6 x 8KW Inverters in 3phase configuration
I need some advice please; sorry for all the questions this installation is still just the planning stage but is quite urgent for kickoff.
Wiring to be in 3phase configuration with one 8KW master and one 8KW slave per phase. (Total 48KW) with 12 x 7KW BSL batteries.
Currently have a 100KW generator with ATS when grid fails. The load that needs inverter backup is mostly offices with loads averaging from 5KW to 25KW. (this is office essential sections) There is another load that does not need inverter backup but does needs generator backup and is normally between 5KW to 40KW. (this is mostly non-essential three phase machines but must still be on generator backup section).
Solar panels might only follow at later stage due to structural roofing that needs to be re-enforced prior to PV panel installation. (panels 97 x 555W Longi's) So for starters basically a UPS setup that can charge batteries also from generator if it's doable.
Can I keep the supply to the inverters via the ATS switch so that should the grid fail to supply the inverters the generator can keep supplying the inverters? or does the generator supply have to be connected to generator aux port on inverter to avoid feedback from inverter to generator.?
Do I bridge master and slave "grid supply in" and "inverter out"?
Can I connect 4 x batteries per phase, and then the three banks to 1 x busbar.
Once at later stage when solar panels are installed about 16 x 555W panels per inverter I am thinking to also have generator as backup supply to charge batteries when weather is bad. Is this possible
Does the Sunsynk app work on 6 x inverters to see total generation, batteries SOC etc.?
Does the Sunsynk still have the functionality to feed back to non-essentials even with the three-phase configuration.
Any info is welcome that could assist me to make this installation possible and to avoid mistakes. Thanks in advance.
Yes the video does focus mainly on the comms aspect.
Your concerns about the phase use in the demo - it is not possible to use a single phase to make 3 phases. You have need a 3 phase supply for this configuration.
Each phase will have 2 inverters - a master and a slave. This make each pair operate as paralleled inverters. this means that the each phase will be connected to the "Grid" port of both inverters. Your load for that phase will be connected to the "Load" port of both inverters. The same will apply for the other 2 phases. You just need to make sure you get the rotation correct which you set on all the inverters. Just keep the Grid and the Inverter isolated from each other while setting this up, just like you would when using a generator as a backup for your installation.
Being a 3 phase system the neutral for the "Grid" connections will be a common neutral. The Neutral from the "Load" ports will also be a common connection. then you need to follow this diagram, but looking at it as a 3 phase solution.
I assume you are an electrician. Designing this type of solution is the realm of an electrical Engineer who has a good working knowledge of hybrid inverters.