battery recommendation

Two sixers means no morning after sickness...

jgrimes wrote:
He said the SRM-4D 12 volt is comparable to the two sixes and a little less expensive. Anybody have experience with this larger 12 volt battery? Is this a

I am fond of saying there are no six volt batteries in an RV.. what you have is a 12 volt battery broken into two halves for ease in handling.

And I might add, that battery is an Group 4D Deep cycle,
I do not know if the SRM is a "Multi-Duty" (Marine/Deep cycle) or not but will check Yup it is.. I do not, as a rule, like this type of battery, I prefer a TRUE DEEP CYCLE such as a golf car battery.

But on paper the major difference is the weight This battery has the same capacity (Amp hours) as the GC-2s I have in my motor home. It is thus Twice the weight of one of those batteries.

I'm over six feet tall, over 300 pounds and routine lift 200 pound plus loads like some folks do a 20 pound load.

I was able to take the two 220 amp hour batteries OUT of my motor home with no problems (You slide them off the tray and lower them from below) but I was unable to lift the new 230 amp hour DEKA batteries off the ground when lying on my back. Standing no problem but not when lying on the ground under the RV.. Thankfully the store employee was able to lift it.
Consider this weight issue.

jgrimes wrote:
you'd need a crane to lift that 12V sucker.

Yep, that's another plus of using 6v: a 12v battery in two pieces.

After looking at the chart and seeing the weight, I'm thinking you'd need a crane to lift that 12V sucker. Seems like a much better choice to go with the two sixes. Thanks

The 12v version is not a ONE MAN battery for most of us. :)

Ed - He indicated they were close. In looking at the Interstate website, the 6 volt specs say: 232 Ah - 20 hrs; 475 - 12 A - RC; 122 - 75 A - RC;

The 12 volt is a marine battery - 1314 CCA; 1645 MCA; 390 RC; Hr Amp Load at 5 amps - 44.3; at 15 amps - 12 hrs.

That Interstate 4D is a very large battery (21"L x 8 1/4"W x 10 3/8"H) and has a reserve capacity of 390 minutes at 25A

The 6 volt interstate battery GC-2 has a reserve capacity of 474 min at 25 amps. If you take 2 of them and hook them in series to make 12 volts the reserve capacity is still 474 min. BUT in about the same space as is needed for the 4D. (10 1/4"L x 7 1/8"W x 11 1/4"H) 21"L vs 20 1/2"L

Look at the total weight of each option. More lead the more they can store.

The physical size limitation is huge in many RV's so check that out.

This year the 2006 T-105 Trojan 6v battery on the 36 volt golf cart would go down the hill but not back up. I had 4 of the DC-27 batteries from 2011 that we pulled from a computer UPS system with not real need for them so we pulled the 6 batteries and replaced with three of these at no new cost. They perform well with the cart 50% or 180 pounds lighter but the run time is 50% less than new 6v batteries but 1444% more run time than the 8 year old T-105 Trojans. :)

How many times do you wake up cold at 4 am because the furnace died due to weak batteries?

Building too large of battery banks can be bad too.

How many amp hours are they rated at?
Is it the same as the two 6 volt batteries you are replacing?