How long can you weld before a single battery is dead? I'd imagine running the rig would greatly extend run times?
Not to give away your secrets, but is it just as simple as something like this?
Wide input voltage from 11 to 16V Work for appliances from 0AMP to 40AMP automatically 100% full rated power 100% full stable output current 100% burn-in test High-efficiency up to 95% Waterproof sealed Cooling by free air convection Surface mountable 2-year warranty Over-current, over-voltage...
daygreen.com
If so, I'd like to add one to my regular stick setup, vs needing 2 batteries.