Builiding of a complete 6kW PV inverter with MPPT chargers

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Murphy's friend


Joined: 04/10/2019
Location: Australia
Posts: 612
Posted: 07:54am 05 Feb 2024      

Hi Mat,

I too would suggest you stick to 1 Tesla flux density.

Your core cross section, at 45 sq cm, is a bit small but will do. For example, my 6KW inverter uses a toroid with 63.9 cm sq cross section.

Assuming you have 220V 50Hz mains power in Poland then, for your core, you need to wind 220 turns for your secondary and 24 turns for your primary.

You certainly have plenty of hole space to get your windings through.

My core has a 100mm hole but with less turns required for 1 Tesla (160t secondary./ 18t primary.) I managed to fit all with a little space left.

Have fun winding, its heavy work with that core but there is plenty of advice on this forum how to go about it.