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Batteries / Battery Charger
- denpooch
- Commander
- Posts: 385
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- Vessel Info: 2005 360 Mariner
Crusader 6.0 Captains Choice - Location: Long Island
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Batteries / Battery Charger
I am thinking that I will replace the two bad batteries ( house and Starboard starter) with AGM. I called Carver today and spoke with Brian who mentioned that I should change the battery charging 'type' on the CHARLES 5000 charger which is permanently mounted in the engine room.
Who even knew that the unit needed to be adjusted for battery type? I must change setting to AGM. Question for the pros:
Did I damage batteries by having a mix of technologies? Since the charger is factory default to 'gel', are the batteries compromised? Is there any reason not to go with the AGM technology since all batteries in the bank will now be AGM.
What do you think? Thanks
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- CYO Supporter
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- Vessel Info: 1989 Carver 3807 Aft Cabin
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Re: Batteries / Battery Charger
AGMs are good batteries, they have some desirable qualities however in my experience I don't find they last any longer on average than flooded for the additional cost though most expect they will. Flooded is still the best bang for the buck IMO.
- denpooch
- Commander
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Re: Batteries / Battery Charger
I do think that one of the newer AGM batteries was affected as the 'state of health' meter is low on the (good) range.
- km1125
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Re: Batteries / Battery Charger
GEL are different and VERY sensitive to a higher voltage over long term. It will destroy them. That's probably why the charger is set to GEL by default. If you used it on another setting and had GEL batteries you'd destroy them quickly.
Setting it on GEL and using it on the other batteries (AGM or Wet) will not be the best for the batteries but it won't destroy them. You'll lose a bit of capacity over time though.
Is your thuster a 24v thruster? Are you paralleling that battery with the start battery, or are they in series? If they are in series, what do you use to charge the thruster battery?
The problem with using batteries of different type is in the recharging. If you're recharging them independently, then it's perfectly OK to have different battery types. If you're trying to use the same charger input (and the batteries are in parallel or in series) then it makes a huge difference if the batteries are not the same.
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- CYO Supporter
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Re: Batteries / Battery Charger
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- CYO Supporter
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Re: Batteries / Battery Charger
km1125 wrote:Source of the post....If you're recharging them independently, then it's perfectly OK to have different battery types....
I'm not sure I'm following but I might be reading it wrong. Unless you have a very expensive charger where you can program a different battery type for each bank, or are using multiple charges, all the batteries on the boat being maintained by the same charger with multiple bank outputs should all be the same type so the (single) charge curve setting suites all the batteries hooked up to that charger.
Having said all that, what do we do about the charging characteristics when the batteries are being charged by your conventional alternators that don't have settings for different battery types?
There are smart alternator charger systems out there now that are becoming more popular due to the higher costs of some battery types but very few people upgrade this part of their charging system when upgrading to expensive batteries.
- bud37
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Re: Batteries / Battery Charger
- Cooler
- Admiral
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- Vessel Info: 1995 Carver 330 Mariner
Twin 350XL Crusaders
Home port: Menominee, MI - Location: Green Bay, WI
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Re: Batteries / Battery Charger
( All weather people have to say this on air, near lakes )
- denpooch
- Commander
- Posts: 385
- Joined: April 9th, 2017, 8:03 pm
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Crusader 6.0 Captains Choice - Location: Long Island
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Re: Batteries / Battery Charger
KM its a 12 volt thruster and the two starter batteries (900 CCA) are wired in series. Per the owners manual regarding the Charles 5000:
"...The voltage levels of both engine batteries and the “house” battery are monitored and maintained by a single battery charger.....The voltage level of the generator battery is monitored and maintained by a single battery charger.."
I figure if the battery charger is maintaining the starter battery then it is also wired to the thruster battery 'in series'.
Since the Genset battery tests 'good', I will set the 30A Genset battery charger to 'Lead Acid'.
Viper the owner manual also states: "...While the engines are running, their alternators generally supply enough power to replace the power used by the boat’s 12-volt equipment.."
So I guess they are not too worried about that. No 'smart' alternator for me.
- bud37
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Re: Batteries / Battery Charger
Cooler wrote:Source of the post Bud37 - The battery chemistry selector switch is on the bottom. See page 6 of the manual for details: http://www.charlesindustries.com/marine ... argers.pdf er
That is only if he has the newer SP model charger, which he may well have in a 2005.
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