The solar panels:
The solar panels I choose for this project are the UNI-Solar flexible PV panels.
They will slam onto just about any flat surface but are best made for use on corrugated metal roofing.
I have a 4 panel array of 24v DC current solar panels, 3 are 124 watt , the last one is a 144 watt for an array total of 516 watts @ 24 Volts DC.
I went with a 24v system rather then a 12V because a 24V system charges twice as fast as a 12v would.
This principal carries forward as a 48V system charges faster then a 24v.
But the drawback is that you need to supply a battery bank large enough to accommodate the voltage you want.
So a 24v system can be banked with either four 6v batteries or two 12v volt batteries in series to create the 24v. You can use the very large 24v batteries and get by with one battery but there not very efficient at all and have short life spans.
The Charge Controller:
This is the soul and electronic heartbeat to any solar or wind system. Its a must have.
This is the device that connects everything together and brings the power from your solar and or wind power into the battery bank for energy storage.
I went with a 60 AMP controller complete with LED voltage regulator and versatile from 12V, 24V, or 48V systems. It excepts both wind turbines and solar panels with a DC current source for a hybrid system.
This allows you to produce electricity day and night.
Changing the incoming voltage is as easy as sliding a fuse out and repositioning it on the board.