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Old 06-04-2014, 04:02 PM   #1
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House batteries

DOES ANY ONE KNOW WHAT THE HOUSE BATTRIES IN A 3010DS ARE RATED FOR. THERE ARE A BLACK GENERIC LOOKING BATTRIES AND HAVE NO NAME OR RATINGS ON THEM. THEY CAME IN A NEW 2013 UNIT WE JUST PURCHASED. WE CAN NOT GET THORUGH THE NIGHT WITH THE FURNACE RUNNING ON NIGHTS AT 40DEG, NOTHING ELSE ON. STAT AT 64DEG THIS IS FROM APROX 11PM UNTILL 5AM AND THEY ARE DOWN TO 9.8V . I HAD THEM CHECKED AT THE DEALER AND THEY SAID THEY WERE FINE. I BELIEVE THAT THEY SAT FOR SO LONG THEY ARE NO GOOD. FOUND OUT THE COACH HAD SET ON THERE LOT FOR 11 MONTHS.
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Old 06-04-2014, 05:41 PM   #2
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I didn't see any ratings on my batteries either.

Sitting for 11 months, mostly likely not at a full charge, will seriously reduce the capacity of a battery... as you sound like you already know. Most likely it wasn't plugged in to 110V and had people going through it leaving lights on and playing with the slides etc. while it was on the lot.

My advice would be to bring them to an auto store or repair shop that has a proper battery tester. There are machines out there that put a load on a battery - then charge it - then report on the condition of the battery. That will give you an unbiased, independent evaluation of each battery.

Your dealer won't go to this much trouble and probably doesn't have the proper machine and doesn't want to admit they didn't maintain the batteries correctly and one or both are dead.
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Old 06-04-2014, 05:50 PM   #3
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Quote:
Originally Posted by kevin langston View Post
DOES ANY ONE KNOW WHAT THE HOUSE BATTRIES IN A 3010DS ARE RATED FOR. THERE ARE A BLACK GENERIC LOOKING BATTRIES AND HAVE NO NAME OR RATINGS ON THEM. THEY CAME IN A NEW 2013 UNIT WE JUST PURCHASED. WE CAN NOT GET THORUGH THE NIGHT WITH THE FURNACE RUNNING ON NIGHTS AT 40DEG, NOTHING ELSE ON. STAT AT 64DEG THIS IS FROM APROX 11PM UNTILL 5AM AND THEY ARE DOWN TO 9.8V . I HAD THEM CHECKED AT THE DEALER AND THEY SAID THEY WERE FINE. I BELIEVE THAT THEY SAT FOR SO LONG THEY ARE NO GOOD. FOUND OUT THE COACH HAD SET ON THERE LOT FOR 11 MONTHS.
See HELP! Converter problems

In for service, waiting on a new Battery Control Center.
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Old 06-04-2014, 07:36 PM   #4
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Let's first say that heaters in cold weather can use a lot of amps. You could have batteries that are in pretty good shape but you ARE killing them if you let them get below 12.2 volts which is where recharging MUST start. 9.8 volts even under load is a dead flat battery. Batteries IF fully charged will lose about 10% of their charge a month in cold weather. More in hot weather so if they sat without charge for 11 months...they have been damaged if not made useless. They definitely need to be tested. Take them to a battery shop for testing or follow the proper steps to test them correctly yourself with a voltage meter or hydrometer.
If you have a battery charger and a voltmeter:
1. Turn the battery charger on and measure voltage AT the chargers terminals...should be minimum 13.6v to around 14.5 volts. Then check the voltage at your battery terminals...should be the same. If not ...you may have a bad connection preventing proper battery charging or a shorted battery. Pull and replace if so.
2. Assuming all is well with the charging system...leave it on ALL night to insure a full charge to your batteries.
3. In the AM...pull the negative wires off the batteries and let them sit for 24 hours.
4. After 24 hours ...measure the voltage at the battery terminals. It should be 12.6 if the batteries are healthy. Anything around 12.4V indicates significant loss of capacity. Anything 12.2 or below indicates severe damage...buy new ones.

