Recent content by silverse2m6

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    MPP Solar Q&As

    Hello fellow PiP-ers, Merry Christmas and Happy New Year to you ! I'm in the process of building my second 7S100P pack and everyone who's done so, knows the time it takes to charge/test and assemble 700 cells. But the Holidays have provided me with some extra time to do some coding and I'd like...
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    Low voltage cut off and high voltage cut off

    I do have a similar strategy. Please be advised that such a cycle only uses about 75% of the packs total capacity but prolongs longevity and minimizes (not eliminate!) risks of over/under charging the packs.
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    Nissan leaf battery pack

    I have an extra 110V LEAF charger I could sell to you. You'd have to find a way to convert your Solar power to 110V alternative...
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    One charge controller, or two? For opposite facing panels.

    4 PiPs on one battery pack. Since they work in pairs of two in parallel, I sometime have one pair charging the battery while the other one is discharging.
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    Small offgrid system - need oppinions and suggestions

    Hello, welcome on the forum. It is important you start with being clear to yourself what your true needs are. This exercise in turn will generate what scenarios are available to you (based on cost, time available, urgency....). The technical details come later.
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    South Carolina Powerwall

    + the challenge to making it all work. If I have to explain, you won't get it... btw, transformer not needed as long as grid power is present.
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    One charge controller, or two? For opposite facing panels.

    On things like these, I "buy once, cry once". Even with cheaper equipment you will likely only get a portion of what a good charger would deliver (look at efficiencies and idle consumptions)
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    One charge controller, or two? For opposite facing panels.

    Sorry mate, if you want to use the most out of your panels, the way your setup is laid, only 2 MPPT SCs can achieve this.
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    South Carolina Powerwall

    Quick little (bragging [emoji12]) update with video: 5.5 kW produced at noon (out of 24 x 315W panels)http://cloud.tapatalk.com/s/59ad79d5993f8/20170904_120013.mp4
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    need some assistance with a nissan leaf power wall build

    2. Back to grid is the voltage that when reached, the PIP stops using the battery, goes to line mode and starts charging the batteries using grid power. Back to battery is the voltage that when reached (and conditions are right) will stop using line mode and start using the batteries instead...
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    MPP Solar Q&As

    1 week update: using about 50% less power from grid, having 2 PiPs on one main, the other 2 on the second. House gets on batteries and solar around 09:30 and gets back on grid around 20:00 ! my PW is 6.3kW at the moment 7S140P
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    MPP Solar Q&As

    I did try this setup for one week. In NA you get 208V between phase L1 and L2 and 120V between Lx and N. I got almost no voltage between L1 and L3 or L2 and L3. The issue I quickly ran into is w/o a real 3P input it would derate to 80V for 10 seconds every 5 minutes. Although I did not see any...
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    MPP Solar Q&As

    The real trick is to keep the 2 mains apart @ 180'. They already do 120' for 3 phase output and 0' for normal output. If they would also do 180' they'd be golden. With MOFSETs and transformerless designs like the PIPs, it's just software I'm pretty sure...
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    MPP Solar Q&As

    Daniel, yes it was known they would drift. The unexpected part is they won't drift as long as they have the grid reference, even when only operating on battery mode.
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