RV power inverters convert DC power from a battery source into AC power for small appliances. While an inverter won’t replace a generator or a city power connection for heavier electrical needs, inverters are an ideal solution for a bit of roadside current or AC power while driving down the highway.

Wattage

In considering a RV power inverter purchase the first question has to be, just how much power do I need? A small inverter pumping out 75 to 125 watts may be plenty for charging a laptop, a mobile phone, or even powering a few compact florescent lights, but it won’t deliver the wattage needed for your flat screen television, or the coffee maker. A 300 to 400 watt inverter may power a television, a desk fan, and several CFLs, but it can’t run your microwave. Inverters producing 600 to 800 watts are suitable for a range of small appliances. Inverters producing 1200 or more watts will power small heaters, refrigerators, or even a window air conditioning unit.

Plug-in Inverters

Small inverters don’t require a permanent connection to the RV electrical system. Inverters producing up to 400 watts can be plugged in to any 12-volt power jack. Some inverters in the 600 to 800 watt range also come with power jack plugs, but generally inverters over 400 watts are better suited for hardwiring into your power station.

Hardwired Inverters

There are several factors in adding a hardwired inverter to your RV electrical system. Inverters work best when close to the battery. The heavier the wire the better the connection. Inverters get hot and require ventilation. Inverters should never be mounted in the battery compartment itself. Where they may be exposed to battery gases. Consider purchasing an inverter with switching, allowing a direct connection to your RV AC wiring and outlets.

Wave Form

Inverters produce two forms of waves. Lower priced inverters deliver a modified sine wave perfectly suitable for many appliances but potentially problematic with some electronics. Higher priced inverters produce a pure sine wave more like the wall power in your home. If you value your delicate electronics you may want spend a bit extra for pure sine. .


Battery Considerations

Because power inverters draw power from your RV’s house batteries, make sure your batteries are up for the job. A large inverter can drain a battery quickly when powering multiple appliances. Using your inverter power while driving down the road is different, as your batteries are constantly charging off your vehicle’s alternator. Always attach your inverter to your house batteries, and never to your vehicle battery.

Selecting the right RV power inverter for your motorhome or trailer will assure that you always have the electricty you need.