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Re: Battery Power for My CPAP
Grit Dog, Converting RV house batteries to Lithium is not cheap or simple, you will need to change the converter charger to a lithium type. Lithium batteries need to be protected from low temperatures. It's doable. Rick Jay, I'll try series connection for 24 volts without using converter. I will need a 24 volt charger or can charge each 12 volt battery separately with 12 volt charger. Connecting two batteries in series and getting the same capacity/duration just doesn't seem right. BTW, my moniker on RC Groups forum is "E-Challenged" for good reason.869Views0likes0CommentsRe: Battery Power for My CPAP
I am someone who is into RC models and use lipoly batteries in series and parallel for different applications. I connected two 12 volt 18ah SLA batteries in parallel to double the capacity (36 ah) because I had them. I know I could connect the same two batteries in series, and eliminate using the converter, but the capacity would be 18 ah. I imagine I might get one or possibly two nights CPAP use. I may try two 12 volt 2Oah LIfe POR batteries, now relatively cheap, in parallel with converter or in series without converter and test for actual results. Will have to buy a Lithium charger though. I may convert to Lithium batteries for my mobility scooter also.869Views0likes0CommentsRe: Battery Power for My CPAP
There are 18 ah rated lithium batteries that weigh around 1/2 as much as sealed lead acid ones, but they require special lithium chargers and cost more than SLA's. There are also some small lightweight lithium CPAP batteries that cost nearly $400 and only give one night's CPAP power. There are solar power setups that can charge CPAP batteries for unlimited CPAP power. Many choices.871Views0likes0CommentsBattery Power for My CPAP
There are a number of solutions for short term powering of CPAP machines while off-grid camping or during power outages, with quite a range of costs. I use a ResMed Airsense 10 CPAP with humidifier and heated hose features disabled. I use a ResMed 12vdc to 24vdc converter,($100) connected to two (2) 12volt 18 amp hour sealed lead acid batteries,($100 per pair) connected in parallel, for 12 volts 36amp hour capacity. I get three 8-hour nights CPAP operation and end voltage is 12.53 volts. I might get a fourth night's worth but don't want risk stressing batteries and shortening their useful life. I use a 12 volt "Battery Minder" smart trickle charger ($50) to charge and maintain the batteries. I takes some 24 hours to recharge the batteries and charger switches to maintenance mode, I leave the charger connected continuously. I use two of these same SLA batteries in my mobility scooter. Note, my CPAP will run on any 24 volt DC source. The 110 volt AC power supply, for home use, provides 24 volts DC to the CPAP. I could also connect the DC to DC converter to my RV's house battery to power the CPAP while off grid but prefer to save house batteries for lights, furnace fans, and appliance controls, etc.1.7KViews0likes9CommentsRe: Recommend Good E-450 Dash AC Repair, SoCal
The problem of no air/AC flow through dash vents is fairly common on older E-450 RV conversions. Plastic vacuum tubing hardens and cracks from engine heat and aging. Tubing should be replaced by good rubber tubing. There may a cracked vacuum tank, and other possible problems. I suspect that vacuum leak may cause a problem with smog test readings and general engine performance. It looks like later E-450 conversions use an accessible add-on electric vacuum pump to avoid this problem.832Views0likes0CommentsRecommend Good E-450 Dash AC Repair, SoCal
Our 2004 Fleetwood Tioga 26Q has a dash AC problem, the vacuum actuator is not working to divert cold air through the dashboard vents. This is caused by a leak in a vacuum hose that is located in the rear of the engine. There are a number of "band-aid" fixes to bypass the problem but I want the fix done right by an expert AC repair man. I am 84 and unable to do the work myself. If any of you have had the same problem and had it fixed by a good AC repair place, please give me a recommendation. I live near Disneyland.2.6KViews0likes9CommentsRe: Can I charge the house battery with the engine alternator?
heyobie wrote: My 88 is in much better shape than you have deduced. My Onan generator works great. The inverter/charger has been updated. This unit only came designed with one 12v house. I now have 2 in parallel. My issue was that the charging system with the car alternator had been kinda stripped out and modified. With everyone's help here, I got it straightened out and now it works perfectly. So I am good to go. Sorry, I had your post confused with Scadaman's772Views0likes0Comments
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