I purchased a 1000W Pure Sine Wave Inverter to be able to run our IMAC computer and LCD TV while off grid. I wanted a Pure Sine Wave Inverter to give our sensitive electronic items clean , stable power. The unit has performed well for 18 months now with almost continuous use from our IMAC even when plugged in to the shore power. I’ve actually come to trust it more than shore power. The way I have installed the inverter it is completely isolated from the regular AC electrical circuits in the RV.
Several key things were necessary for a good installation.
1. Proximity to the batteries.
By being close to the batteries the inverter is able to get maximum current when needed without losing power in the cabling. Also there is less chance the cables would heat up under heavy loads. I have around 18 inches of 2 gauge battery cable and they never feel even warm.
2.Isolated from the batteries air space.
This one was a tough one for me. You want the inverter in a different area than your batteries for a couple of reasons. You don’t want battery gases building up around the inverter because it can cause corrosion to the electronics or a spark from the inverter may cause an explosion. My trade-off was to put the batteries in a vented box to have the inverter very close. Also my front storage bay has a lot of air circulation due to the front jack leg holes being open to the air. So far it’s been a good setup with no signs of battery gases in the compartment. This saves me from running wires 2-3 times longer and cutting holes in my fifth wheel basement storage area.
3.Enough battery capacity to run the inverter for a decent length of time between recharges and allow it to be run near max wattage.
I went with 2 - 6 Volt T-105 Trojan golf cart batteries which gave me 225 Amp Hours capacity. An upgrade from the 85AH capacity from the OEM trailer battery. A fair amount for a 1000 watt inverter. Generally we go 2 days dry camping before needing to recharge.
4. Fuse-able Breaker for safety
I installed a 80 amp Breaker right next to the positive battery terminal. This way if a short developed in the inverter or wiring there won’t be a melt down or worse a fire.
5. Air Space around the inverter
The inverter has a built-in fan so that tells us it runs hot. The best thing for long life is to make sure it can stay cool. I installed mine in the front storage compartment with good circulation and air space around it.
Video showing my 1000W Pure Sine Wave Inverter installation
Photos of installation
In conclusion this has been a great upgrade to the RV and allows us to use and charge many of our electronic gadgets and watch a bit of TV with no hookups. One word of advice is you get what you pay for as far as inverters go. I paid nearly $300 for mine, if it is much cheaper it is probably not a Pure Sine Wave Inverter or is poor quality. Also look for one with a remote. Running out to turn the inverter off before bed on a cold boondocking camp trip isn’t much fun.