Solar -Lithium Question

RCB
RCB Member Posts: 249
in Battery/Electrical & Solar
Lithium batteries seem to have the longest life when charged to 80-90% and occasionally charged to 100%. With an active solar panel system the battery would be charged to 100% when the trailer is stored and kept at 100%. If one had an additional switch to disconnect the solar charging when stored would there be any negative affect on the solar panels ?
400 - 2019
St Catharines, ON
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  • AnOldUR
    AnOldUR Member Posts: 1,728
    edited September 2022
    @RCB you can turn off charging within the Victron app.
    Switch the "Charger enabled" to off.


    Stockton, New Jersey
    2020 nuCamp T@B 320S * Jeep Wrangler
    60,865 camping miles through the end of 2025

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  • Horigan
    Horigan Member Posts: 864
    No negative effect on the panels when switched off.
    Rich
    2019 T@b 400
    2025 Toyota Highlander 2.4L Turbo
    Bellingham WA
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  • Denny16
    Denny16 Member Posts: 5,431
    edited September 2022
    You should also be able to change the charge setting to just charge the lithium battery/batteries to 80-90%.
    Cheers
    2018 TaB400 Custom Boondock,  Jeep Gladiator truck, Northern California Coast.
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  • elbolillo
    elbolillo Member Posts: 555
    RCB said:
    Lithium batteries seem to have the longest life when charged to 80-90% and occasionally charged to 100%. With an active solar panel system the battery would be charged to 100% when the trailer is stored and kept at 100%. If one had an additional switch to disconnect the solar charging when stored would there be any negative affect on the solar panels ?
    This may be true of Lithium Ion batteries, but it doesn’t seem to be the case with Lithium Iron Phosphate batteries.

    if you are worried about continual charging just turn the solar charger off once you have reached 100% charge. 
    _____________________________________________________
    Ken / 2023 Tab 400 “La Bolita” (31,000+ miles) / 2024 Toyota Sequoia
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  • tphaggerty
    tphaggerty Member Posts: 78
    What @elbolilo says. LiFePo batteries want to be charged to 100% in normal use (one of the reasons the new low end Tesla Model 3 is using them). They should be partially discharged for long term storage. Let ‘em charge and then use them all the way down to shutoff (if needed), they’ll work just fine. All standard “RV” batteries are LiFePo, they are much safer than other chemistries.
    2019 Honda Ridgeline RTL TV
    2018 T@B 400, 300Ah Renogy LiFePo batteries, 350W Renogy rooftop solar
    Poughquag, NY
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  • Dutch061
    Dutch061 Member Posts: 765
    edited September 2022
    As per Battleborn, SOC should be 50% or more and then remove any charge or discharge. I turn off the solar charging and the Perko. Done!

    Being charged to 100% is not an issue, as long as the "float voltage" is 13.4 to 13.6. Progressive Dynamics converters are programmed that exact way. The MPPT Solar Charge Controller can eb set to mirror this.

    Brad
    2020 400 BDL aka "Boonie"
    2022 Black Series HQ19 aka "Cricket"
    2021 F-250 Tremor with PSD aka "Big Blue"
    Concord, NC 
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