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    LiFePO4 Capacity - Voltage chart when under load/charge/nil

    With my battery pack... 16S - 8xCATL 310's & 8x280 EVE's Take the full voltage & /16 to get the cell voltages that I use for the calculations.
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    LiFePO4 Capacity - Voltage chart when under load/charge/nil

    Working on the data & making some progress... Getting some good results & predictability within the flat part of the curve. This is really just saving me from buying a wifi shunt & having to pull data out of it. So far the logic is... Use static values start/end curve: 3.45v = 95% 3.4v = 90%...
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    LiFePO4 Capacity - Voltage chart when under load/charge/nil

    yeah 100%. This chart has been floating about & is quite popular - https://diysolarforum.com/threads/lifepo4-24v-voltage-chart.22388/ I wanted to get something that was closer to realistic conditions. Its not an exact answer - but an answer based on a lot more data & sound research work.
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    LiFePO4 Capacity - Voltage chart when under load/charge/nil

    I understand the downside of estimating capacity by voltage etc... There's a few voltage charts around however you get different results depending if the battery is being charged/discharged. If the battery is resting at 50% & you apply a load - the voltage instantly drops, however the capacity...
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    Aus Syd - Selling (complete) 24v Setup - (no batteries), <6mo old

    Upgraded my configuration to 48v, so need to ditch all my 24v stuff. Prices are what they cost to purchase new for a reference. 1 x SCC - Victron SmartSolar 100/50 MPPT Solar Charge Controller ($380 AU) 1 x OverKill 8s BMS 100A (Genuine overkill unit) ($148 AU) 1 x JBD 8s BMS 100A (same as...
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    Recommended vendors for GTIL inverters?

    +1 on above - they're for Solar Panels not batteries. HOWEVER... the alternative is to use Grid tie micro inverters, you can use batteries as inputs on those & they're also readily available & compliant with local standards. Down side is that they're typically only 300W or so. You can also use...
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    Recommended vendors for GTIL inverters?

    Australia - they shipped from China which is out closest. Unsure if some European hubs would be better - but great store none the less
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    Australia - Group buy - DEYE 5kw hybrid (Aus approved)

    Correct - it can do that. There's 3 modes: Selling first: Power loads & charge battery, then anything else exports to the Grid (configurable max feed in power). Load power priority is Solar, grid, battery. Zero export to load: only power backup load, dont power house or feed into the grid (uses...
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    Adding a battery to a SUN 1000W GTIL

    I thought it was the other way around? Solark was the original company & Deye used their IP & just started to sell them
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    Australia - Group buy - DEYE 5kw hybrid (Aus approved)

    I purchased 2 of the 5kw units & it was around the $1800-2k each mark. The 3.6kw units were a hundred or so cheaper from Deye direct - but i'll ping you the details of the AU person that can import them - it will be cheaper than what i paid direct from Deye as he imports other stuff from them.
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    Adding a battery to a SUN 1000W GTIL

    100% agree with you, my peak usage is 2-3,000W per phase - so those units would cover it. I have mine paired with a Victron charge controller & everything works well. They are unbeatable value for money & solid performance. There is a 24v unit that appears to be new (230v though) the...
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    Australia - Group buy - DEYE 5kw hybrid (Aus approved)

    Pretty sure it was right on $2k landed. I'll PM you his details, he designs Solar powered heat pumps & works with Deye to manufacture them.
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    Adding a battery to a SUN 1000W GTIL

    Sorry - yes Solark, which I think is the original - Deye is a copy of those. Dont compare the GTILs to the Deye/Solarks - they are very, very different units - with immensely different capabilities. The GTILs are a superb little unit & a pair of 2,000W units would do 85% of what i need. But...
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    Adding a battery to a SUN 1000W GTIL

    Yes, the Deye units have really solid functionality/features. yes they're 230v - i'm based in Australia, for US there's a different brand Solar Ark(?) i think.
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    Australia - Group buy - DEYE 5kw hybrid (Aus approved)

    I went with 2 of the SUN-5K-SG03LP1-EU, the other strong option was to go with the smaller SUN-3.6K-SG03LP1-EU. The 5k wasnt too much more & would have capacity to use more appliances and feed in more to cancel out my peak usage. It does require a lot more cable though! Everything is 35A...
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    Australia - Group buy - DEYE 5kw hybrid (Aus approved)

    I managed to get 2 from Deye directly, you only paid just slightly more than me. It appears Deye are not setup to do small numbers, compared to other things communication was very infrequent - fair enough though. I got told the same story - 3 week delay, but then managed to get 2 landed in <2...
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    Recommended vendors for GTIL inverters?

