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Pink7

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    Growatt SPF5000ES Offgrid 9kw DIY Solar Project

    in Alternative/Renewable Energy Forum

    Posted · Edited by Pink7

    Now i understand why active balancing only at the end of the charge is discussed. I had set my JK BMS to start balance from dc 3.45v as in this video but ended up with deviation of dc 0.2xx v who took much time to get balanced back and I feel it messed up the charge process and I also guess its ineffective. Now i have change my settings and try balance from  dc 3.3v tomorrow. Lets hope thats a better and smoother way of charge.

     

     

     

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    Growatt SPF5000ES Offgrid 9kw DIY Solar Project

    in Alternative/Renewable Energy Forum

    Posted

    So i was sure to wake up early today to get some charge before grid was taken down ( will be down whole day) So i started up charge from solar as soon there was some sign of daylights but that was very optimistic from a solar beginner. I had to wait an hour or some before see and sign on charge from the solar.

     

    Now grid is down and i have got up my wifi monitoring on the master inverter. I have not figured out yet if it show data from master only or master and slave inverter together.

     

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    Growatt SPF5000ES Offgrid 9kw DIY Solar Project

    in Alternative/Renewable Energy Forum

    Posted

    3 hours ago, TimeMachine said:

    Not yet. Got many years of nervous wait to see if equipment fails over the payback period. Real free is when you just tie into your streets overhanging wires. Had a chance to buy a condo that had balcony with street wires within hands length. Could easily wire a coil around the main Street line to get free power. But the idea of staring at cables didn't suit me. Also brings the topic of how ugly street views are if rooftops with square black tiles in view. Does that bother anyone. Did , me at first, but then just seems to be part of a normal roof nowadays.

     

    I was seduced many times when planing and buying with some cheaper options but I tried to choose good value (Good quality at good price) With the hope that It will last for many years but time will show. I tried to plan the setup to have some extra margins for the capacity on for example inverter. But time will show.. I spent more or less exact 300k for all. Electric bill lately been around B 4k (+/- 500) so maybe 6-7 years needed for ROI.

     

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    Growatt SPF5000ES Offgrid 9kw DIY Solar Project

    in Alternative/Renewable Energy Forum

    Posted

    Im setting up a routine for startup and closing down the whole setup. If any have some corrections or improvements pls let me know:

     

    START UP

    1 Check BMS Its Turned ON - Precharge 10 sec - Open Battery Breakers

    2 Open breakers For Solar

    3 Open Inverter ONE - Open Inverter TWO


    CLOSE DOWN

    1 Close Inverter TWO - Close Inverter ONE

    2 Close Breakers For Solar

    3 Close Battery Breakers

     

     

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    DIY 28kw/h Storage : EVE LF280k x 32 LiFePO4 Batteries

    in Alternative/Renewable Energy Forum

    Posted · Edited by Pink7

    On 9/23/2023 at 4:32 PM, MJCM said:

     

    In my home country, people sometimes have to pay to feed-in (YES you read that correctly), because there they use fluctuating energy prices and sometimes it's even negative.

     

    Same here,  its a Europe phenomena. Imagine the days they get payed to use energy. The more you use the more you got payed. Its not very environment friendly.

     

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