This installation was completed in April of 2024. The customer contacted me with modest power needs.  The customer had a small travel trailer and simply wanted additional battery and solar capacity over what the factory had provided.  As the installation got closer, the customer also asked about adding a small inverter so the 120 volt outlets in the trailer would be powered when they were not connected to a shore source.  I came up with a simple system design and the customer accepted it.  We set the installation date and the customer brought the trailer to me.

The installation was completed in two days. I added two REC 365 watt solar panels to the roof of the trailer.  The panels were paired to a Victrom SmartSolar MPPT 100/50 Solar Charge Controller.  This more than double the original solar capacity of the trailer (the original panels and solar charge controller were removed).  I also added two Battle Born 100 amp hour lithium batteries.  The original lead acid batteries were disconnected from the system.  The new batteries were mounted in the pass through storage compartment at the front of the trailer rather than on the A-frame of the trailer like the original set up.  I added a Victron Phoenix 12/1200 pure sine wave  inverter with a Kisae Energy TS 15 transfer switch.  The transfer switch was installed in the circuit that powered the 120 volt outlets in the trailer.  The transfer switch was spliced into the circuit behind the main power panel and then I extended the connection from the transfer switch to the Phoenix inverter that was mounted in the front pass through storage area.  I added a VE Direct Bluetooth Dongle to the inverter to allow the customers to control it from the Victron Connect app.  I wired the inverter to the new batteries via a Lynx Distributor.  I also added a BMV 712 shunt based battery monitor to the battery bank.  The installation was pretty simple and straight forward.  The most difficult part was finding the best path for the extension from the Kisae transfer switch to the Phoenix inverter.  This entailed fishing wire in the covered  underbelly of the trailer.