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EEVblog 1518 - Hoymiles Solar Microinverter TEARDOWN

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Phoenix:

--- Quote from: thm_w on December 08, 2022, 10:04:20 pm ---Yeah looks like the actual spec is +10/-6%, and preferred +6/-2%. Not sure where I got 1.1.

--- End quote ---

The domestic voltage spec is not the passive anti-islanding limit. I will discuss (to the best of my memory) Australia.
In terms of over voltage disconnection there are 2 fast limits and one 10 minute average limit.
>275V instantaneous - 200ms
>265V for 1s - 1s
>258V (adjustable) for 10 minutes - 3s
In terms of under voltage two limits plus specific ride through requirements
<180V for 10s - 1s
<70V for 1s - 1s
I don't remember ride through it's complicated.

In terms of frequency the disconnect range is 47hz and 52hz, with similar delays. Oh and 4hz/s rate of change of frequency.

(note that reconnection limits are different, and based on the grid spec).

The regions I've studied (Aus, Europe, North America) all have similar limit set ups, of course with different values.

Most regions also require active anti islanding (except UK). This requires the inverter to inject a disturbance signal into the grid and monitor the effects. This allows it to detect scenarios where, when an accidental islanded load matches the inverter generation, the voltage and frequency limits are still in range.

el737:
Hi,
I hope it is ok to ask here - can anyone please tell me which wire diameter would be safe to use from the Hoymiles 800 to the outlet? I have read about it, but it would be nice to hear from someone who is using this or similar inverter for a while.
Thanks

thm_w:

--- Quote from: el737 on February 24, 2023, 03:30:58 pm ---Hi,
I hope it is ok to ask here - can anyone please tell me which wire diameter would be safe to use from the Hoymiles 800 to the outlet? I have read about it, but it would be nice to hear from someone who is using this or similar inverter for a while.
Thanks

--- End quote ---

It says 12AWG in the manual, no?
Anything else will depend on your local rules and regulations.

el737:
Didn't get the manual. But the confusion always comes from the fact that in the original package the manufacturer included no-name no-label stranded cable that seems even thinner than 14AWG  ::)
I thought of using 12, just wanted to confirm since that is one of the rare electric things I've never worked with (solar systems).
Thanks

thm_w:

--- Quote from: el737 on February 27, 2023, 07:03:20 am ---Didn't get the manual. But the confusion always comes from the fact that in the original package the manufacturer included no-name no-label stranded cable that seems even thinner than 14AWG  ::)
I thought of using 12, just wanted to confirm since that is one of the rare electric things I've never worked with (solar systems).
Thanks

--- End quote ---

https://www.hoymiles.com/wp-content/uploads/downloadupload/User%20Manual_HM-600-700-800_Global_EN_V202206.pdf

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