Alternator and wattage of inverter (4 Viewers)

[skiberg]

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?

 

[WTITW]

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.

 

[jeremy j]

I was doing something similar since I have the 800 watt ecoflow fast charger. I used this as the max load on the alternator. It seems pretty extreme and really never have all this going at once.

• Rear defogger: 15–20 A
• Seat heaters (2 front + rear): 15–25 A
• Cooling fans (high): 20–30 A
• Headlights & HVAC & electronics: ~60–80 A
• Total peak: ≈ 110–130 A

I generally run my DC charger at 400 watts. That's a little over 30 amps. I didn't feel comfortable running it at 60+ amps without upgrading the alternator. I am only charging a 1kwh battery so 400 watts charges plenty fast for me.