Assistance on new house battery

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BCI

Group

Number
Maximum Overall Dimensions footnote
Millimeters Inches
L W H L W H
PASSENGER CAR AND LIGHT COMMERCIAL_BATTERIES 12-VOLT (6 CELLS)
21 208 173 222 8 3/16 6 13/16 8 3/4
22F 241 175 211 9 1/2 6 7/8 8 5/16
22HF 241 175 229 9 1/2 6 7/8 9
22NF 240 140 227 9 7/16 5 1/2 8 15/16
22R 229 175 211 9 6 7/8 8 5/16
24 260 173 225 10 1/4 6 13/16 8 7/8
24F 273 173 229 10 3/4 6 13/16 9
24H 260 173 238 10 1/4 6 13/16 9 3/8
24R 260 173 229 10 1/4 6 13/16 9
24T 260 173 248 10 1/4 6 13/16 9 3/4
25 230 175 225 9 1/16 6 7/8 8 7/8
26 208 173 197 8 3/16 6 13/16 7 3/4
26R 208 173 197 8 3/16 6 13/16 7 3/4
27 306 173 225 12 1/16 6 13/16 8 7/8
27F 318 173 227 12 1/2 6 13/16 8 15/16
27H 298 173 235 11 3/4 6 13/16 9 1/4
29NF 330 140 227 13 5 1/2 8 15/16
33 338 173 238 13 5/16 6 13/16 9 3/8
34 260 173 200 10 1/4 6 13/16 7 7/8
34R 260 173 200 10 1/4 6 13/16 7 7/8
35 230 175 225 9 1/16 6 7/8 8 7/8
36R 263 183 206 10 3/8 7 1/4 8 1/8
40R 277 175 175 10 15/16 6 7/8 6 7/8
41 293 175 175 11 3/16 6 7/8 6 7/8
42 243 173 173 9 5/16 6 13/16 6 13/16
43 334 175 205 13 1/8 6 7/8 8 1/16
45 240 140 227 9 7/16 5 1/2 8 15/16
46 273 173 229 10 3/4 6 13/16 9
47 246 175 190 9 11/16 6 7/8 7 1/2
48 306 175 192 12 1/16 6 7/8 7 9/16
49 381 175 192 15 6 7/8 7 3/16
50 343 127 254 13 1/2 5 10
51 238 129 223 9 3/8 5 1/16 8 13/16
51R 238 129 223 9 3/8 5 1/16 8 13/16
52 186 147 210 7 5/16 5 13/16 8 1/4
53 330 119 210 13 4 11/16 8 1/4
54 186 154 212 7 5/16 6 1/16 8 3/8
55 218 154 212 8 5/8 6 1/16 8 3/8
56 254 154 212 10 6 1/16 8 3/8
57 205 183 177 8 1/16 7 3/16 6 15/16
58 255 183 177 10 1/16 7 3/16 6 15/16
58R 255 183 177 10 1/16 7 3/16 6 15/16
59 255 193 196 10 1/16 7 5/8 7 3/4
60 332 160 225 13 1/16 6 5/16 8 7/8
61 192 162 225 7 9/16 6 3/8 8 7/8
62 225 162 225 8 7/8 6 3/8 8 7/8
63 258 162 225 10 3/16 6 3/8 8 7/8
64 296 162 225 11 11/16 6 3/8 8 7/8
65 306 190 192 12 1/16 7 1/2 7 9/16
70 208 179 196 8 3/16 7 1/16 7 11/16
71 208 179 216 8 3/16 7 1/16 8 1/2
72 230 179 210 9 1/16 7 1/16 8 1/4
73 230 179 216 9 1/16 7 1/16 8 1/2
74 260 184 222 10 1/4 7 1/4 8 3/4
75 230 179 196 9 1/16 7 1/16 7 11/16
76 334 179 216 13 1/8 7 1/16 8 1/2
78 260 179 196 10 1/4 7 1/16 7 11/16
85 230 173 203 9 1/16 6 13/16 8
86 230 173 203 9 1/16 6 13/16 8
90 246 175 175 9 11/16 6 7/8 6 7/8
91 280 175 175 11 6 7/8 6 7/8
92 317 175 175 12 1/2 6 7/8 6 7/8
93 354 175 175 15 6 7/8 6 7/8
95R 394 175 190 15 9/16 6 7/8 7 1/2
96R 242 173 175 9 9/16 6 13/16 6 7/8
97R 252 175 190 9 15/16 6 7/8 7 1/2
98R 283 175 190 11 3/16 6 7/8 7 1/2
PASSENGER CAR AND LIGHT COMMERCIAL BATTERIES 6-VOLT(3 CELLS)
1 232 181 238 9 1/8 7 1/8 9 3/8
2 264 181 238 10 3/8 7 1/8 9 3/8
2E 492 105 232 19 7/16 4 1/8 9 1/8
2N 254 141 227 10 5 9/16 8 15/16
17HF 187 175 229 7 3/8 6 7/8 9
HEAVY-DUTY COMMERCIAL BATTERIES 12-VOLT (6 CELLS)
4D 527 222 250 20 3/4 8 3/4 9 7/8
6D 527 254 260 20 3/4 10 10 1/4
8D 527 283 250 20 3/4 11 1/8 9 7/8
28 261 173 240 10 5/16 6 13/16 9 7/16
29H 334 171 232 13 1/8 6 3/4 9 1/8 10
30H 343 173 235 13 1/2 6 13/16 9 1/4 10
31 330 173 240 13 6 13/18 9 7/16

