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Topic: Battery Charging (Read 720 times) previous topic - next topic

Battery Charging

1. How long should it take on shore power to fully charge all (house and engine) batteries?

2. If engine batteries are at 30 percent, how long would it take a battery tender trickle charge to fully charge those (2) batteries?

Thanks in advance for all help and advice.
1989 Foretravel U300 Grand Villa
Build #3410

Re: Battery Charging

Reply #1
It depends on the AH of the batteries and the age of them.
1999 40 ft. U-320 wtfe build 5563 Chuck & Lynda's "Rollin' Inn"  2030 watts solar
prev. mh's 71 GMC 5 yrs. 73 Pace Setter 1 yr. 78 Vogue 5 yrs 81 FTX 40ft all electric 18 yrs. 1996 Monaco Signature 3 yrs.
2014 Grand Cherokee Overland
Dream as if you will live forever. Live as if you will die today.  James Dean

Re: Battery Charging

Reply #2
I am not sure how yours is set up now or originally.  The house batteries will get charged by the inverter/charger or converter as yours might be if you are connected to a land line.  The start batteries as they were most likely originally set up will not get charged unless a combiner or second charger has been added.

If your house batteries (assuming 2 8Ds in good condition) are at 50% SOC a 75 amp converter/charger  with no other 12v loads might take 8-16 hrs.  If they have not been consistently recharged to 100% every time then that capacity may never be reached.

If your start batteries are at 30% they are hurting and a trickle charger (just a few amps) might have a hard time ever recharging them.

Lead batteries are at 50% SOC at 12.2 volts and done with what they should be doing and should be recharged promptly. 
Roger Engdahl and Susan Green
2001 U320 3610 #5879 (Home2) - 2014 Jeep Cherokee or 2018 F150
Hastings, MN

Re: Battery Charging

Reply #3
Roger,

Thanks. I've got them to 50% but am going to try a higher-amperage charge to see what happens. I may be looking at new engine batteries, but will try to get them to take the charge. Fortunately, they were not discharged completely.
1989 Foretravel U300 Grand Villa
Build #3410

Re: Battery Charging

Reply #4
Roger,

Thanks. I've got them to 50% but am going to try a higher-amperage charge to see what happens. I may be looking at new engine batteries, but will try to get them to take the charge. Fortunately, they were not discharged completely.

Subtract the price of a higher amperage smart charger from that of a PD9260 and all of a sudden it doesn't seem like such an extravagance.  Plus you get alternator backup, and if you can get your generator running a reasonable fast chassis battery charge after you've left the lights on.  And no messing with trickle chargers and booster switches.

Amazon.com: Progressive Dynamics PD9260CV Inteli-Power 9200 Series Converter/...
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1992 Foretravel Grand Villa
U225 SBID Build No. 4134
1986 Rockwood Driftwood
1968 S.I.A.T.A. Spring
1962 Studebaker Lark
1986 Honda VF700C
1983 Honda VF750C
Charlie, the Dog was broken out of jail 24 Oct 2023
N1RPN
AA1OH (H)e who must be obeyed.

Re: Battery Charging

Reply #5
I will look into the converter charger, although there is the possibility that this is the one I retrofitted last year. Many thanks!
1989 Foretravel U300 Grand Villa
Build #3410

Re: Battery Charging

Reply #6
I will look into the converter charger, although there is the possibility that this is the one I retrofitted last year. Many thanks!

Randall, you have that extra converter/charger mounted below, that is not plugged in. Just plug it into the 120 volt outlet where the male plug is hanging. That charger is hooked to only the engine batts, when we did all the repairs.

Also, unless you changed the invert/charger that someone had updated your coach with prior, the old one has an issue internally with the internal transfer switch.

Your boost switch was working fine, once we straightened it out, so you could flip it on for 24 hrs (max)

For others, his coach has 6 volt house batts, no 8 D's.

Chris
Chris and Tammy White  CDA Idaho
Previous owners 1997 U295 36' 3126 Cat 300 HP Build # 4998
Former Foretravel tech & RVIA certified tech
Former owner Custom Satellite home/RV satellites 
Former owner Vans LTD  van conversions
Unemployed, panhandler, drag racer NHRA #6348

Re: Battery Charging

Reply #7
My '81 came with 4 6 volt house batteries also. I converted the charger inverter system to 24 volts with a Trace 4024 and used a step down to 12 volts for the house systems.
1999 40 ft. U-320 wtfe build 5563 Chuck & Lynda's "Rollin' Inn"  2030 watts solar
prev. mh's 71 GMC 5 yrs. 73 Pace Setter 1 yr. 78 Vogue 5 yrs 81 FTX 40ft all electric 18 yrs. 1996 Monaco Signature 3 yrs.
2014 Grand Cherokee Overland
Dream as if you will live forever. Live as if you will die today.  James Dean

Re: Battery Charging

Reply #8
Randall, you have that extra converter/charger mounted below, that is not plugged in. Just plug it into the 120 volt outlet where the male plug is hanging. That charger is hooked to only the engine batts, when we did all the repairs.

Also, unless you changed the invert/charger that someone had updated your coach with prior, the old one has an issue internally with the internal transfer switch.

Your boost switch was working fine, once we straightened it out, so you could flip it on for 24 hrs (max)

For others, his coach has 6 volt house batts, no 8 D's.

Chris
Chris,

Thanks—I totally forgot about that extra charger. I will keep that in my electrical notes for future reference. I was able to get my engine batts up to 100 percent with the battery charger and boost, so am set to get underway next week.

I appreciate the help.

1989 Foretravel U300 Grand Villa
Build #3410

Re: Battery Charging

Reply #9
Chris,

Thanks—I totally forgot about that extra charger. I will keep that in my electrical notes for future reference.

I appreciate the help.



I am your "electrical notes"...LOL
Chris and Tammy White  CDA Idaho
Previous owners 1997 U295 36' 3126 Cat 300 HP Build # 4998
Former Foretravel tech & RVIA certified tech
Former owner Custom Satellite home/RV satellites 
Former owner Vans LTD  van conversions
Unemployed, panhandler, drag racer NHRA #6348