Industrial 3 phase 10-30 kVA UPS as inverter in an off-grid machine shop
I am thinking of building my workshop with 3 phase power. I'm looking for the pros and cons to using a large-ish industrial UPS to supply power to my machines.
First...I do not currently have 3 phase requirements. I do not currently have the motors to supply power to the machinery. Though, used/NOS 3 phase motors are very cheap to find. As I understand, 3 phase motors provide more power more efficiently than do 1 phase motors thereby lowering the rated motor HP requirement. So, I'm thinking even if the UPS inverters are not as efficient as purpose-built, off-grid inverters, I still might use less battery power for the same work output.
I am most likely the only one using the shop, so only one machine would be operating at one time. Auxiliary motors that might be operating while machining are air compressor and dust vacuum/fan.
I know I can operate a generator while machining and use a smaller inverter for low power devices like lighting and hand-held tools, but I want to look at the possibilities of using battery power and recharge with solar, wind and conserved energy. I try to use less fossil fuels if I can afford the time or money.
I know I am forgetting to include all the information I should, but I want to get the topic started.
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