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Forum Index : Electronics : High Power Inverter to Start 2HP Pump

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Solar Mike
Guru

Joined: 08/02/2015
Location: New Zealand
Posts: 1246

Posted: 10:23pm 23 Aug 2026

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analog8484 said
Looking forward to seeing the build. It's a bit surprising to see a 40uH inductor given the 40kHz switching frequency. Based on the ~47uH inductor sizing for the 20kHz switching frequency used in the more recent nanoverter builds, it seems a significantly smaller inductor could be used for 40kHz. Increasing the switching frequency is one thing I've wondered about for the nanoverter as a way to reduce the quite large inductor size used in the recent builds.

Edit: I consulted an AI, ChatGPT, it recommends using 2 x 10uH inductors

Mike
Edited 2026-08-24 09:08 by Solar Mike

Godoh
Guru

Joined: 26/09/2020
Location: Australia
Posts: 699

Posted: 11:37pm 23 Aug 2026

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Hi Mike, just wondering , as you said you have plenty of batteries and are going to make up a 110 volt bank or so. Whether a GTI inverter running off that bank of batteries would have enough grunt to help start the pump.
You would need to have some sort of method of getting the GTI to start up before you tried to start the pump, but it may just give enough kick to get you over the line.
Pete

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