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Unique Power Supply Challenge. Help?

Question asked by Luke Urso in #Coffee Room #Electrical #Electronics on Jun 7, 2020
Luke Urso
Luke Urso · Jun 7, 2020
Rank E2 - BEGINNER

Hi All! I am a ceramic artist building a pottery studio that will be off grid, and mobile (inside a large utility trailer, refitted as my studio/classroom) and I am looking for help solving the issue of supplying power to my Kiln and studio. The kiln uses resistor heating elements, with no fan or motor. It will be fired approximately once every two weeks. A firing requires between 8 and 10 hours of continuous power supply. 


Kiln power demand: 

  • 10,800 watts 
    • 45 amps 
    • 240 volts 


I need to minimize: 

  • Weight 
  • Noise 
  • Size 


And maximize: 

  • Fuel Efficiency
  • Portability (easy to load/unload from trailer)


A large 240v 50amp portable generator would meet the kiln’s power demand but does poorly in all other respects. They’re too heavy, loud, inefficient for general use, and difficult to load and unload from my trailer to be a good option. 


I need help finding an alternative option. One that I’m working with right now is a bank of paralleled inverter generators that I could disconnect when not firing the kiln to save fuel. This is where I’m looking for help.  Is that possible with the power I need?


  • First question: is it possible to get a 240 V power supply out of paralleled 120 V inverter generators?


  • Follow up question: Low wattage units supply 120v. In parallel, amps go up but voltage does not. I know that putting the units in series would raise the voltage. Is it possible to put inverters into series and then parallel them? 


  • Second question, is it possible to parallel more than two inverter generators? 


  • Third, is there an other alternative option out there?


Any answers, suggestions, or guidance welcome! Thanks!


Posted in: #Coffee Room #Electrical #Electronics
Ramani Aswath
Ramani Aswath · Jun 8, 2020
Rank A1 - PRO

There must be a IC engine powered vehicle that moves the trailer. Is it possible to use that engine to drive the generator? If that can be done, the thing becomes a no-brainer.

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