Besides the above components you need a few more things like Copper Wire, MC4 Connector, breaker, meter and fuses, etc. In the next few steps I will explain in details how you can choose the above components according to your requirement. Note: In the pictures I have shown a big solar panel of 255W @ 24V, two batteries of 12V @ 100Ah each, 30A @ 12/24V PWM solar charge