Smart phoenix Inverter 12/2000 230v frequency issues

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andy-n asked May 16, '22

Smart phoenix Inverter 12/2000 230v frequency issues

Above inverter is installed in a vehicle, all professionally installed, I have an LG 1000W inverter Microwave installed.

Question: The time (clock) on microwave has increased 45 minutes in about 2 weeks.

Inverter is on factory defaults ie 50Hz as per Australian standard.

Help would be appreciated. More a nuisance issue than operational issue.

cascading inverters

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Answer 1 · 2022-05-16T09:46:51Z

klim8skeptic answered · May 16, 2022 at 09:46 AM

Apparently odd harmonics from inverters will cause accuracy drift in clocks that derive their timekeeping via mains frequency.

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Answer 2 · 2022-05-16T21:52:02Z

southsideph answered · May 16, 2022 at 09:52 PM

All clocks that use the alternating frequency reference can drift. On grid the generating company adjust the frequency during the day to compensate/correct any drift. Unfortunately using an inverter you do not get this compensation/correction so you will always get some drift

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andy-n commented · May 17, 2022 at 01:09 AM

But 45 minutes in 2 weeks, that's a very big time advance. Thanks for yours and other answer.

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klim8skeptic ♦ andy-n commented · May 17, 2022 at 02:41 AM

Maybe run the ac through a power filter board.?

Might work, might not.

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southsideph andy-n commented · May 17, 2022 at 07:05 AM

Unfortunately phase frequency can be affected by many different factors, including load, capacitance, inductance, resistance, cables, tolerance of the components used etc.

Although the stated frequency is 50Hz could be +- 0.1% for example. It is still only the centre point between the two tolerances, which could be 49.5Hz and 50.5Hz, which would either cause a clock (50Hz Referenced) to either loose time or gain time.

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