Alternator and wattage of inverter (1 Viewer)

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Oct 4, 2025
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Rhode Island/New Hampshire
My calculations, based upon AI assistance, suggest we can handle about an 1800 watt power inverter without changing alternator. For those of you that have added an inverter without changing alternator, how successful have you been?
 
Are you (or the ai model you relied on) simply multiplying 150amps by 12 watts and arriving at 1800watts? That doesn’t account for the trucks loads or the unfortunate fact that the denso alternators used by oem only put out like 60 amps at idle. @r2m has a 3k inverter, but also has HO alt and dual battery.
 

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