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+--- Thread: Mini Solar Charge Controller (/thread-440.html)
RE: Mini Solar Charge Controller - srinivas - 07-07-2022
I am looking to use Solar panel for my home in order to save some money from free energy. I was searching from last few days, but still unable to resolve which one shouls I use and why?
Please specify Solar panel too with size as I would buy 10 AMP Solar charge controller because it is cheap.
Does this will automatically connects to battery when their is no sunlight. please clearly guide me as I am interested to use small led lights and a mini fan.
RE: Mini Solar Charge Controller - admin - 02-18-2026
Since you want to run small LED lights and a mini fan, a small 12V solar system is enough.
Because you are buying a 10A charge controller, you should use:
12V 100W solar panel
12V 50Ah or 75Ah battery (deep cycle recommended)
10A PWM charge controller
A 100W panel is perfect because:
10A controller × 12V ≈ 120W max panel size.
So don’t buy more than 120W panel with that controller.
Yes, the system automatically uses the battery at night.
During daytime → panel charges battery.
At night → battery powers your lights and fan.
Just make sure:
All components are 12V
Battery is connected before panel to controller
Use proper wiring thickness
This setup is good for 3–4 LED bulbs and one small DC fan.
RE: Mini Solar Charge Controller - ramesh - 02-18-2026
For that, you need at least: 12V 60Ah battery (better take 100Ah for safety)
Panel: Minimum 100W panel recommended.
Important:
Cheap 10A PWM controllers are okay for small systems, but MPPT is better (more efficient). If budget is tight, PWM is fine.
And yes — when there is no sunlight, the battery supplies power automatically. That’s how solar systems work.
RE: Mini Solar Charge Controller - Greencorner - 02-18-2026
You can use a 12V 100W solar panel with your 10A charge controller, as it safely supports up to around 120W.
Pair it with a 12V 75Ah–100Ah battery to run small LED lights and a mini fan for a few hours at night.
Yes, the battery will