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12V May 2026

Japanese RV Upgrade

RV — Power System Upgrade

A 12V power system upgrade for a Japanese-import RV — a 300Ah Bluetooth battery, distribution bars, a safety switch, a Renogy 2000W inverter with transfer switch, a 55A LiFePO4 charger, and an AC transfer box, all fit into the coach's under-floor compartment.

Under-floor RV compartment power system upgrade with inverter/charger, Webasto heater, battery bank, and fuse panel wired together

Components in This Build

  • 300Ah Bluetooth battery
  • Distribution bars
  • Safety switch
  • Renogy 2000W inverter with transfer switch
  • 55A LiFePO4 charger
  • AC transfer box

This RV came in for a full power system upgrade, all built into the existing under-floor compartment. A 300Ah Bluetooth battery is the heart of the system, monitored remotely and distributed through a set of bus bars, with a safety switch for isolating the bank when needed.

A Renogy 2000W inverter with a built-in transfer switch handles AC output and automatically switches over when shore or generator power is available, backed by a 55A LiFePO4 charger to keep the battery topped off. An AC transfer box rounds out the system, letting the coach cleanly switch between power sources.