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Growatt ML33RTA batteries - behaviour and performance

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  • cool_techie
    cool_techie Posts: 100 Forumite
    Part of the Furniture 10 Posts Name Dropper Combo Breaker
    Solarchaser said:
    On a brighter note, if you can hold off until April time you will generally start to see the panels produce more like what you would expect, we are just coming out of winter, and solar is always much poorer then.
    Thanks Solarchaser for your comments.

    You are right about holding off till April. Impatience is getting the better of me. New system set-up, itch to tinker et all! Prudence dictates that, holding off till Summer would give a better indication of Generation output as well as the Battery capacity and usage. Will hold off my itch till then!

    Thanks, CT
    12.71kW PV system - 33 panels of JA solar JAM60S20-385/MR facing S-E(18) / N-W (15) with Growatt SPH-6000 and Growatt MIN 6000TL-X inverters, 4 ML33RTA 3.3kWh batteries, Shinephone monitor app and Solar iBoost+. All in the historic, grand old city of Milton Keynes.

    3.84kW PV system - 16 panels of Sharp ND-R240A2 facing SE with SMA 4000TL inverter, Geo II monitor and Solar iBoost. All in the historic, grand old city of Milton Keynes.
  • QrizB
    QrizB Posts: 18,209 Forumite
    10,000 Posts Fourth Anniversary Photogenic Name Dropper
    cool_techie said:
    Solarchaser said:
    On a brighter note, if you can hold off until April time you will generally start to see the panels produce more like what you would expect, we are just coming out of winter, and solar is always much poorer then.
    Thanks Solarchaser for your comments.

    You are right about holding off till April. Impatience is getting the better of me. New system set-up, itch to tinker et all! Prudence dictates that, holding off till Summer would give a better indication of Generation output as well as the Battery capacity and usage. Will hold off my itch till then!

    Thanks, CT

    Hi CT, apologies for bumping your thread but it's April now and most of us have been seeing good outputs over the past few days. How's your system performing?
    N. Hampshire, he/him. Octopus Intelligent Go elec & Tracker gas / Vodafone BB / iD mobile. Ripple Kirk Hill member.
    2.72kWp PV facing SSW installed Jan 2012. 11 x 247w panels, 3.6kw inverter. 34 MWh generated, long-term average 2.6 Os.
    Not exactly back from my break, but dipping in and out of the forum.
    Ofgem cap table, Ofgem cap explainer. Economy 7 cap explainer. Gas vs E7 vs peak elec heating costs, Best kettle!
  • cool_techie
    cool_techie Posts: 100 Forumite
    Part of the Furniture 10 Posts Name Dropper Combo Breaker
    edited 21 April 2021 at 8:19PM
    QrizB said:
    cool_techie said:
    Solarchaser said:
    On a brighter note, if you can hold off until April time you will generally start to see the panels produce more like what you would expect, we are just coming out of winter, and solar is always much poorer then.
    Thanks Solarchaser for your comments.

    You are right about holding off till April. Impatience is getting the better of me. New system set-up, itch to tinker et all! Prudence dictates that, holding off till Summer would give a better indication of Generation output as well as the Battery capacity and usage. Will hold off my itch till then!

    Thanks, CT

    Hi CT, apologies for bumping your thread but it's April now and most of us have been seeing good outputs over the past few days. How's your system performing?
    Hi QrizB,

    The system is performing well now.

    After complaining about the low generation, Deege sent across its installers to check the wiring and found that one of the two strings on the garage was not wired properly. This was sorted.

    They have also added 3 TIGO inverters to the panels on my house roof (1 in the front and 2 at the back). 

    With all these changes, I am now seeing vastly improved performance from the system. Today's generation has been 48kWh.

    The battery is also 100% charged by around 11AM.

    The flaky monitoring app issues continue though. Guess that would be for Growatt to resolve OR for me to get a Raspberry PI system built to record data.

    But all in all, I am much satisfied with the performance, than in Jan-Feb. Post August would be the real test, of the TIGO inverters, when shading starts playing a major role.

    Thanks, CT
    12.71kW PV system - 33 panels of JA solar JAM60S20-385/MR facing S-E(18) / N-W (15) with Growatt SPH-6000 and Growatt MIN 6000TL-X inverters, 4 ML33RTA 3.3kWh batteries, Shinephone monitor app and Solar iBoost+. All in the historic, grand old city of Milton Keynes.

    3.84kW PV system - 16 panels of Sharp ND-R240A2 facing SE with SMA 4000TL inverter, Geo II monitor and Solar iBoost. All in the historic, grand old city of Milton Keynes.
  • Solarchaser
    Solarchaser Posts: 1,758 Forumite
    Sixth Anniversary 1,000 Posts Name Dropper
    Great to hear you are happier with your generation 👍
    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
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