Multiplus II and Fronius Symo 10.3 - Modbus Questions.

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dee-ess asked Mar 20, '20

Multiplus II and Fronius Symo 10.3 - Modbus Questions.

I am designing a 10 kW PV no break supply system including 3 x MP II's (ESS AC PV on ACout 1), whereby I will have extra PV available at times. I have the availability to thermally bank any excess, when certain conditions are met, through my home automation system.

I have looked at the MODBUS map but cannot determine which of the fields will give me total PV output from the Fronius.

Any help on which fields I require to initiate a control command when PV output is greater than total load requirements, would be greatly appreciated.

Multiplus-II Modbus TCP Fronius

2 |3000

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Modifications Space

Node Red Space

Answer 1 · 2020-03-20T16:14:42Z

ehsab answered · Mar 20, 2020 at 04:14 PM

1phase (and MPs in parallel) or 3phase?

If 3phase how will you adhere to the 1:1 rule?

2 |3000

Attachments: Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

Answer 2 · 2020-03-21T10:35:14Z

dee-ess answered · Mar 21, 2020 at 10:35 AM

3 Phase system. 3 Multiplus II 48/5000/70-50 in parallel (15kVA), 10kWP PV. Each of the Inverter phases connected to each of the MP's ACout's.

2 |3000

Attachments: Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

Answer 3 · 2020-03-25T08:24:48Z

dee-ess answered · Mar 25, 2020 at 08:24 AM

Has anyone got an answer to my question?

2 |3000

Attachments: Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

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