| Does the Onan charge if the buzz box is off? [message #229515] |
Tue, 12 November 2013 12:40  |
Otterwan
Messages: 946
Registered: July 2013
Location: Lynnwood (north of Seattl...
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I'm trying to figure out if the Onan charges the house battery at all if the buzz box is off. I know it has a small onboard 12v charging system, but my understanding is that it is not used on any but the earliest coaches.
1977 Birchaven, Lynnwood WA - "We may not be able to stop all evil in the world, but I know that how we treat one another is entirely up to us."
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| Re: [GMCnet] Does the Onan charge if the buzz box is off? [message #229523 is a reply to message #229515] |
Tue, 12 November 2013 13:02  |
powerjon
Messages: 2446
Registered: January 2004
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Nope! The Onan small charging system has been disabled by most owners. If you have one of the smart charging systems it can interfere with smart chargers.
JR Wright
78 Buskirk Stretch
75 Avion
Michigan
On Nov 12, 2013, at 1:40 PM, David Orders <dao@oarsllc.com> wrote:
>
>
> I'm trying to figure out if the Onan charges the house battery at all if the buzz box is off. I know it has a small onboard 12v charging system, but my understanding is that it is not used on any but the earliest coaches.
> --
> 1976 Royale "Twinkie II", 1978 Palm Beach with front end fire. Lynnwood WA
>
> “Before you criticize someone, you should walk a mile in their shoes. That way when you criticize them, you are a mile away from them and you have their shoes.”
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J.R. Wright
GMC GreatLaker
GMC Eastern States
GMCMI
78 30' Buskirk Stretch
75 Avion Under Reconstruction
Michigan
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| Re: Does the Onan charge if the buzz box is off? [message #229526 is a reply to message #229515] |
Tue, 12 November 2013 13:27 |
JohnL455
Messages: 4447
Registered: October 2006
Location: Woodstock, IL
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If you have a stock 76 the buzz box charges the house batt if on shore power or gen power with the plug in the recepticle. If you have a combiner it would also charge the engine batt. Charge is a guarded word as it never completes the charge and then floats, shortening battery life. A modern charge converter solves this issue over the buzz box.
John Lebetski
Woodstock, IL
77 Eleganza II
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| Re: Does the Onan charge if the buzz box is off? [message #229528 is a reply to message #229526] |
Tue, 12 November 2013 13:36 |
Otterwan
Messages: 946
Registered: July 2013
Location: Lynnwood (north of Seattl...
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| JohnL455 wrote on Tue, 12 November 2013 11:27 |
If you have a stock 76 the buzz box charges the house batt if on shore power or gen power with the plug in the recepticle. If you have a combiner it would also charge the engine batt. Charge is a guarded word as it never completes the charge and then floats, shortening battery life. A modern charge converter solves this issue over the buzz box.
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Thanks, that is what I thought, but it's nice to have confirmation. I have a 60 amp Inteli-Power 9200 sitting right here that's going in as soon as I find the time.
1977 Birchaven, Lynnwood WA - "We may not be able to stop all evil in the world, but I know that how we treat one another is entirely up to us."
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| Re: [GMCnet] Does the Onan charge if the buzz box is off? [message #229535 is a reply to message #229530] |
Tue, 12 November 2013 13:57 |
emerystora
Messages: 4442
Registered: January 2004
Karma: 13
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However, if it is still mounted on the Onan it probably is wired in to put in a trickle charge if the Onan is running.
When I installed my Statpower TruCharge 40 on my 1977 it would not charge the rear battery as it detected another charging source to that battery. Then manual said that it would not charge if another charger was connected to the battery. I disconnected the little charger on the Onan and then it worked fine. So, that shows that the little on-board charger was still working on the 1977 models.
There are two leads to the charger. One of them is a double wire connected to a single terminal. Leave both of those wires attached to that terminal adapter but tape around it. The other lead is a single lead. Just unplug it and tape it off as well. I removed the little charger. No need to have the little bit of extra weight when it wasn't being used.
Emery Stora
On Nov 12, 2013, at 12:39 PM, Larry Davick <ljdavick@comcast.net> wrote:
> I'm not sure about your Royale but my Palm Beach is a '76 and the house batteries are charged by the charger / converter or by the engine alternator. I believe that by '76 the Onan's on board 12v charger was no longer used I our coaches.
>
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