proposed ways to control 'ignore AC Input'

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Martin Gasthuber asked Nov 24, '20

proposed ways to control 'ignore AC Input'

Hi,

building a larger and more complex system (including 3Phase, Solar, CHP machine etc.) i would like to, by software, force the 3 MPII (one on each phase) to enter the 'ignore AC Input' state in order to make sure no power is feed back. The main parameter is the SOC which should drive that state change. I would like to avoid physical relays and cables and use the existing communication between the GX device (Cerbo in my case) and the MP systems. What is the best/easiest/safest way to accomplish this ?

best regards,

Martin

Multiplus-II cerbo gx Venus GX - VGX BYD chp

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Alexandra ♦ commented · Nov 24, 2020 at 12:04 PM

@martghh

It may be possible to exploit this idea

https://www.victronenergy.com/live/drafts:acin_ignore_timer_using_ccgx_gen_start_stop_example

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Martin Gasthuber Alexandra ♦ commented · Nov 24, 2020 at 12:14 PM

Hi Alexandra,

thanks for the link - i've seen this before - it will most probably solve the problem, but still requires cabling and in my case, as i undestood, have to somehow connect the GX relay to all three on the MPII. This is stil not 100% clear to me, how to solve that, but i could not find any indication that 'setting ignore AC in' will automatically propagated to the remaining two MPII in case i cable only to the phase master. Still i would prefer to use the existing GX<->MPII VE Bus link

-- Martin

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Modifications Space

Node Red Space

Answer 1 · 2020-11-26T05:14:58Z

Paul B answered · Nov 26, 2020 at 05:14 AM

your can use the assistants to do different disconnects ie SOC etc etc

this is a example of one site

1606367156047.png (35.2 KiB)

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