Morningstar Charge Controllers are a must for any size of solar electric or wind system. A controller could make the difference of replacing your battery or a whole battery bank every two years or every 10 years. Without regulating the charge you run the risk which is a very high risk of over charging your batteries on a daily bases. With wet cell lead acid type you will boil the water out making the lead plates hard shorting the life of the battery. AGM or GEL don�t have water but you can over charge these batteries and end their life in just a very few over charges.

A solar controller of a good breed will allow you to set how often you would like your batteries equalized if at all. Wet cell lead acid batteries require to be equalized every so many months. However AGM and GEL should never have an equalizing charge put on them.