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Joined: Sep 2004
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Campfire Ranger
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OP
Campfire Ranger
Joined: Sep 2004
Posts: 17,449 |
I have a toy hauler and will need new batteries soon. It’s a Forest River Vengence, if that matters.
I also need to install an inverter to run a CPAP that I use since Iraq
Any recommendations on batteries to get? To avoid?
Inverters? 750W should do all I need.
“Live free or die. Death is not the worst of evils.” - General John Stark.
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Joined: Feb 2009
Posts: 11,921
Campfire Outfitter
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Campfire Outfitter
Joined: Feb 2009
Posts: 11,921 |
I would by the highest watt pair you can find and look for a solar charging panel.
Better to have it than not and needing it.
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Joined: Sep 2007
Posts: 1,029
Campfire Regular
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Campfire Regular
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Costco RV battery's have a great warranty.
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Joined: Sep 2013
Posts: 18,102 Likes: 34
Campfire Ranger
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Campfire Ranger
Joined: Sep 2013
Posts: 18,102 Likes: 34 |
The last several Costco batteries I’ve bought needed it, too.
Trying wallyworld this spring based on another thread. Bought 6 marine batteries so I’ll have some data in a year or so (grin!)
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Joined: Oct 2007
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Campfire Tracker
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Campfire Tracker
Joined: Oct 2007
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Joined: Jan 2009
Posts: 5,190
Campfire Tracker
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Campfire Tracker
Joined: Jan 2009
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You’ll get more amps by running two 6 bolt batteries in series than you will two 12 volt batteries in parallel.
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Joined: Oct 2002
Posts: 341
Campfire Member
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Campfire Member
Joined: Oct 2002
Posts: 341 |
LiFePO4 batteries are the best on the market but be prepared for sticker shock.
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Joined: Aug 2015
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Campfire Outfitter
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Campfire Outfitter
Joined: Aug 2015
Posts: 13,262 Likes: 3 |
Costco RV battery's have a great warranty.
The last RV batteies I bought at Costco only had a 1 year warranty. The automotive batteries still have longer warranties. The guy at the desk told me they got too many of the deep cycle batteries back for replacement due to owner ignorance or neglect. If you don't keep them charged properly they don't last long.
Let's Go Brandon! FJB
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Joined: Jan 2008
Posts: 904
Campfire Regular
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Campfire Regular
Joined: Jan 2008
Posts: 904 |
check and see if your cpap has a converter that makes 12v to run it. my cpap runs on 12 v so there is no loss going through the inverter if i plug into the rv battery. i put a 12v power point near my head just for the cpap.
i have one of the battery jumper boxes [ the big old fahsioned one] i got at harbor freight and it will run the cpap 2 and a half nights.
you can get deer feeder batteries and wire 2 up to run the cpap for 1 and a half nights.
a marine battery should run it for more than a week.
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Joined: Aug 2010
Posts: 1,559
Campfire Regular
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Campfire Regular
Joined: Aug 2010
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They make 3 sizes. The group 31 last the longest. It goes kinda like this Group 27 = poor Group 29 = better Group 31 = best
However, the group 31 are bigger so if fit is an issue, better measure first. I have my camper set up to hold 3 group 31s. And I buy Deka because they give me the best service.
I sure could go for some $2.50/gal gas and a mean tweet!
NRA Benefactor member, disgruntled. Life member: Firearms Owners Against Crime. Life member: GOA Member: RMEF
TRUMP 2020
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Joined: Sep 2013
Posts: 18,102 Likes: 34
Campfire Ranger
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Campfire Ranger
Joined: Sep 2013
Posts: 18,102 Likes: 34 |
They make 3 sizes. The group 31 last the longest. It goes kinda like this Group 27 = poor Group 29 = better Group 31 = best
However, the group 31 are bigger so if fit is an issue, better measure first. I have my camper set up to hold 3 group 31s. And I buy Deka because they give me the best service.
Where do you put group 24? (Grins)
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Joined: Apr 2018
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Campfire Regular
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Campfire Regular
Joined: Apr 2018
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Costco RV battery's have a great warranty.
And they are junk.
Gun Owners of America Escapee's RV Club Elks Moose
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Joined: Feb 2009
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Campfire Ranger
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Campfire Ranger
Joined: Feb 2009
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Costco RV battery's have a great warranty.
And they are junk. Interstate -
Epstein didn't kill himself.
