Dave, a 400 watt inverter supposedly can (if you believe the advertising and that 400 watts represents output????, its NOT a perfect device, it puts out less energy then supplied to its input remember, theres heat losses) at 120 volts, supply up to 400 watts which at 120 volts = 3.33 amps continuous AND WITHSTAND IT AND DELIVER IT AND NOT OVERHEAT OR OVERLOAD......... IE it can deliver 400 watts of power which is volts x amps if theres a resistive load.
BUT THATS ONLY HALF THE ANSWER It can take 12 volts DC and invert it to 120 VAC and deliver 3.33 amps at that voltage (assuming the 400 watts is its output rating) BUT ONLY SO LONG AS THE BATTERY CAN DELIVER SUCH. The battery only stores x amount of energy so once thats depleted NO TICKY NO LAUNDRY. A typical stored energy battery rating may be in Amp Hours and if you know that number and the inverter specs and losses, then you can compute for how long the inverter can deliver 400 watts of 120 VAC output power.
The 400 watts inverter rating is its power delivery measurement/capacity NOTTTTTTTTTT the Amp Hour energy storage ratinG of its internal battery.
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Today's Featured Article - Upgrading an Oliver Super 55 Electrical System - by Dennis Hawkins. My old Oliver Super 55 has been just sitting and rusting for several years now. I really hate to see a good tractor being treated that way, but not being able to start it without a 30 minute point filing ritual every time contributed to its demise. If it would just start when I turn the key, then I would use it more often. In addition to a bad case of old age, most of the tractor's original electrical system was simply too unreliable to keep. The main focus of this page is to show how I upgr
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