    I used "GAIADEFENDER store" - super fast shipping & they've been perfect for months. What country are you in? I'll be getting rid of my 2x1000W 24v units very soon.
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    Adding a battery to a SUN 1000W GTIL

    no - i've got 2 x 5kw Deye units coming today, so swapping over to big time power.
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    Adding a battery to a SUN 1000W GTIL

    not possible - as there's only 1 input to the units, its on or off. In the diagram in post 1 the battery & solar is connected together, the inverter doesnt know if its battery power or solar power its seeing. I tried it yesterday, was getting ~1000W from the panel & had a full battery, so set...
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    Adding a battery to a SUN 1000W GTIL

    I have exactly what your "intention" is & have been using it for months. It works exactly how you think it would - it gets power from either the battery or battery + charge controller. I commonly see both batt & SCC providing power in the mornings. I have 4 x 390w panels, 2S+2P, so 80v and use...
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    Australia - Group buy - DEYE 5kw hybrid (Aus approved)

    I'm ordering a pair of 5kw Hybrid inverters from DEYE - price is good & they're making some units. These have CEC approval - https://www.cleanenergycouncil.org.au/industry/products/inverters/approved-inverters They're rated for 5kw, but also do 5kw on battery (most other hybrids are de-rated to...
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    Deye Inverter AS/NZS 4777 Compliance

    Ahhh NZ! gotcha - thanks! :) Well i'll thankyou after i get my units here in Aus
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    Deye Inverter AS/NZS 4777 Compliance

    Who was the importer? I'm currently trying to get a pair of 5kw units, speaking with Deye over Alibaba they said the single phase units are OK - but the 3 phase units are still in progress
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    Clamping Pressure

    Depends on your spring... How about you grab a kitchen scale, put the scale on a piece of wood & put the spring on the scale. Then use a clamp to slowly compress the spring & read the scale at each length of compression. Or just push on it... You have a 40mm spring, get 3 pieces of wood -...
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    16S Battery use a 13S Li ion charger to get 3.4v/cell?

    At times (cloudy day) I need to charge my batteries from the wall - to supplement the solar. (well use my other solar array) I currently use a 8S hobby charger, but changing to 48V so need a 16S charger. Also going "cheap" as its only used occasionally - but most cheap ones are 3.65v/cell, and...
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    3D Printed Battery Caps for LiFePO4 cells

    Cheap, quick & easy - they just sit on top of the terminals to help protect against shorts. Have been sized for 280/300AH cells & i put my balance cables in the middle of the bar with a M3x10mm bolt Up on thingiverse: https://www.thingiverse.com/thing:4946812
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    3D Printed Case for Heltec 8s Balancer

    Just designed & printed a case for the Heltec 8S capacitative balancer - hope it helps someone! https://www.thingiverse.com/thing:4939112
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    4 x QNBBM Single cell vs 4s QNBBM Balancer

    Does anyone know the differences - is it just packing & expandability? Purchase 4 of these & chain them together: Or a single one of these:
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    BMS that interrupts the +ve lead & not the -ve lead?

    No i havent yet, but space & packaging is at a premium - so the less the better. Very tight packaging requirements etc. if i can save the space & complexity by having a single BMS then i will - its also "unnecessary" adding a whole heap of componentry & connections/failure points for something...
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    BMS that interrupts the +ve lead & not the -ve lead?

    Looking for a BMS that goes on the +ve lead, instead of the usual -ve lead. Are there any? Looking at trying an automotive LFP replacement, -ve is common, with 2 x +ve 1 x +ve = starter motor only, bypasses the BMS 1 x +ve = rest of the car, BMS, balanced, usual
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    BMS for DIY motorcycle starter battery.

    Currently looking at this myself - for cars though (<2L turbo, low compression). A lot of people have done it. The way i'm thinking is you need 2 positive terminals - 1 goes to the starter, 1 goes to the rest of the car. The starter +ve bypasses the BMS (fuse to manage risk) The car +ve has all...
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    Electroplating bus-bar

    Sorry - here's a good link for Zinc: http://www.gmh-torana.com.au/forums/topic/67790-home-zinc-plating/
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    Electroplating bus-bar

    I've done some DIY small scale plating in my time... If its all black - then ease back your current, too much current will make it bubble & go black. There should be minimal bubbling from the surfaces when plating. You also need some water flow if possible - use an aquarium bubbler or pump to...
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    3D Printed case for Overkill 8S 100A BMS

    Files are up & public! Thingiverse: https://www.thingiverse.com/thing:4906537 TinkerCad: https://www.tinkercad.com/things/ieL1h8xwdGP-overkill-8s-100a-bms-case TinkerCad: (component breakdown) https://www.tinkercad.com/things/1807zd3VEK9-overkill-8s-100a-bms-case-parts So you can print straight...
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    BMS vs Charge controller settings

    yep - this is the confirmation i was after. I was using the BMS to control the whole approach to charging, instead of the Charge Controller (lol - i realize how dumb that sounds after writing it!) Will revert the BMS & adjust the controller as required. FYI - Controller: Victron SmartSolar...
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