Very wrong
There is no way to state Ah capacity without giving the discharge rate of the test used. So 120Ah at 0.3C might be 110Ah at 2C, or 90Ah at 5C. See Peukert's Law.
Assume min/max voltage spec'd as the boundaries as well.
At 120Ah, 0.3C is 36A.
So if 110Ah, 2C becomes 220A
And if 90A 5C means 450A
Amps * Volts gives Watts
Ah *V = Wh
divide by 1000 to get kWh
For range only use 80% of capacity, and realise that will get reduced maybe 20% per year, accumulatively compounding.
There is no way to state Ah capacity without giving the discharge rate of the test used. So 120Ah at 0.3C might be 110Ah at 2C, or 90Ah at 5C. See Peukert's Law.
Assume min/max voltage spec'd as the boundaries as well.
At 120Ah, 0.3C is 36A.
So if 110Ah, 2C becomes 220A
And if 90A 5C means 450A
Amps * Volts gives Watts
Ah *V = Wh
divide by 1000 to get kWh
For range only use 80% of capacity, and realise that will get reduced maybe 20% per year, accumulatively compounding.