OFF GRID INVERTER THAT CAN DO 277/480 VOLTAGE

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Designer101

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California
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Solar and ESS Designer
we ran into issue where we have to run the 120 kw off grid,
the main Load is 100HP motor, but when we measure the current it shows 144A Phase to phase.
the voltage is 277/480
now we ae not finding any inverter that do this bigger size and delivers the 277/480 voltage.
has any body any idea how they design industrial battery systems.
Any idea sharing will be really helpful.
 
While I'm not a solar/invertor expert, I think it will be a tall order to find an invertor that can handle the inrush of a 100 HP motor starting across the line unless this is part of a much larger system. Maybe with a soft start. I'll defer to the solar/invertor experts here .
 
Solar PV net meterers in reality are quite the free loaders where they sell kWh at retail price or higher, but depend on the utility to provide the reactive power and demand.
 
There are systems that can do this, a Telsa Powerpack or Megapack for instance. But to run that 100hp motor you are looking at a minimum 360kVA BESS.
 
Designer101 said:
we ran into issue where we have to run the 120 kw off grid,
the main Load is 100HP motor, but when we measure the current it shows 144A Phase to phase.
the voltage is 277/480
now we ae not finding any inverter that do this bigger size and delivers the 277/480 voltage.
has any body any idea how they design industrial battery systems.
Any idea sharing will be really helpful.
Click to expand...
See PVnoob's post if you have more than half a million dollars to spend on this.
 
pv_n00b said:
There are systems that can do this, a Telsa Powerpack or Megapack for instance. But to run that 100hp motor you are looking at a minimum 360kVA BESS.
Click to expand...
Ya i understand that, I need some more information so that i can give some concerto answers.
 
pv_n00b said:
There are systems that can do this, a Telsa Powerpack or Megapack for instance. But to run that 100hp motor you are looking at a minimum 360kVA BESS.
Click to expand...
exactly. They really need to impose more reactive power charges upon net meter accounts.
 
jaggedben said:
This thread has zilch to do with net metering.
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Designer101 said:
exactly, its complete off grid topic.
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I think the point was informational in the perspective that you can get away with things if it were net metering that you won't get away with if totally off grid.

also if your 100 HP motor is drawing 144 amps, you must be into the service factor range of it. Unless it is a limited duty application probably need to be prepared to replace that motor as well.
 
Designer101 said:
Ya i understand that, I need some more information so that i can give some concerto answers.
Click to expand...
You asked if anyone had experience designing industrial battery systems. I do and I gave you the tldr. The equipment is available, it's a matter of if your client wants to spend that kind of money because it will be expensive. We can't give you a full system design here.
Also, 144A for a 100hp 480V motor is pretty high for FLA and low for locked rotor current. You don't measure current phase to phase, you read it in series in a phase. Voltage is measured phase to phase. Something is off here.
 
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