diy solar

diy solar

Recent content by Csimmer

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    CATL 271Ah cell issues.

    What about my eve cell order, I have heard nothing
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    CATL 271Ah cell issues.

    Where's my money Michael?
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    Question about MPP Solar and Float Voltage - not necessarily MPP Solar specific

    I agree with most of what you said. I have changed my setup since. I found an industrial contactor which I control with the relay in my Victron BMV700. The BMV700 relay can be triggered by battery voltage or STATE OF CHARGE (how cool is that?) it even has hysteresis settings. So I just set my...
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    Dual Inverters for low and high wattage

    Another solution is to use a current sensor to turn in the second inverter. Reduce the standby losses and still have ample power when you need it.
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    LiFePO4 Voltage Chart?

    Because of the the flatter voltage curve for LIFePO4 the MPP Solars will go to absorb and float too early on the lithium settings, maybe on 12v they're ok but the 48v are not. For example the low voltage disconnect setting for Lifpo4 is so close to the normal operating battery voltage that the...
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    LiFePO4 Voltage Chart?

    That's how they should work but my MPP solar doesn't seem to work that way. When I reduce the bulk voltage the charge rate also reduces.
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    MPP Solar + BMS communication/control

    I used one I scavenged out of a old lift motor power supply.
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    LiFePO4 Voltage Chart?

    My BMV is set at 98% which seems pretty good so far. The firmware fixes I mentioned are third party and I found them here https://forums.aeva.asn.au/viewtopic.php?f=64&t=4332
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    Lifepo4 SOC based charging

    If you have a look at the spreadsheet you'll see my presumed SOC is fairly consistent over 2 months so far, I am recording these readings in view to fine tune the BMV settings if they start to deviate.
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    LiFePO4 Voltage Chart?

    I might be wrong but if I set the capacity lower, I think the BMV will still drift as it has no reference. A SOC reset by voltage is problematic as well because charging and discharging affect the voltage at any given SOC. Is it a MPP solar inverter because I had the early float issue as...
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    Lifepo4 SOC based charging

    Hi, I am using the SOC relay in a Victron BMV 700 to control a contactor which switches the pv panels to my chargers. This way I can charge my batteries with a higher voltage setting and have it stop at say 80% SOC to increase my battery lifespan. This works very well. The only issue is that I...
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    LiFePO4 Voltage Chart?

    Hi, I am using the SOC relay in a Victron BMV 700 to control a contactor which switches the pv panels to my chargers. This way I can charge my batteries with a high voltage and have it stop at say 80% SOC to increase my battery lifespan. This works very well. The only issue is that I need to be...
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    Understanding MPP Solar charge settings for LifePO4 batteries

    Great info in those graphs
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    Understanding MPP Solar charge settings for LifePO4 batteries

    I haven't used the new firmware yet because I used alternative solutions to the MPP shortcomings. If I had know before I implemented my solutions I would definitely have had a fo at the new firmware.
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    Understanding MPP Solar charge settings for LifePO4 batteries

    https://forums.aeva.asn.au/viewtopic.php?f=64&t=4332
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