This is not a Redflow specific issue.
The AS4777 MultiPlus-II series units may fail / stop (Error #11 reported on the CCGX) when AC power is connected and the AS4777 relay test is engaged during startup.
See this link for more information:
There are multiple reasons for this error and this failure mode. You need to check through the list per the link above.
There is, however, a specific and subtle one that is unusual compared to 'typical' battery inverters installed on-grid in Australia. The MultiPlus-II series, by default, requires that there is no hardwired neutral path between the input and output sides of the unit.
The MultiPlus-II checks for this situation specifically and will stop with Error 11 if it detects such a hardwired neutral is present. Most other Australian battery inverters either expect such a neutral path to exist or at least allow for it to exist.
Ensuring the MEN test will 'pass' for these units normally requires:
- Ensuring there is no neutral link connecting the input and output sides of the MultiGrid/MultiPlus-II
- Ensuring that any 'system bypass' switch installed externally to the Victron system (not, at face value, a bad idea in case of Victron hardware issues in the future) is a double pole switch, so that the neutrals are not connected ‘across’ the MultiGrid due to the presence of the bypass switch.
There are some Australian situations where local wiring rules and/or physical logistics for the installation (e.g. multiple separate buildings in a campus) are such that it is technically or legally impossible to avoid there being a hardwired neutral path and/or a downstream MEN on the site.
Victron Energy have (as at May 2019) have provided Redflow with:
- A special 'workaround' firmware version that permits the neutral path to be hardwired (as an interim approach). Contact Redflow support to obtain this workaround firmware if you have no other way to get a MultiPlus-II site 'past' an Error 11 caused by an unavoidable requirement on your site for a hardwired neutral to exist.
- A commitment to implement ( in a future firmware release and VEConfigure version) software support to allow these units to operate with a hardwired input-to-output neutral path as a fully supported option.
Note: There are other reasons for Error 11 as well - your 'error 11' may also be because of one of those other reasons noted at the Victron link above - so it is a good idea to work through that entire diagnostic step set provided on the Victron site.
If you are an installer who wants to load that 'workaround' firmware, you can obtain from this folder.