to connect the panels in parallel. Connect the negatives to the negatives and positives to the positives.

In addition the two parallel connected solar panels will charge the batteries quickly and power up extra load. 12v charge controller and inverter system. You can easily start with one battery and add a second bank later.