230Ah to Wh — 2,760 Wh at 12V
230Ah stores 2,760 Wh at 12V, 5,520 Wh at 24V, and 11,040 Wh at 48V. Below: usable energy per chemistry, what it runs, and how the same energy is built from standard modules.
230Ah at 12V is 2,760 Wh — that is 2.76 kWh of nameplate energy.
Formula: Wh = Ah × V. The voltage is the nominal battery voltage, not the charging voltage.
A real LiFePO4 module of 230Ah is usually labelled 2,944 Wh, because its nominal voltage is 12.8V rather than a round 12V. Both 2,760 Wh and 2,944 Wh describe the same battery.
Result
Energy in Wh equals capacity in Ah multiplied by battery voltage. 1000 Wh equals 1 kWh.
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Design Your SystemAt every system voltage
The same capacity stores four times the energy at 48V that it does at 12V, and draws a quarter of the current for the same load.
| System voltage | Capacity | Energy | kWh |
|---|---|---|---|
| 12 V | 230 Ah | 2,760 Wh | 2.76 |
| 24 V | 230 Ah | 5,520 Wh | 5.52 |
| 48 V | 230 Ah | 11,040 Wh | 11.04 |
How much of it you can actually use
Nameplate energy is not usable energy. Depth of discharge caps what you may take out before you damage the battery, and it differs by chemistry.
| Chemistry | Depth of discharge | Usable energy | Usable capacity | Cycles at that DoD |
|---|---|---|---|---|
| LiFePO4 | 80 % | 2,208 Wh | 184 Ah | ~3,500 |
| AGM | 50 % | 1,380 Wh | 115 Ah | ~600 |
| Gel | 50 % | 1,380 Wh | 115 Ah | ~800 |
| Flooded lead-acid | 50 % | 1,380 Wh | 115 Ah | ~400 |
What that runs
Runtime from the usable LiFePO4 energy at 12V (80% depth of discharge), one load at a time, no inverter losses on the DC rows.
| Load | Power | Runtime |
|---|---|---|
| LED lighting | 15 W | 147.2 h |
| 12V compressor fridge (average) | 45 W | 49.1 h |
| Diesel heater (fan and glow plug average) | 30 W | 73.6 h |
| Water pump (while running) | 65 W | 34 h |
| Laptop plus router | 75 W | 29.4 h |
| Kettle through an inverter | 1200 W | 1.8 h |
What this size is in practice
230Ah has two origins: the classic flooded traction pair (2 x 115Ah) that older motorhomes shipped with, and a popular single LiFePO4 module size today. The nameplate is identical, the usable energy is not - 115Ah versus 184Ah.
Building the same energy from standard modules
How many standard 100Ah 12V modules add up to this energy, and what capacity that becomes at each system voltage.
| System voltage | Capacity | Standard modules |
|---|---|---|
| 12 V | 230 Ah | 2 x 100Ah / 12V |
| 24 V | 115 Ah | 2 x 100Ah / 12V |
| 48 V | 57.5 Ah | 2 x 100Ah / 12V |
Other capacities (Ah)
Other energy values (Wh)
FAQ
How many Wh is 230Ah?
230Ah is 2,760 Wh at 12V, 5,520 Wh at 24V, and 11,040 Wh at 48V. Multiply the amp-hours by the nominal battery voltage: Wh = Ah × V.
How much of that 2,760 Wh can I use?
On LiFePO4 at 80% depth of discharge you get 2,208 Wh (184 Ah at 12V). On AGM or gel at 50% you get 1,380 Wh (115 Ah). Same nameplate, very different usable energy.
How long does that run a 12V fridge?
A compressor fridge averaging 45 W runs about 49.1 hours on the usable LiFePO4 energy at 12V. Cycling depends on ambient temperature, so treat this as the upper bound for a well-insulated unit.
Why does the datasheet say 2,944 Wh instead of 2,760 Wh?
Because LiFePO4 has a nominal voltage of 12.8V per 12V module, not exactly 12V. 230Ah × 12.8V = 2,944 Wh. The 12V figure of 2,760 Wh is the conservative system-voltage calculation. Both describe the same battery.
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