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mrwacky's avatar
mrwacky
Explorer
Jun 22, 2013

Inverter issue, we need some power for dry camping

I'm grappling with a problem in need of a solution. For some reason the person who originally ordered our 5er chose not to include an inverter. We do have a propane powered genset and one battery for 12V operation.

Why is this an issue? We travel for months at a time, on this current trip we won't be home until October. But even for shorter trips we don't spend every night plugged into an RV park. We like to pull over when we want and spend many nights at Wal-Mart or other such parking lots. And we like to watch TV and play games, and be able to enjoy the creature comforts without resorting to turning on the genset. Running that genset consumes a lot of propane and I mean a lot. We went through 14 gallons in a matter of a few hours and not only is it a pain in the you know what to chase propane for a refill but it's not free either. I realize I'm rambling here but I wanted to put our story out there when asking for solutions. I'm thinking of buying one of the Harbor Freight 700 watt inverters, it comes with battery cables for clamping on the battery. Running an extension cord from the inverter which would be located in the front genset area to a window, and plugging in the TV/XBOX/DVD player and using the cigarette plug to charge the cell phones and such. Others I have talked to suggest a 1000-1500 inverter. And still others a 2000 to 3000 watt inverter. However, we would need a professional install,a bank of expensive batteries, and we would eat up storage area for the battery bank. The added inverter power would possibly run the coffee pot and microwave but again, at what cost? A pot of coffee brewing would suck up much of the battery charge as would warming something in the microwave. Plus we can warm or make coffee on the stove.

So I hope you see where I'm at and I have a feeling others out there are in the same boat. What have you done or what do you suggest we do?

13 Replies

  • Check the placards on all the components you will be using at the same time, add up the number of watts they will draw and get an inverter with enough capacity to cover the total.

    If you just want to run an entertainment center, I found a 750W unit bought at Costco adequate to run a 30" LCD flat screen, Sat receiver, Blue Ray and small sound system. I mounted the inverter close to the batteries and ran a cord to an outlet I installed in the entertainment center. I took the end plate off the inverter and soldered a couple of wires to the on/off switch terminals, then ran them to a switch in the entertainment center so I can turn the unit on and off from inside. Works great.

    One 12V won't cut it though. We get away with twin 6V's but rarely run the inverter for more than two hours before re charging for a couple of hours. Again, you can use the total load you came up with and your projected usage to come up with your battery needs.
  • Hi,

    I have full timed for many years, and you really do not want a 1000 watt inverter, they are not that energy efficient, becuase of the larger capacitors required to make the higher output amperage, and are fairly expensive to install due to the larger wire, and need for 4 batteries, that extra weight ect.

    A simple 150 - 300 watt inverter will be less than $75, and wire up with #10 wire to a cigarette lighter receptacle. You can fuse it at 20 amps, normally I never exceed that much power.

    With a 150 watt inverter, you can watch TV, DVD, charge a laptop, all at once. 300 watts will just allow a few more things, and discharge your batteries faster.

    My suggestion is to run the generator those minutes you need the microwave, or toaster, coffee maker, ect. It will also help recharge the battery.

    You will need more battery power. I would suggest another group 27 battery, especially if the old one is still working acceptable. Once those batteries fail (expect about 2-3 years from a pair of 12 volt batteries) then replace with a pair of golf cart batteries, and they should last 6 - 12 years with good watering, not leaving them discharged very long, and not going below about 45% state of charge.

    And of course solar power. SunElec.com

    Good luck,

    Have fun camping!

    Fred.
  • Like it or not... one battery just isn't going to do it.
    We have a 2000 watt inverter and 6 6volts...
    You need to have at least 2 - 4 would be better 6volts in order to really take advantage of an inverter...