So I just picked up two Interstate GC2 6v's from Costco for $94 ea.The sticker states 210Ah@ 20hrs.I dont plan on using them for about another month so I will just store them inside so they dont freeze.I ran them in series on my workbench and get a charge of 12.35So I assume this is at about 70% capacity?I have a 40/120a car shop charger. Would it be ill advised to use this to top off the new batteries, or should I just hook them up to my TT and plug it into the house. The TT has a 3 stage converter/charger power center..Kind of overwhelmed with battery service & maintenance as I go about reading about it. Going into only my second season with my new TT and the house battery from the dealer was a real poc that barely got me through last year.I know I need to pick up a hydrometer and distilled water eventually.Any tips would be great for a newb.

Despite WFCO's claim to the contrary your converter is unlikely to ever deliver a 14.4 volt bulk charge that your two 6 volt batteries in series should see so you're already off to a bad start. Many here would recommend that if you truly care about those batteries that you replace the WFCO with a converter that can properly maintain them.

Use your shop charger and charge them up. Fully charged they won't freeze but you can keep them inside, it will probably make it easier to charge them anyway.

Distilled water "eventually"??? Get it now. People have gotten spoiled the last 40 years or so with maintenance free batteries. 6 volt golf cart batteries need frequent re-watering. You might want to consider the watering systems they sell, especially if the batteries are in a location where looking in the top isn't easy. I'd install them now and let the RV's converter do the job it was intended to do. The upside to the 6 volts is that if you keep them watered and the terminals clean they will usually reward you with 7-8 years of service. Our previous coach had a WFCO and we had no problems with batteries being undercharged.https://www.amazon.com/Trailer-Electrical-Battery-Watering-Stystem/dp/B00MJUP1SA/ref=sr_1_12?keywords=battery+watering+system&qid=1551472761&s=gateway&sr=8-12

garyemunson wrote:Our previous coach had a WFCO and we had no problems with batteries being undercharged.Ignorance is bliss :W - fact is just about every WFCO owner, myself included, who has taken the time to actually measure what their converter is capable of report that it never delivers a 14.4 volt bulk charge to the battery terminals - never. :M I turned mine off and instead use a stand alone charger than does. :B

Don't want to steal the thread but related... I have a voltage meter hooked directly to the battery and a WFCO converter. It reads 13.7 when plugged in to a/c. Sometimes 13.3. It may go higher but those are the readings I have noticed. Does that indicate the charge rate? Is it adequate for GC batteries? I don't have GC batteries but was thinking about it.

New dual 6v's. Need some advice plz | Good Sam Community

35 Replies

riven1950
Explorer
Mar 01, 2019
Don't want to steal the thread but related... I have a voltage meter hooked directly to the battery and a WFCO converter. It reads 13.7 when plugged in to a/c. Sometimes 13.3. It may go higher but those are the readings I have noticed.

Does that indicate the charge rate? Is it adequate for GC batteries? I don't have GC batteries but was thinking about it.
SoundGuy
Explorer
Mar 01, 2019
garyemunson wrote:
Our previous coach had a WFCO and we had no problems with batteries being undercharged.

Ignorance is bliss :W - fact is just about every WFCO owner, myself included, who has taken the time to actually measure what their converter is capable of report that it never delivers a 14.4 volt bulk charge to the battery terminals - never. :M I turned mine off and instead use a stand alone charger than does. :B
garyemunson
Explorer II
Mar 01, 2019
Distilled water "eventually"??? Get it now. People have gotten spoiled the last 40 years or so with maintenance free batteries. 6 volt golf cart batteries need frequent re-watering. You might want to consider the watering systems they sell, especially if the batteries are in a location where looking in the top isn't easy. I'd install them now and let the RV's converter do the job it was intended to do. The upside to the 6 volts is that if you keep them watered and the terminals clean they will usually reward you with 7-8 years of service. Our previous coach had a WFCO and we had no problems with batteries being undercharged.
https://www.amazon.com/Trailer-Electrical-Battery-Watering-Stystem/dp/B00MJUP1SA/ref=sr_1_12?keywords=battery+watering+system&qid=1551472761&s=gateway&sr=8-12
opnspaces
Navigator III
Mar 01, 2019
Use your shop charger and charge them up. Fully charged they won't freeze but you can keep them inside, it will probably make it easier to charge them anyway.
SoundGuy
Explorer
Mar 01, 2019
Despite WFCO's claim to the contrary your converter is unlikely to ever deliver a 14.4 volt bulk charge that your two 6 volt batteries in series should see so you're already off to a bad start. Many here would recommend that if you truly care about those batteries that you replace the WFCO with a converter that can properly maintain them.

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New dual 6v's. Need some advice plz

35 Replies

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