A little project I have designing and starting to collect parts for. Projected project start date is no later than September. The scope of this machine is to be able to provide remote high voltage AC power with 2,000 watts of inverter power, allow welding with stick, TIG and mig when I get a wire feeder. Recharge battery banks up to 48v and provide raw 12 volt power for engine starting. This will be powered by the engine I am looking at, a gasoline powered air cooled 25hp Subaru V-twin engine with 30 amp magneto charger and two butchered externally rectified, externally excited AD244 alternators. Exciter field current will be provided by a 10 amp field voltage regulator, for CV which is constant voltage, such as for battery charging, engine cranking and mig welding. CC or constant current will be provided by a rheostat or PWM. The little diagram I attached is just 1 alternator system. The 2 alternator system will pretty much be copies of each other and they have their outputs combined for higher power use, or the alternators can be split up for two people to weld at the same time or to use one alternator for welding and the second alternator for 12v power generation to power the inverter to run a run a power tool such as a grinder. To save fuel at lower power requirements I will unbelt one alternator. It takes about 3 horsepower just to free spin one alternator at full speed. So unhooking 1 alternator could save up to 1.5 pounds of gas per hour or 1 gallon of gas every 4 hours. Target speed on the alternators will be 9,000rpm at full speed, requiring a 1 to 2.5 engine over drive. Not shown: CEMF suppression diodes on all the coils and protecting the rectifier. MOVs placed on the alternator output power source for the mV shunt amp meter, Anderson connector on the output, the rheostat may be a PWM controller, a remote voltage sense, I may end up having more than 2 arc reactor choke coils and capacitors. Capacitors will have bleed down resistors and diode protection. All the fine details that keep things like voltage regulators, volt meters from frying and capacitors from exploding on welding applications. The 100ohm resistor my be a light bulb for a while if I don't have a 100 ohm 200 watt or larger resistor on hand.