May 10May 10 Does anybody know if one can use a Solis 15kw 3P LV Hybrid Inverter, wired as grid-tie, i.e. with no battery and grid input, AC-coupled to 3 x Victron 5 kVA Multis, to do the frequency derating by the Multis? The system is totally offgrid, just with a generator input once in a while when they need it.
May 10May 10 46 minutes ago, Pierre10 said:Does anybody know if one can use a Solis 15kw 3P LV Hybrid Inverter, wired as grid-tie, i.e. with no battery and grid input, AC-coupled to 3 x Victron 5 kVA Multis, to do the frequency derating by the Multis?Looks like the Multiplus 2 and S6 can do what you want. It seems unconventional to have a composite three phase setup control a single three phase inverter. Why not replace the Multiplus inverters with the S6? While on generator, you won't be able to phase shift.
May 10May 10 1 hour ago, Pierre10 said:Does anybody know if one can use a Solis 15kw 3P LV Hybrid Inverter, wired as grid-tie, i.e. with no battery and grid input, AC-coupled to 3 x Victron 5 kVA Multis, to do the frequency derating by the Multis? The system is totally offgrid, just with a generator input once in a while when they need it.Yes, it should technically work if the Solis firmware supports frequency-watt derating (frequency shifting / droop control) in island mode, and many people have AC-coupled Solis units to Victron systems successfully. But I would definitely verify the exact Solis model + firmware because some regional Solis firmware versions historically did not respond correctly to Victron frequency shifting. Also ensure the PV inverter sizing (factor 1 rule) is sensible relative to the 3 × 5kVA Multis and battery bank.
May 10May 10 10 minutes ago, frivan said:Looks like the Multiplus 2 and S6 can do what you want. It seems unconventional to have a composite three phase setup control a single three phase inverter. Why not replace the Multiplus inverters with the S6? While on generator, you won't be able to phase shift.Thanks, frivan. I’ve done it before with 3 × Quattros and a Solis grid-tied inverter. In this case, they are not MultiPlus-II units. The roof with the PV panels connected to the Victron charge controllers is full; therefore, we want to use another roof for the Solis. That way, one only has to run a communications cable to the Victrons, about 40 m away. This also increases the available daytime power by 15 kW, and taking load off the Victrons. Edited May 10May 10 by Pierre10
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