ELECTRIC VEHICLE BATTERIES 6-VOLT (3CELLS)
GC2 264 183 270 10 3/8 7 3/16 10 5/8
GC2H 264 183 295 10 3/8 7 3/16 11 5/8

Two Golf Car batteries from Costco should serve you well.
They are 6v so run them in series. This will generally keep them better balanced than two 12v in parallel. These will give more amp hours, longer life, for less money. GC2 is always a true deep cycle battery made for daily cycling on the golf course.

Harvey,

You say you might have room for two Group 27's?

If so, you just might have room for two Group 31's instead. A couple of these would be the ultimate for you, so you might want to measure your battery area, again, to make sure.

We use a couple of Group 31's and can get by a couple of days without recharging, at least, when drycamping - using a CPAP machine at night, the furnace cycling all night, and while running all the other usual things day and night.

EdTheEdge wrote:

beemerphile1 wrote:
It appears you have a group 27 battery which is only one step up from the minimum group 24.

You have lots of options but physical space is the limitation. What space is available?

I believe I have enough room for two group 27s or two group 24s.... Would two group 24s would be better than the one group 27 that I have now?

Two G24 would supply more AH (amp hour) than a single G27.

Two six volt golf car batteries (GC2) would supply even more AH. The GC2 batteries have the same footprint as G24 but are taller. The GC2 batteries also have thicker plates and should have longer life.

beemerphile1 wrote:
It appears you have a group 27 battery which is only one step up from the minimum group 24.

You have lots of options but physical space is the limitation. What space is available?

I believe I have enough room for two group 27s or two group 24s.... Would two group 24s would be better than the one group 27 that I have now?

MEXICOWANDERER wrote:
How big of space do you have for the battery. In other words is there several inches free above your battery? Is there space enough for two batteries?

The availability of space is a deal-maker or breaker for several possible options

I think there is enough room for two of these:

Duracell Deep Cycle Battery 90AH

I am sure there is enough room for two of these:

Duracell Deep Cycle 12volt 75AH

I am guess that two of either of these batteries would be better than the one I have now.

It appears you have a group 27 battery which is only one step up from the minimum group 24.

You have lots of options but physical space is the limitation. What space is available?

How big of space do you have for the battery. In other words is there several inches free above your battery? Is there space enough for two batteries?

The availability of space is a deal-maker or breaker for several possible options

the battery you mention is not a true deep cyle battery...its a multi purpose battery... it isnt the best for either starting or deep cycle use, but it works well for someone who needs a light, battery with a reasonable charge life when used in moderation... perfect for use in a small system that has very little draw before it gets recharged, like a boat battery.

how many batts do you have room for in the space? as this will determine if you need to stick with 12v or if you can go with 6v batts in series..

the size of the solar charge controller has nothing to do with the size or number of batteries, providing the bank its connected to is 12volt..... to solar charger is sized for how many amps it can safely receive thru it from the panels.

and depending on how much you want to spend, and how many amps you want, will also determine which batteries to buy....

6v batts in series are the most economical in every respect, but there is such a thing as true 12v deep cycle batteries, which I use 2 in my RV (US185HC xc2), which can get you more amps in a limited space....

personally, I would stick with a flooded cell battery, and I would recommend that someone who is just learning how to maintain batteries properly do the same... they have always worked well and will continue to do so for many years to come.
the initial cost of them is cheaper, they will take more abuse, and you dont need to have a charger with special charge profiles... and if you have to replace one because you didnt take care of it right, its cheaper to replace. which with a minimum of maintenance, is rare for a few years.
with all respect to you and others who are learning about their systems, there are just too many "new technology" batteries that are ruined by newbies who dont understand the basics of battery care and maintenance, and that is an avoidable and very expensive learning curve...

Harvey,

Two issues here:
Harris is a battery supplier and I could not find out if what you have is a true deep cycle number. Deep cycle is really rare in a single 12V jar.
Next, do you really need more capacity?

If you need more capacity, see if you can fit a pair of golf cart (GC2) 6V jars in there. It may take so creativity to do so, but it will dramatically increase the amount of power available. You either need to blow big bucks on AGM, or make sure that they can be tended to properly.

Matt