Review on ⚡ 12V-36V Digital Low Voltage Protector Disconnect Switch with Over-Discharge Protection Module for Lead Acid and Lithium Batteries by Braden Douville

Okay I wanted to use this on a 24vdc solar system. I would like the fan to only turn on when charging flooded batteries as they will then give off gas and vapor. It's easy to program to the voltage you want, so that's good. Lots of relays to control the low current (2 amp) fan. Here's my problem. The output terminals of this controller provide a voltage equal to the supply voltage of the board. In other words, if I connect it to 24V DC, it outputs 24V DC when it's on. I have a 12V fan. I have 12V power for the fan. I just wanted a relay contact that closes when the programmed voltage is reached and opens when the voltage drops. Yes, I bought the wrong controller and it's not the manufacturer's fault. So I unsoldered the relay from the board, cut off some of the traces and rerouted them. Soldered the relay back on. The problem is solved. Now it's a dry contact NO relay controller. Now works exactly how I want it. Maybe the people who made it will make another version that works the same as it does now. I think there is a market for that.