Go Power TS-30 30 Amp Automatic Transfer Switch

If you've added an inverter to your rig, you've run into the same question everyone does. How do you get inverter power to your outlets without unplugging and swapping cords every time you leave the campground or pull away from the dock? The Go Power TS-30 answers that. It's a 30-amp automatic transfer switch that ties both your shore power feed and your inverter output into one 120-volt AC circuit, then decides which source feeds your loads based on what's actually available.

Here's how it works in practice. When you're plugged into shore power or running your generator, the TS-30 passes that power straight through to your breaker panel. The moment that source goes away, say you unplug to hit the road or the generator shuts down, the switch automatically transfers your outlets over to the inverter. No button to press. No cord to move. It just happens, usually within a few seconds, so your fridge and electronics barely notice the handoff.

That automatic behavior is the whole point. Shore and generator power always take priority, which is exactly what you want. Utility power is effectively unlimited and won't drain your battery bank, so the switch leans on it whenever it's there and only falls back to the inverter when it has to. A built-in generator delay gives your genset a moment to stabilize before the switch hands loads over to it, which keeps you from dropping power during that brief startup window.

We see these go into all kinds of setups. RVs and campers running a solar-and-inverter system are the classic case, but the same wiring logic works on a boat with an inverter and a shore cord, in a van build, or in a small off-grid cabin. Anywhere you've got two 120-volt AC sources and you want them feeding the same circuits without ever touching each other, a transfer switch is the right tool. Rated at 30 amps and 120 volts AC, the TS-30 matches the most common 30-amp shore service, so it drops into a standard 30-amp system without any head-scratching over ratings.

Sizing is worth a quick word. Match it to a 30-amp shore feed and an appropriately sized inverter and everything speaks the same language. Wiring is a two-source affair. One set of input terminals takes your shore or generator feed, the other takes your inverter output, and the switched output runs to the circuits you want covered. Keep your inverter loads on that output side and off the direct shore feed so the transfer actually does what you expect.

Safety is baked in. The TS-30 uses mechanical and electrical safety locks so shore power and inverter output can never be connected to your loads at the same instant. That interlock is what protects your inverter from getting backfed by shore or generator power, which is the kind of mistake that fries hardware fast. It's a compact black box that mounts out of the way near your breaker panel or inverter, and the terminals are straightforward for anyone comfortable with 120-volt AC wiring.

A couple of honest notes. This is the bare transfer switch, not a pre-wired kit, so plan on running your own conductors and following the wiring diagram. It handles the AC transfer only. It doesn't charge batteries, invert DC to AC, or manage your solar. Those jobs belong to your inverter and charge controller. Pair it with an appropriately sized inverter and a 30-amp shore setup and it'll quietly do its one job for years. If you're not comfortable working inside a live AC panel, have an installer handle the hookup. It's simple work, but it's still 120 volts.