Lets compare cost effectiveness between Car Battery and SLA Battery in Solar Storage Project.
In Singapore, a new 12V45Ah Car Battery cost $100, while a new 12V7.2Ah SLA Battery cost $19.
For SLA Battery, 12V7.2Ah is the sweet spot, its most common and has best Px/Capacity ratio compare to other voltage/capacity combination.
[su_table]| Compare | Car Battery | SLA Battery |
| Type | 12V45Ah | 12V7.2Ah |
| Price | $100 | $19 |
| Save Discharge | 30% | 80% |
| Usable | 13Ah | 5.76Ah |
| Size | Big 207Lx175Wx190H 30KG | Small 150Lx65Wx93H 1.22KG |
3 x 7.2Ah SLA Battery is able to do the job of a 45Ah Car battery at smaller cost, space and weight.
SLA 12V12Ah Discharge Time VS Discharge Current
State of Charge on charging
State of Charge on dis-charging
Car Battery