Hey everyone, I’m new to the site and hoping some people can enlighten me. I have two 100w solar panels (Renogy) wired in series, 20amp MPPT charge controller (Renogy), 100ah Lithium Iron Phosphate battery (Renogy), 300 watt pure sine inverter, and a fuse block for my led lights and 12 volt plug.
I have my charge controller battery load terminal positive wire running into a kill switch, then to a 20amp inline (Renogy) fuse ending on the + battery terminal. I have the negative running to the battery - post. I have a positive wire running from my battery, kill switch, 50amp fuse and into the 300w inverter. Black wire from battery to inverter. Inverter grounded to van chassis (paint scraped to expose bare metal). The battery is grounded to the van chassis as well, separate location. I have my fuse block positive and negative wire running into the charge controller load terminals.
Heres where my problem starts, I connected everything besides the solar panels, flipped the switch and woot woot, power! The charge controller was reading 13.00 and the inverter came on no problem. With the system on, inverter turned off, I took the negative wire from my solar panels wired in series and placed the wire in the charge controller negative terminal and I got a pop, charge controller shut off. I checked the system and my 20amp inline fuse blew, black in the middle.
I rechecked my wires coming from the panels = all good.
I rechecked my wiring on the components = all good.
I called Renogy, explained the set up and the tech thought maybe there was a fault in the charge controller, maybe when I inserted the negative wire into the charge controller in made connection to another wire through a defect in the terminal. I used a volt meter and power was reading 13.0 when I touch the battery terminals on the charge controller. Then touched the solar panel terminals and received a zero reading.
I’m looking for any suggestions or tips on a remedy before I have to mail this charge controller back. Thanks in advance everyone.