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On-grid domestic battery storage

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  • EVandPV
    EVandPV Posts: 2,112 Forumite
    Fifth Anniversary 1,000 Posts Name Dropper
    Your right about a script, Octolux. https://github.com/celsworth/octolux
    It'll do the same thing as the Lux Power Pod and charge your batteries from the grid at the cheapest Octopus Agile times.
    If it looks like your Lux is grid charging, go onto the web portal (http://server.luxpowertek.com/WManage/web/monitor/inverter) and turn off grid charging on the 'maintain' tab. You can also do it on the app which your installer should have set up for you.
    Scott in Fife, 2.9kwp pv SSW facing, 2.7kw Fronius inverter installed Jan 2012 - 14.3kwh Seplos Mason battery storage with Lux ac controller - Renault Zoe 40kwh, Corsa-e 50kwh, Zappi EV charger and Octopus Go
  • Starfrog
    Starfrog Posts: 228 Forumite
    Third Anniversary 100 Posts Name Dropper
    Is it normal for the pv to show power still going to the house  ? I have it set as off but still charges it when it’s below 10% I think. ? How exactly do I use the script ? I have so many questions but thank you for info 
    ——-
    12 x JASolar 455w Panels (5.46kWp south facing array) Enphase Microinverters IQ7+, Lux AC ESS 3.6kW, 5 x 2.4kwh = 12kWh Plyontech US2000C Battery storage, Lochinver far North, west coast of Scotland 
  • Starfrog
    Starfrog Posts: 228 Forumite
    Third Anniversary 100 Posts Name Dropper
    This is the PV showing output ! Right now in the dark !! 
    ——-
    12 x JASolar 455w Panels (5.46kWp south facing array) Enphase Microinverters IQ7+, Lux AC ESS 3.6kW, 5 x 2.4kwh = 12kWh Plyontech US2000C Battery storage, Lochinver far North, west coast of Scotland 
  • EVandPV
    EVandPV Posts: 2,112 Forumite
    Fifth Anniversary 1,000 Posts Name Dropper
    Starfrog said:
    Is it normal for the pv to show power still going to the house  ? I have it set as off but still charges it when it’s below 10% I think. ? How exactly do I use the script ? I have so many questions but thank you for info 
    Under the default configuration, your pv will supply your house with whatever power it needs first then any excess will charge your batteries. Once your batteries are full, any excess goes out to the grid.
    Your batteries shouldn't be charging below 10%. If they are,  check the discharge settings on the portal under 'maintain' and make sure the 'cut off SOC' is set to at least 10%. 
    You run the script from a Rasberry Pi using a cron schedule every 30 minutes. The instructions are all in the github.
    Scott in Fife, 2.9kwp pv SSW facing, 2.7kw Fronius inverter installed Jan 2012 - 14.3kwh Seplos Mason battery storage with Lux ac controller - Renault Zoe 40kwh, Corsa-e 50kwh, Zappi EV charger and Octopus Go
  • EVandPV
    EVandPV Posts: 2,112 Forumite
    Fifth Anniversary 1,000 Posts Name Dropper
    If you post a screenshot of your settings, we can take a look a see if anything's not right.
    Scott in Fife, 2.9kwp pv SSW facing, 2.7kw Fronius inverter installed Jan 2012 - 14.3kwh Seplos Mason battery storage with Lux ac controller - Renault Zoe 40kwh, Corsa-e 50kwh, Zappi EV charger and Octopus Go
  • EVandPV
    EVandPV Posts: 2,112 Forumite
    Fifth Anniversary 1,000 Posts Name Dropper
    Starfrog said:
    This is the PV showing output ! Right now in the dark !! 
    That's definitely not right !
    I'm wondering if the installer has put a ct clamp in the wrong place. I'd get him back, asap.
    Scott in Fife, 2.9kwp pv SSW facing, 2.7kw Fronius inverter installed Jan 2012 - 14.3kwh Seplos Mason battery storage with Lux ac controller - Renault Zoe 40kwh, Corsa-e 50kwh, Zappi EV charger and Octopus Go
  • Solarchaser
    Solarchaser Posts: 1,758 Forumite
    Sixth Anniversary 1,000 Posts Name Dropper
    Yeah I'd agree with Scott, CT clamp looks to be in the wrong place
    West central Scotland
    4kw sse since 2014 and 6.6kw wsw / ene split since 2019
    24kwh leaf, 75Kwh Tesla and Lux 3600 with 60Kwh storage
  • Starfrog
    Starfrog Posts: 228 Forumite
    Third Anniversary 100 Posts Name Dropper
    Where should it be ? You can see the draw from the grid is minus the amount that the PV is showing it’s producing which ultimately will put all my figures and data wrong even if it is a few hundred watt over time. I’ll post the maintenance screen later 
    ——-
    12 x JASolar 455w Panels (5.46kWp south facing array) Enphase Microinverters IQ7+, Lux AC ESS 3.6kW, 5 x 2.4kwh = 12kWh Plyontech US2000C Battery storage, Lochinver far North, west coast of Scotland 
  • Solarchaser
    Solarchaser Posts: 1,758 Forumite
    Sixth Anniversary 1,000 Posts Name Dropper
    It should be on the positive lead of the incoming power from the solar inverter.

    CT clamps are not 100% accurate anyway.
    A good rule of thumb is to assume they are 10% out.
    West central Scotland
    4kw sse since 2014 and 6.6kw wsw / ene split since 2019
    24kwh leaf, 75Kwh Tesla and Lux 3600 with 60Kwh storage
  • Starfrog
    Starfrog Posts: 228 Forumite
    Third Anniversary 100 Posts Name Dropper
    in you dig it says 17kw of storage ? Battery ? 
    ——-
    12 x JASolar 455w Panels (5.46kWp south facing array) Enphase Microinverters IQ7+, Lux AC ESS 3.6kW, 5 x 2.4kwh = 12kWh Plyontech US2000C Battery storage, Lochinver far North, west coast of Scotland 
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