Switching safely between shore power and the battery is the hardest part of an RV inverter install, and this unit handles it with a built-in automatic transfer switch. The listing says the inverter automatically changes between external 120V AC and battery power, which removes the risk of back-feeding a campground pedestal. Few units at this price offer that.
The output is pure sine at 2500W continuous with 5000W of peak surge, and the listing states efficiency of up to 91 percent. At 2500W, a full load draws about 235A from a 12V bank, so heavy cable and a large lithium battery are required. That is a size for a coach with a microwave and a coffee maker.
It sits at the middle of the price tiers, which makes the transfer switch feel like a bargain. The brand is not named, so check the seller's warranty before you buy. For a coach with a proper battery bank, it is the most complete package in this guide. Fuse the battery cable close to the battery, keep the run short and mount it in a ventilated bay. Test the switch once a year with a known load.
What works
- Built-in transfer switch prevents back-feeding
- Pure sine output at 2500W continuous
- Efficiency stated up to 91 percent
- Middle price tier for a unit with a switch
Watch out for
- Brand and warranty need verification
- Full load draws about 235A at 12V
- Needs a large lithium bank
Spec sheet
- Continuous output
- 2500W
- Peak surge
- 5000W
- Waveform
- Pure sine
- Transfer
- Automatic transfer switch
- Efficiency
- Up to 91 percent





