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 > Deep Cycle Battery Suggestions

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stugpanzer

Illinois

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Posted: 10/26/20 01:38pm Link  |  Quote  |  Print  |  Notify Moderator

I might need to get two 12 volt deep cycle (house) batteries for my coach. I have been looking at going with gel batteries but I am curious if anyone else has gone that route and have suggestions for what I may want to look at.


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theoldwizard1

SE MI

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Posted: 10/26/20 01:51pm Link  |  Quote  |  Print  |  Notify Moderator

Much better off with two 6V golf cart batteries.

AGM 6V golf cart batteries do exist but they are $$$ (Trojan T105-AGM) and would have to be ordered through a golf cart store or solar power store.

Ed_Gee

Central Oregon coast

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Posted: 10/26/20 02:03pm Link  |  Quote  |  Print  |  Notify Moderator

If you don't mind checking battery cell electrolyte levels and battery corrosion cleaning then two GC-2 6V batteries would do just fine. Otherwise I'd suggest two 12V AGM batteries like Renogy 12V 100Ah units...


Ed - on the Central Oregon coast
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stugpanzer

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Posted: 10/26/20 02:15pm Link  |  Quote  |  Print  |  Notify Moderator

theoldwizard1 wrote:

Much better off with two 6V golf cart batteries.

AGM 6V golf cart batteries do exist but they are $$$ (Trojan T105-AGM) and would have to be ordered through a golf cart store or solar power store.


I need to double check and see if my two house batteries are 12volt or 6volt. Thanks for the input!

time2roll

Southern California

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Posted: 10/26/20 03:07pm Link  |  Quote  |  Print  |  Notify Moderator

Stay away from GELL. Need special charging to limit voltage and amps.

Get AGM if you want no maintenance. I recommend Lifeline.

Otherwise a couple flooded batteries from Costco is a good value.

Or is there something special we should consider in the recommendation? Two batteries seems light for such an RV but maybe you are almost always plugged in.


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stugpanzer

Illinois

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Posted: 10/26/20 03:20pm Link  |  Quote  |  Print  |  Notify Moderator

time2roll wrote:

Stay away from GELL. Need special charging to limit voltage and amps.

Get AGM if you want no maintenance. I recommend Lifeline.

Otherwise a couple flooded batteries from Costco is a good value.

Or is there something special we should consider in the recommendation? Two batteries seems light for such an RV but maybe you are almost always plugged in.


thanks for the tip. This coach is set up for two batteries and yes, we do stay plugged in most of the time.

pianotuna

Regina, SK, Canada

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Posted: 10/26/20 03:35pm Link  |  Quote  |  Print  |  Notify Moderator

Hi,

If you want possibly the toughest battery available, look closely at SiO2 chemistry. This is what I've gleaned so far:

They can be discharged to stone bone dead 620 times without dying. After those 620 cycles, 80% of OEM capacity remains. They are about 1/2 the price of LI. They can be used and charged at -45 c to +65 c. (-49 f to 149 f)

At 50% discharge cycles are 2800 (80% of OEM left)

At 80% discharge cycles are 1500 (80% OEM left)

They can be draw on at a rate of 9C for 5 seconds.

They do not need to be recharged to 100%, but once a month a full charge is recommended.

From the seller:

“This battery has 1200 Watt Hours of storage.

You can access 100%, but it is recommended that you do not regularly discharge over 80% because it will shorten the lifespan of the battery.

At 80%, the usable capacity is 960 Watt Hours of storage. Max peak discharge is, (for the 100 amp-hour) is 900A (5s) at 25 degrees C.

Constant Amp discharge rate is 320A (about 5 minutes until the battery is fully discharged). For charging the rate is .25C (4 hour) charge rate (25A for 1 100Ah 12V battery).”

The only negative is weight. The "best buy" is currently the 100 amp-hour battery."

For USA pricing go here:

https://azimuthsolarproducts.com/product-category/batteries/sio2/

I've found the Azimuth company extremely responsive to questions, often replying on the same day.

The manufacturer is the Canadian company https://soneil.com/

Technical Brochure is:

https://soneil.com/wp-content/uploads/2018/07/12-EFSN-100.pdf


Regards, Don
My ride is a 28 foot Class C, 256 watts solar, 556 amp hours of AGM in two battery banks 12 volt batteries, 3000 watt Magnum hybrid inverter, Sola Basic Autoformer, Microair Easy Start.

Ed_Gee

Central Oregon coast

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Posted: 10/26/20 03:55pm Link  |  Quote  |  Print  |  Notify Moderator

stugpanzer wrote:

theoldwizard1 wrote:

Much better off with two 6V golf cart batteries.

AGM 6V golf cart batteries do exist but they are $$$ (Trojan T105-AGM) and would have to be ordered through a golf cart store or solar power store.


I need to double check and see if my two house batteries are 12volt or 6volt. Thanks for the input!


Not really a problem going either way. If you get two 6v batteries you just wire them in series.

midnightsadie

ohio

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Posted: 10/26/20 05:18pm Link  |  Quote  |  Print  |  Notify Moderator

plugged in most the time? get two wal mart deep cycle marine, the biggest that will fit. mine are four years old and work great. and you won,t break the bank.we some times boondock for a week end no problem.

Ray,IN

IN, USA

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Posted: 10/27/20 10:02pm Link  |  Quote  |  Print  |  Notify Moderator

midnightsadie wrote:

plugged in most the time? get two wal mart deep cycle marine, the biggest that will fit. mine are four years old and work great. and you won,t break the bank.we some times boondock for a week end no problem.

I use 100A Delco batteries from Sams Club, likely the same battery different label.


And so, my fellow Americans: ask not what your country can do for you — ask what you can do for your country.John F. Kennedy 20Jan1961

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