Is there any way i can run a 1.5 Hp motor from my MultiPlus-II 12/3000/120-32 230V?

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tommyb asked Dec 13, '22

Is there any way i can run a 1.5 Hp motor from my MultiPlus-II 12/3000/120-32 230V?

Hi All,

I'm just trying to size up a Cat pump for my watermaker and want to know what I can effectively run from my inverter.

I have 4 x 12v 200AH lifepo4 batteries with maximum 2540W output (according to the manufacturer).

The majority of motors I'm looking at have a start-up load of around 50A at 1750RPM, Before settling in at about 7A. I'm wondering if I can put a soft start in-line somewhere to bring the start-up load down to a workable range. If not, Is it possible to have a 2.2kva Suitcase generator hooked up to the inverter, allowing the inverter to pull power from the generator and battery bank for the start-up, then turn the generator off to allow my batteries to continue feeding the motor for a few hours to fill my tanks?

Any other suggestions would be much appreciated!

Thank you, Tom

inverter current draw

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Answer 1 · 2022-12-14T06:28:39Z

Michelle Konzack answered · Dec 14, 2022 at 06:28 AM

Not a MultiPlus but a Phoenix Inverter 24/3000 and it worked with a 1500W Garden Chopper from Husquarna.

The Inverter housing make a short "bang" which comes probably from the extrem high magnetfiekd of the toridial transformer, but since the Phoenix/Multiplus have a nice overload capability, it should work.

If not, you will need a matchibg soft start electronic for your Motor

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Answer 2 · 2022-12-17T09:01:59Z

tommyb answered · Dec 17, 2022 at 09:01 AM

Thank you for your response, Much appreciated!

I'll just buy the motor I think, Then throw a clamp on it to see what it comes back with for the start-up amps. I found out elsewhere that if all else fails, I CAN have a generator hooked up to the inverter, which will help with the initial start-up of the motor (up to 32A), then I can switch that off and let the batteries continue feeding the motor.

Thank you again for the response, Tom

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nickdb ♦♦ commented · Dec 17, 2022 at 09:09 AM

The generator is unlikely to respond fast enough for the surge current. I would not bet on that working.

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Kevin Windrem commented · Dec 17, 2022 at 04:37 PM

Most multimeters are not fast enough to register the true peak current. For that you need an oscilloscope and a clamp-on current probe.

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