There are Pros and Cons in using either AC or DC current in the Aftertime, or Both, but DC has Simplicity and requires Less Maintenance. Even devices such as computers and Monitors can and do run on DC at 12V, but there are Exceptions. However, DC current can't travel long distances so the source must be in Close Proximity to the application. AC alternatively requires a Steady Source and AC Generators are thus tricky, but many devices have high Startup Current requirements which AC provides. Inverters can be purchased from many sources, but Switching between DC/AC creates power loss, and the right Inverter Choice saves power. A Step Up converter can then boost to 220 AC, and a Auto Alternator can be used in this manner. To use a 3 Phase induction motor to convert DC to AC, perform a Bench Test on a DC Generator, then keep 2% Above Sync to prevent Brownout and maintaining a proper Slip Speed Ratio. A UPS can help prevent brownout too. Computer Reel to Reel motors can also be used to convert DC to AC, where Voltage, AMPs, and the RPM generated are variables. A Low RPM alternator can be constructed.