Dynamic ESS, PV coupled, facade & roof PV fields

Show us your system
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1

Hi, community

My system
It is quite complex, using Dynamic ESS to get planned power outages from grid provider in order to define “no charge” timeslots and force DESS to pre-charge batteries accordingly

Diagram

graph TD
    subgraph AC Coupled Station 1
        subgraph Phase L3
            PV1[920W 2x460W Mono] --> MPPT1[Victron Smart MPPT 150/70]
            PV2[3680W 8x460W Mono] --> MPPT2[Victron MPPT RS 450/200]
            PV3[4640W 8x580W Mono] --> MPPT2
            PV4[4640W 8x580W Mono] --> MPPT2
            
            MPPT1 --> LynxBMS[Lynx Smart BMS 500]
            MPPT2 --> LynxBMS
            EM24[EM24 Meter] --> Inverter1[Voltronic Axpert King 5000]
            Inverter1-->Victron
            PV5[2850W 10x285W Poly] --> Victron[Victron MultiRS]
            PV6[2850W 10x285W Poly] --> Victron[Victron MultiRS]
            LynxBMS --> Battery1[28.5kWh LiFePO4 3x parallel sets]
            Cerbo1[Cerbo GX] --> CAN1[Daisy Chain CAN Bus]
        end
        subgraph Daisy Chain CAN Bus
            CAN1 -.- MPPT1
            CAN1 -.- MPPT2
            CAN1 -.- Victron
            CAN1 -.- LynxBMS
        end
    end

    subgraph AC Coupled Station 2
        Victron --> MultiPlus[MultiPlus-II 3000/48]
        MultiPlus --> Battery2[Pylontech US5000 & US3000C]
        Cerbo2[Cerbo GX]
    end

Video showcase

Happy to answer questions and thanks to the local Ukrainian community as well as Victron community for answers to a lot of my questions

8 Likes
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Added +3-kWh lifepo4

Now system is on 58.5kWh battery

1 Like
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Changed DESS auto schedule syncing for the planned grid cuts - now I use negative prices in order to force DESS to never plan any charging from grid at a time when there is no grid planned

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If you decide to add to DESS schedule of grid cuts for #ukrainian community - I’d appreciate @Barbara
Long story short - we have a schedule from grid providers when grid won’t be available due to stabilisation needs, so in order for me to make DESS working properly I need to game with DESS fixed prices via Node-RED with help of @dfaber and put some fake negative prices to it for DESS to never use timeframes for planned charging/feed-in

1 Like
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Finally, thanks to Roy and @dfaber we can toggle MultiRS via NodeRED and serially connected systems can properly react to grid cuts

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Full video about what I was able to accomplish in NodeRED in order to

  • control planned/unplanned grid outages
  • use Excess solar in second system to charge batteries
  • Automatically update prices in DESS
  • Overcome Passthrough mode in MultiRS when VM meter is offline

See video

1 Like
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Installed secondary MultiRS - serially connected
First ( left - DESS + ESS ). Second ( right, PowerAssist only)

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7

Nice setup, great to see the Multi RS in a DESS setup. Is DESS already fully supported on the Multi RS? I understood that the DESS features are running behind compared to the Multiplus II devices. What is your experience?

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DESS is fully supported in recent firmwares
There are some limitations ( no parallel setup ) - that’s why I do use MultiRS in serial in order to get 6kW+6kW with PowerAssist on a single phase

9

Great video Andrii.
When you were on your roof, what is the cable or rod that runs down the middle of the ridge flashing? It looks like it is held by brackets every 1m or so, by insulated rings maybe?
Is it lightening protection?

1 Like
10

It is lightning protection, yeah
It’s 10mm diameter aluminium cable, installed by the edge of the roof in order to help possible strike to bounce off the roof into water drainaige towards the ground
There is a video of roof safety where I do explain of how it is organised -it is in Ukrainian, so feel free to enable subtitles and translation of subtitles to your language. Or ask questions, I’ll do some photos if needed