Review on ⚡️ Renogy 20A On-Board Battery Charger for Flooded, Gel, AGM, and Lithium Batteries: Multi-stage Charging by Gary Perry

Spent the whole weekend rewiring my camper to make room for this charger and all about #4 -Connect wire and custom cables. I finally did everything and after all this work and money the device doesn't work. Doesn't turn on, doesn't pass on a signal. It goes back to Revain. I noticed that another reviewer had an issue with the "on" switch. This could also be an issue with my device, but how do I know about it with totally useless incomplete instructions that say nothing about the requirements to install the device? Save time and money and skip this thing. Absolutely ridiculous.