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Old 10-08-2018, 07:19 AM   #1
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2018 Forester not charging house batteries

Hi
Have a 2018 Forest River Forester class C with a problem.
The house batteries are pretty much dead and not charging.

The reading on the control panel was showing 7.7 volts.
Left the coach plugged in overnight, worse, panel will not come on.

Connected a battery charger to the batteries, started to take a charge.

Not sure where to begin, does anyone have an idea?

Thank you
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Old 10-08-2018, 08:11 AM   #2
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Chargers

First go through your owner's manual and cover all of the basics. Check all the connections and make certain the isolated is turned on if you have one. Next go back to your converter/charger to see if it is indeed "intelligent". Make sure it has a fob attached to change the mode or a switch on the side. If no problems are yet apparent put a volt meter on it.
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Old 10-08-2018, 08:20 AM   #3
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Couple of things to check;
Make sure the 120VAC circuit breaker for the converter is on.
Verify that the reverse polarity fuses that are located in the power distribution box (3, 25 amp) are good.
If above is good verify that 120VAC is getting into the converter, and that 12VDC nominal, will measure between 13.2 - 14.4 is being produced by the converter.
The converter is located in the bottom half of the power distribution panel. The cover removes with 5 screws.
There is also a 30amp DC breaker located in the Battery control center located in the step by your batteries.
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Old 10-08-2018, 09:58 AM   #4
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Thank you
Will check these things
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Old 10-08-2018, 01:36 PM   #5
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I have a 2016 Forrester. Same issue. Check the electrolyte in the batteries no water it's fried. My was not covered under warranty
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Old 10-09-2018, 09:02 AM   #6
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Still not charging

Thank you for the replies

Checked levels in battery, ok.

The converter is outputting 14.4 volts
Tried running the coach while plugged in to see if I could 'wake up' the solenoid in the battery control center panel
shows 14.4 volts to one side of the solenoid
The other leg (assume to batteries) registers 8.7 volts which is the current state of the batteries and intermittently jumps to 11.67 volts after there is a click from the solenoid for a few moments and then drops back to battery voltage.

Currently have the batteries on a separate battery charger, trickle 3 amp charge.
want to see if the batteries will accept the charge back to 12 volts.
Would appreciate any comments.
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Old 10-09-2018, 09:57 AM   #7
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Check the battery cables themselves, as well. Had a similar issue when I did the PDI on mine-we were camped at the dealer, plugged in, everything working, then slowly lost power through the night. Turned out the connector on one wasn't crimped, and the cable had pulled loose.
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Old 10-09-2018, 09:59 AM   #8
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Response to Gizmo

You mentioned having the same issue with your Forester, can you tell me what the issue was and how was it resolved?
Thanks
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Old 10-09-2018, 11:11 PM   #9
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Quote:
Originally Posted by ghhmtnboy View Post
Thank you for the replies

Checked levels in battery, ok.

The converter is outputting 14.4 volts
Tried running the coach while plugged in to see if I could 'wake up' the solenoid in the battery control center panel
shows 14.4 volts to one side of the solenoid
The other leg (assume to batteries) registers 8.7 volts which is the current state of the batteries and intermittently jumps to 11.67 volts after there is a click from the solenoid for a few moments and then drops back to battery voltage.

Currently have the batteries on a separate battery charger, trickle 3 amp charge.
want to see if the batteries will accept the charge back to 12 volts.
Would appreciate any comments.
Did you verify that the 30amp C/B in the BCC is not tripped. It is bolted to the bus bar that connects between the solenoid and the PCB. The reset button should be on the left side.
You should see the output of the converter on both terminals of the C/B. If the left terminal read the house battery voltage then it is open.
The top terminal on the BCC solenoid is the house batteries, the lower terminal is the chassis battery.
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Old 10-09-2018, 11:15 PM   #10
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Sounds like you have a bad solenoid.
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Old 10-10-2018, 07:48 AM   #11
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Hmmm

Charged the house batteries with a separate battery charger up to 10.5 volts.
Started the coach, the solenoid picked up. voltage on both legs, charging batteries.

Let it run for a bit, up to 12 volts.

Stopped and plugged coach back in.
Panel showed the lightning bolt for charging, however, battery voltage kept dropping.

Having an attack of the dumbs, confused.

Back to basics
At our home,
we do not have 30 amp service
Using 12 gauge extension cords, 200 feet
Would a drop caused by the cords be affecting this??:sad:
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Old 10-10-2018, 07:56 AM   #12
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Charged the house batteries with a separate battery charger up to 10.5 volts.
Started the coach, the solenoid picked up. voltage on both legs, charging batteries.

Let it run for a bit, up to 12 volts.

Stopped and plugged coach back in.
Panel showed the lightning bolt for charging, however, battery voltage kept dropping.

Having an attack of the dumbs, confused.

Back to basics
At our home,
we do not have 30 amp service
Using 12 gauge extension cords, 200 feet
Would a drop caused by the cords be affecting this??:sad:
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Old 10-10-2018, 08:02 AM   #13
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Sorry for the duplicate response

again sorry
Steve-W
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Old 10-13-2018, 08:24 AM   #14
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Thank you everyone

While charging the batteries, lifted the caps on each one.
One battery was bubbling, the other was not.

Dead cells, answers question.
Going to replace both batteries.

Thank you everyone for your interest and help.

George
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Old 10-13-2018, 02:08 PM   #15
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It does sound like you have a bad battery. For others experiencing similar problems always make sure your battery cut off switch is off. (Meaning your batteries are supplying power to coach). If you disconnect batteries using the cut off switch the batteries will not charge.
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Old 10-13-2018, 07:27 PM   #16
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FR and others give the switch different naming to keep all confused. My 3051 has a switch labeled “Battery” with two labels saying “on” and “off”. And it works that way.

Easiest way to check is disconnect external AC power, find a few lights still working and flip the switch. Lights out means batt off, lights on means batt on. Pretty simple.

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Old 10-15-2018, 09:11 AM   #17
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New batteries

The coach came with group 27 conventional lead acid batteries.
Plan to replace them with AGM batteries.

It looks like there is adequate space in the battery compartment to accommodate group 31 batteries.
Would anyone know if using them rather than group 27 would be a better choice?

Thankyou
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Old 10-15-2018, 04:45 PM   #18
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I have thought about when the time comes for me to replace the factory batteries to also use group 31’s. The only reason not to is being able to fit them in, which by my measurements, should be easily possible.
I remember a while back reading a thread about someone installing G 31’s with no issue. He was not able to use the hold down strap due to clearance but was planning to stick a couple of peices of foam or similar on either end.

Please update us with the outcome and battery type & mfg if you go that route.
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Old 10-20-2018, 09:16 AM   #19
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Lead acid to AGM

I installed 2 group 31 AGM batteries in place of the stock group 27 lead acid.
In a 2018 Forester 2801QS

Bought the batteries at Sam's Club
$179 each
Duracell Platinum AGM MRV and Marine battery
31DTMAGM
18 month guarantee

The battery compartment was nasty, rust and dirt.
Surprised, one year old coach, very limited use.

Cause-- two inch hole low in the back panel of box-probably for ventilation
and a 1 inch hole in the left panel --jagged like might have been the result of welding near it
corners on the bottom of the panel not tight, daylight apparen

I sealed everything, sanded and painted the box
AGM batteries do not emit vapors when charging, don't need vent holes
Is there something that should be checked or changed in the converter or charger?

Thank you.
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Old 10-20-2018, 08:35 PM   #20
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Thanks for the great info. I most likely will do the same next season.

Iíve noticed some corrosion in my battery box as well. Someting I will need to address as well.
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