Specifications

50
Figure 37 - Spiral Cell vs. Rectangular Cell AGM Battery
Permission Pending
Because of the benefits of a spiral cell AGM battery over a rectangular cell AGM
battery, the decision was made to use a spiral cell. The most popular and widely
available manufacture is Optima. To help in making a final decision on a specific battery
to use in our design, we created a comparison chart for all the different deeps cycle
batteries Optima makes. We calculated and included the Ampere-Hour/cubic inch,
Ampere-Hour/Pound, and Ampere Hour/dollar for each battery as well. This chart can
be viewed in the figure below.
Optima Battery Comparison
Battery
Capacity
(Ah)
Weight
(Lbs)
Voltage
(V)
Volume
(cm
3
)
Price ($)
AH/cm
3
AH/Lb
AH/$
D27M
66
53.8
13.1
715.15
208.89
0.09229
1.2268
0.316
D31M
75
59.8
13.1
782.63
221.40
0.09583
1.2542
0.3388
D34M
55
43.5
13.1
540.68
181.34
0.10172
1.2644
0.3033
D31A
75
59.8
13.1
778.48
215.29
0.09634
1.2542
0.3484
D31T
75
59.8
13.1
778.48
218.08
0.09634
1.2542
0.3439
D34
55
42.9
13.1
535.22
181.42
0.10276
1.2821
0.3032
D34/78
55
43.5
13.1
539.93
178.19
0.10187
1.2644
0.3087
D35
48
36.4
13.1
480.599
164.74
0.09988
1.3187
0.2914
D51/D51R
38
26
13.1
413.23
158.07
0.09196
1.4615
0.2404
D75/25
48
37.8
13.1
486.25
169.69
0.09871
1.2698
0.2829
D27F
66
53.2
13.1
707.75
235.00
0.09325
1.2406
0.2809
Figure 38 - Optima Battery Comparison