Assuming you need new ones ...you'll need to figure out what size you have now OR if you have more room for BIGGER batteries in the space available.
1. Assuming the dealer installed 12V batteries...the most commonly used are group 24 and group 27. Possibly 31. If you see ANY of those numbers on the black beauty batteries...that is your size.
2. Alternatively...measurements are a giveaway. length, width and height of each of these 3 sizes are:
group24... 101⁄4 x 6 3⁄4 9 7/8 typical 75 -80amp hours
group27...12 3/4 x 6 3/4 x 9 7/8 typical 90-95 amp hours
group27... 13x 6 3/4 x 9 5/8 typical 100-105 amp hours.
There will be minor variations due to case design but assuming 12V...your tape measure is your friend. NOW while you have the tape measure out...measure the space you have available for your house batteries.
IF you can accomodate: 10 1/4 x 7 1/4 x 10 7/8 pair...NOW is a chance to make the switch to a golf cart 6V pair to make up a deep cycle 220 amp hour pair @ 12V....at great prices from Sams and/Costco.
Hope this helps...good luck with the process...and since you apparently do boondock...suggest you get a REAL battery monitor so you don't kill the new ones in short order. Like this:

Victron BMV 700 Battery Monitor
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Old 06-04-2014, 09:23 PM   #5
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May I suggest a little less expensive approach to battery health and voltage monitoring.

https://www.dx.com/p/led-display-cig...c-12-24v-68179

Amazon.com: Battery Hydrometer

The glass tube ones are more reliable.
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Old 06-04-2014, 09:54 PM   #6
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May I suggest that VOLTAGE monitors are completely unsuited to monitoring battery use and life cycle requirements in boondocking. You MUST be able to monitor amps in and out, used and remaining in order to NOT murder your battery in boondocking.
Voltage monitors are suitible for':
1. Figuring out that your battery is or is not dead after leaving the coach for a month.
2. Understanding that your charger is working.
3. And NOTHING else. A reading of 12.6 or 11.5 is absolutely meaningless in an in use coach.
No one would buy true monitors if they didn't get TRUE VALuE for the extra $150 bucks.
Note that there is NO need for a battery monitor if you are plugged in 99% of the time. If you boondock though...you will pay the price for a real battery monitor one way or another.

Hydrometers are also really good tools if you can first fully charge your batteries, then wait for 24 hours with nothing connected to them before you take your reading. They are also good for detecting fully dead cells. Assuming you want to know what your battery is doing and needs at the moment...they are useless in dry camping....but valuable and cheap for deciding the AT REST condition of a fully charged battery.
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Old 06-04-2014, 10:37 PM   #7
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Many of us use this to monitor our batteries. It is very inexpensive and will track amperage and percent battery remaining.

Trimetric 2025 Battery Monitor
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Old 06-04-2014, 10:44 PM   #8
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House battries

The coach was plugged in for 4 days before we left, we put 400 miles on that day.
Voltage and battery minder showed all was in good shape, there are 2 group 27 batteries, we had nothing on once we stopped. 6 hours later with the furnace coming on 7-8 times they were at 9.8 volts. I ran the next day 500 miles and the same result, they are on charge again and i will take a hydrometer reading after they set for 24 hours and see what that shows. I was trying to see what type and rated batteries they put in from the factory. Or did the dealer take good batteries out and put cheap or old ones in? This is what i am trying to figure out.
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Old 06-04-2014, 10:50 PM   #9
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Quote:
Originally Posted by kevin langston View Post
The coach was plugged in for 4 days before we left, we put 400 miles on that day.
Voltage and battery minder showed all was in good shape, there are 2 group 27 batteries, we had nothing on once we stopped. 6 hours later with the furnace coming on 7-8 times they were at 9.8 volts. I ran the next day 500 miles and the same result, they are on charge again and i will take a hydrometer reading after they set for 24 hours and see what that shows. I was trying to see what type and rated batteries they put in from the factory. Or did the dealer take good batteries out and put cheap or old ones in? This is what i am trying to figure out.
Check your fridge to make sure the climate control is OFF. It is DC and is an electric heater.

Charging off the converter can take 52 hours to recharge a single deep cycle battery to 100%; almost double that for a pair.

Charging off the alternator alone can take a week.

The best way to recharge your batteries is with a generator and a dedicated high amperage battery charger; plugged into the generator.
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Old 06-04-2014, 11:01 PM   #10
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House battries

Did not have the fridge on. Have not even turned the fridge on yet. Was driving from florida to michigan , there was nothing on.
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