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If you are  talking about just the battery, with the car not powered ON, it can put out way more than 1200W.

How long? That is the question.


If you are talking about the APM , or DC to DC converter, then those numbers are close to the rated 100A or 120A figure published.

But this is at ~ 13.8 VDC.


Either way a 1200 W inverter is a safe max, imoh....


Lead acid car batteries don't publish an Ahr or kWh rating as such. The Reserve Capacity, RC, is a similar rating at a constant (?) 25 or 20 A draw down to a (?) 10.5 V cutoff point.

You can convert RC to kWh,


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