If battery inverter is a Multiplus, then that can have MPPTs connected to other solar panels too.Here is the DC coupled part:
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Also I do not know if you from US or EU or ... For US there is Sol-Ark hybrid inverter too.
You seem to have a good understanding of the Multiplus capability so I hope you don’t mind if I ask my question here:
I’m looking at a parallel-connected architecture such as the one you posted above to support zero-export using a meter on the grid input. And from what you have posted in this thread, it seems like the Multiplus will support that capability. I have some question perhaps you can help with:
-what meters does the Multiplus support and what communication protocol is used between the meter and the multiplus (RS4985)?
-does the multiplus support any meters based on CT sensors or only in-line type meters?
My other question is to understand whether the Multiplus can also support zero-export by controlling battery charge current with AC-coupled solar.
If you look at this diagram for Huayu’s AC-battery charger:
https://m.huayu-solar.com/Content/uploads/2021694206/PDF/AC-Coupled-Quick-Installation-Guide.pdf
They use two CT sensors, one to monitor grid import/export and a second to monitor AC-coupled solar generation.
This allows them to prioritize solar generation to offset load consumption first and then to use any excess solar generation to charge the battery second (so battery is charged by excess AC-coupled power only, not by importing grid energy).
Is the Multiplus able to do anything similar?
I’m pretty sure the Solark can support similar capability but I am looking for a smaller / lower cost AC-coupled battery inverter that can support zero-export and zero-import as long as there is sufficient AC-coupled solar generation available).
Found this:
https://www.victronenergy.com/uploa...tem/ESS_design_and_installation_manual-en.pdf
Sounds as though the Multiplus will support the variable-charging-for-zero-export capability I’m looking for:
‘When there is more PV power than is required to run loads, the excess PV energy is stored in the battery. That stored energy is then used to power the loads at times when there is a shortage of PV power.’