"Play Cinnamon Girl you Sonuvabitch!"
Biden didn't win the election.
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Campfire Tracker
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Campfire Tracker
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I've gotten 5 years from 6v Costco batteries. I got a 12v power source for my CPAP. I don't have any problems with battery power from my CPAP. I generally run my generator every other day to top off the batteries.
Fight fire, save lives, laugh in the face of danger.
Stupid always finds a way.
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Joined: Sep 2013
Posts: 18,102 Likes: 34
Campfire Ranger
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Campfire Ranger
Joined: Sep 2013
Posts: 18,102 Likes: 34 |
Costco RV battery's have a great warranty.
And they are junk. Interstate - I used to get pretty good service out of Costco marine batteries. The last time I returned one the counter guy was honest. I said they sure don’t seem to last as long as they used to. He said no, not after they changed suppliers. He stated the best thing about the current batteries is their warranty.
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Joined: Feb 2007
Posts: 4,208
Campfire Tracker
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Campfire Tracker
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Posts: 4,208 |
Trojan T-105 6-volt golf cart batteries are the gold standard for serious RV'ers.
But any decent 6 volt pair will be better than 12 volts, so I'd start there. Just ditch 12v.
Also, pro tip: Turn off your CPAP reservoir/hose heating features and the CPAP won't draw much at all.
The DIPCHIT ADD, after a morning of drinking:
You despair, repeatedly, constantly! daily basis? A despair ninny. Sack up, despire ninny.
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Joined: Jun 2020
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Campfire Outfitter
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Campfire Outfitter
Joined: Jun 2020
Posts: 10,840 |
Trojan T-105 6-volt golf cart batteries are the gold standard for serious RV'ers.
But any decent 6 volt pair will be better than 12 volts, so I'd start there. Just ditch 12v.
Also, pro tip: Turn off your CPAP reservoir/hose heating features and the CPAP won't draw much at all.
Pro sleep apnea patient? LOL
FUGK CCP
It’s time to WAKE UP GOD BLESS THE USA WWG1WGA THERE ARE NO COINCIDENCES
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Joined: Jun 2007
Posts: 21,978 Likes: 1
Campfire Ranger
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Campfire Ranger
Joined: Jun 2007
Posts: 21,978 Likes: 1 |
Trojan T-105 6-volt golf cart batteries are the gold standard for serious RV'ers.
But any decent 6 volt pair will be better than 12 volts, so I'd start there. Just ditch 12v.
Also, pro tip: Turn off your CPAP reservoir/hose heating features and the CPAP won't draw much at all.
Out of everything so far, this is the most successful route and there are simple explanations why, especially with an inverter in the equation. The T-105 is also a great battery, just get a fresh pair or make sure they're both fully charged (via a hydrometer). I did get a chuckle out of the 27 "poor" 31 "best" guy....but for a hint, its a liquid to capacity issue. The ones with more lead, less fluid, all suck in this application, regardless of physical size. The heat generated by running output and a charge concurrently has a tendency to reduce fluid level and run times, then even more charging takes place. Honestly the entry level group 24 with the lowest output holds up better than most higher rated 24's, 27's, 29's, and 31's (the same thing as a 29), because they have less lead and more electrolyte. They obviously don't run as long out of the box, but will hold up better in this less than ideal usage over time. Two 6V golf cart batteries in series are less prone to the fluid loss and increase the capacity, although when done with them a fluid check and a manual charge (verified by a hydrometer) should be standard service. RV's and semi sleepers even many today, are charging when plugged to power, when the generator is running and when going down the road. The standard charge VOLTAGE is often too hot for Marine/RV battery applications, which is why going to two 6 volts is beneficial: they displace the greater voltage, heat and discharge better because of those two reasons. If the run time isn't there, go to four of them, just monitor the fluid levels and charge (1275-1300 specific gravity, 6.36 OCV after surface charge).
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Campfire Outfitter
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Campfire Outfitter
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Dude, get a lithium inverter like EcoFlow, Jackery, Goal Zero, or Bluetti and some solar panels if you have to power med equipment.
6volt Golf cart batteries the gold standard for 1982
Last edited by JohnnyLoco; 05/08/21.
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Joined: Jun 2007
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Campfire Ranger
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Campfire Ranger
Joined: Jun 2007
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Sure, solar panels are infallible....they have been revolutionary in Haiti....
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