ktmrfs
Explorer II
Joined 20 years ago
User Profile
User Widgets
All Activity
Re: Inverter Output Power Question
KenS999 wrote: What gauge wire would you recommend between 12v batteries and inverter using a 2000 watt inverter? Length of cable run should be under 10 ft. A 900 watt microwave will be the largest appliance I will be running on the inverter. Thanks, Ken go with 4/0 welding cable for that length and current. Voltage drop is your enemy. welding shop can make up cable and lugs for you.1.7KViews0likes0CommentsRe: Ok to run shore power without battery?
Boon Docker wrote: His 12.9v reading from the converter (with no battery) is 14.32v RMS. how do you know that? If the converter is putting out 12.9V DC with little or no ripple the RMS voltage is 12.9V Unless you LOOK at the output waveform and KNOW what kind of meter is used you don't know what the RMS value is.2.3KViews0likes0CommentsRe: Ok to run shore power without battery?
144Grayling wrote: Thanks for all the information. The battery is a 12 volt lead acid RV deep cycle battery from Les Schwab. No reason to think it’s not what it says it is. As far as I know the only 12v functions in the trailer are lights, bathroom exhaust fan, radio and propane alarm. All those are fine on what’s coming out of the converter now: 12.9v No slide out, no hitch jack. Checking the panel it also has a few other 12v circuits that we don’t use ( dont need the water pump since we’re hooked up permanently, and the furnace, since we use electric heat instead of propane.) And it says the hood fan is 12v which I didn’t know. So everything we need is working fine off the converter and shore power. I don’t know why the converter was overcharging the battery to the point of boiling, but if it can go without a battery I really don’t need to care about it. I suspect that I killed the battery by leaving it outside uncharged over a couple of winters and that’s my bad. But, again, if I don’t need a battery in the system I’m ok. Still getting mixed opinions on that. 12V is needed for a propane/electric fridge (even on shore power) water heater (even on electric) usually for propane and sometimes CO detector1.9KViews0likes0CommentsRe: Ok to run shore power without battery?
144Grayling wrote: The 12.9 was with the battery disconnected. (In fact the battery was at the NAPA shop miles away??) Looks like one vote for “it’s ok to run without a battery” and one vote for “you should put in a battery” Anyone else wanna break the tie? And if I really do need a battery to protect the system should it be a deep cycle RV battery or a plain old car battery, knowing it will never be without shore power. high quality working converter likely no problem running w/o battery. low quality converter or not regulating voltage no battery likely issue. The battery acts like a 12V load and filter. my opinion, just install a 12 marine or car battery since you run with shore power. will give protection for other more valuable stuff in the trailer, fridge, wh, furnace, lights etc.1.1KViews0likes0CommentsRe: Inverter draw from battery for residential fridge
look at the fridge nameplate and look for either the power in watts or max current. If it lists max current multiply by 10 to get inverter draw from 12V If it lists watts current =watts/12 that will give you a pretty close estimate of max power draw from the batteries. now to get run time you will need to take into account the duty cycle of the fridge, what % of the time the compressor is running.647Views0likes0Comments
Groups
Bucket List Trips
Bucketlist destinations you just can't miss. Which spots stick with you?Jan 18, 202513,487 Posts Chefs on the Road
Campground recipe recommendations, restaurants, and more!Jan 01, 20252,135 Posts Fifth Wheel Group
Interested in fifth wheels? You've come to the right spot.Jan 29, 202519,006 Posts Motorhome Group
Join in here to discuss all things motorhomes.Feb 03, 202538,706 Posts RV Newbies
We all start out new. Share lessons learned or first-time questions!Jun 15, 20174,026 Posts
