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How to Choose the Right RV Power Inverter?

It depends on what you're going to use it for. What electrical equipment is in your RV

At first glance, these pure sine wave power inverters are not cheap. But in terms of efficiency and the dollar per watt cost compared to what you get out of them, they're cheaper than the less-efficient units.

 

You may still find low-tech, square-wave inverters for sale. They're grossly inefficient, using most of the electricity they consume just to run themselves. Their simple electronics lead to other problems, cannot bear your rv applicance loads, these inverters may let you angry and mad.
Do you want to use a Microwave or multiple appliances at the same time? You'll need over 1,500 watts capacity. You'll also need at least 200AH (Amp Hours) of battery capacity (to run a microwave for brief periods). You'll need more battery reserve for longer periods and heavier loads. If you'll be cooking full dinners for 30 minutes, you'll need a 400AH battery capacity.
Just want to charge phone or computer? Usually, a 150watt to the 300-watt inverter is enough.

Buying an RV power inverter there are two ways:
One. Get a good, efficient, larger power inverter and feed the whole rv loads. The best ones are 90+% efficient and no longer need to be matched to the loads. They'll do nearly as well running a small load as a big one. Incredible but true.
Two. If you don't need a big inverter, consider having one or more smaller power inverters and use the size appropriate for the job at hand.
Maybe have an 800W for everything except a microwave. Perhaps a 300W for TVs, VCRs, stereos and satellite systems. A 150W-300W palm-size may operate a small TV, charging the phone, computer. A palm-size inverter can be easily plugged into RV or tow vehicle cigarette lighter receptacle and can bring freedom to the camp-ground bound.
COST: The cost of power inverters, in general, has gone down over the years and they are more affordable now than they have ever been. But you need to compare models carefully and be aware that the cheapest unit may not be the best 'deal'.A good quality, inverter made specifically for RV use may cost even more.
RV BATTERIES: Technically, you can run anything you want from an inverter -- if it's big enough and you have enough batteries and if you have a way to keep the batteries charged. But an RV, while it may be a home, is not a homestead. Space and weight are considerations. So practically you woun't be able to run your air conditioner on a power inverter. And you probably won't be able to run everything at once even with a large RV power inverter.

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