One Solar Panel Two Batteries

The two banks are charge separately using the same controller and solar panels.

One solar panel two batteries.

Looks to me you ll be charging them in series because that s the way they ll be connected. Most solar charge controllers will only allow you to charge one battery. But i d suggest you use a proper charger circuit to do it. In addition the two parallel connected solar panels will charge the batteries quickly and power up extra load.

To power a dual battery system you ll need to connect the panels in parallel. You haven t said what kind of batteries they are and that matters as to how they should be charged. Notice the two discrete battery connection points on both sides of the solar array connection on the back of the above controller. You can charge two batteries together you can charge them either in series or in parallel.

I have two 12v lead acid batteries on my boat. 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. 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.

If both panels are rated at the same maximum voltage then you ll get maximum output. You can easily start with one battery and add a second bank later. There are a few charge controllers that have now added the default option of having two battery banks. 12v charge controller and inverter system.

This parallel wiring configuration is needed in case of 12v system i e. However there s one consideration. 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.