diy solar

diy solar

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  • Post in thread: Shunt snapped and caused a fire🔥

    Yeah, thankfully it's just some money and time and a lot of stress. But wife is fine, cats are safe garage plater just needs a little bit of touching up and paint. Hopefully it helps someone.
  • Post in thread: Shunt snapped and caused a fire🔥

    I just got power restored hoping my Home assistant caught the cell voltages and current flow at the time, wil add if I can get.
  • Post in thread: Shunt snapped and caused a fire🔥

    Those cables leading to the pack never went under that shelf bracket and they had enough slack on them that if the shelf/bracket broke and it dropped they still would not have been out of length and pulling on the breaker. The breakers were for Positive and Negative. If the weight of the pack...
  • Post in thread: Shunt snapped and caused a fire🔥

    These are the breakers on the Battery/Busbar/Inverters https://www.geya.net/product/gycm3-dc-molded-case-circuit-breaker/ 3P 250A, Negative and Positve they were between the bus bar and the battery pack. None of the breakers actually tripped, they were turned off after the everything was...
  • Post in thread: Shunt snapped and caused a fire🔥

    I've never had any nuisance trips on the DC side of the system. My grid breaker to my Inverters would sometimes trip from overload due to being set to charge batteries but as they are also supplying load but lack any intelligence to scale back charge current sometimes there was too much draw...
  • Post in thread: Shunt snapped and caused a fire🔥

    I explained just above but the breakers were actually turned off after everything happend, how ever I believe all the BMS had cut off anyway, possibly damaged by the fire fighters, over current spike, heat. All the stats I can see in home assistant show nominal Cell voltages in charge state...
  • Post in thread: Shunt snapped and caused a fire🔥

    I think the fusing of the cable happend during the event and it was only the positive lead that fused on it. Even if they fused together the BMS was directly after the battery and before those cable so it would have cut out in the event. I've begun pulling it all apart thoughm probably going...
  • Post in thread: Shunt snapped and caused a fire🔥

    2P DC breakers were upto 200A, for 250A you had to size up to 3P. Packs maybe saw 70~80A briefly if the sun was really good, but most times they would run around 20-50A as the normal. Cables were 95mm so felt no heat at that load.
  • Post in thread: Shunt snapped and caused a fire🔥

    Got a call Sunday from the wife about smoke coming from the garage and fire trucks were already on the way. After they had there fun spraying many cans all over the garage I got to have a look inside. I have 5 rows of shelves with 2 shelves for in each with a battery and then busbar along the...
  • Post in thread: buying panels in bulk

    My MPP inverters and charge controllers just cleared customs and should be delivered Monday hopefully. Ordered all my conduit and switchboards to start putting it all together. I tried to order cables online as well, I'm sure there a lot cheaper but no one wants to talk to you or the they won't...
  • Post in thread: Shunt snapped and caused a fire🔥

    I bought a different model, but it was this model/design
  • Post in thread: Shunt snapped and caused a fire🔥

    I will note, Pack 6 the bottom one had a completly destroyed BMS, I haven't got a really close look at it appears the front 2 cells Vented/Burned. Pack 10 Above it, the BMS is still atached and outwardly doesn't look damaged how ever that pack looks to have lost the front 4 Cells at least...
  • Post in thread: buying panels in bulk

    My bifacials are currently on a boat heading to Australia, cost about 150USD for 550W panels. What equipment are you having trouble getting @MaximusAnonus ? I need to make a post in show and tell, Just reeceived all my breakeres the other day some how fedex got them to me without import or...
  • Post in thread: Backup down under

    This is the filter, can clearly see through it and it really doesn't look that blocked. Because it's sucking heat in from the top I guess it might be pulling heat from the SCC next to it...could also be a fan issue I heard it spinning up and down the other day and there is no control or...
  • Post in thread: Crypto mining oddity down under

    Constantly running, rapid temperature change could have happened though it can change at the drop of a hat here along with humidity. I've taken to closing the window when humidity is getting high and letting temperature rise as it's blowing the heat back, seem to stop the humidity from forming...
  • Post in thread: DIY 'Chargenectifier'

    I'm currently waiting on the tax man, filled on July 18 and it's been sitting on under review since, solar production has finally ramped up though so maybe I'll buy them soon if the power bill goes down fast enough. Will update when I can, my only concern with them is heat buildup, I plan on...
  • Post in thread: buying panels in bulk

    Did you pay using Alibaba or out of Alibaba?
  • Post in thread: Backup down under

    Have you played around with the solar forecasting in Home Assistant?
  • Post in thread: Backup down under

    If you tried to make noise about voltage in the day time you would have to get pretty lucky to have someone listen to rather than just sweep under the PV rug. Definitely helps that someone else was on the ball with you.
  • Post in thread: Backup down under

    Pretty sure one of the big things is if it's decided temperature is acceptable and kills the fan it rises quickly and vice versa of it decided it's hot and cranks fan up temperature drops up untill it decides it's good to slow down or turn off again. Will definitely require monitoring. Looks...
  • Post in thread: DIY 'Chargenectifier'

    Is everyone putting DC breakers on the output of these?
  • Post in thread: Material between compressed cells

    Amy from Luyuan will sell you insulation material that they are using and I'm pretty sure Docan has something similar as well.
  • Post in thread: Shunt snapped and caused a fire🔥

    It's really hard to determine because the fire fighters sprayed and hosed it deforming a lot of the plastics and wood. But the shunt was on the negative, going to a breaker, it had no strain on it so the battery dropping wouldn't made the shunt snapped like that. I think it was poor design on...
  • Post in thread: Backup down under

    Interesting my inerters were in SBU mode but just bypassing to grid, for some reason the head unit has changed and my output voltage is now set to 220V. When I switch all the grid feedins off that it went to battery mode, but the LED is blue instead of white.
  • Post in thread: Shunt snapped and caused a fire🔥

    Shunt and Monitor was one of these. https://a.aliexpress.com/_m0YM7ro I got the 300a shunts, highest current was only 60a
  • Post in thread: Backup down under

    Hmm, I was just going through my settings and realised 13 - Setting voltage point back to battery when selecting "SBU" (SBU priority) in program 01 had also changed it's setting to FUL instrad of the 51V I had it set too, which was why it wouldn't operating in battery mode because it was set to...
  • Post in thread: Backup down under

    How is your off-grid inverters temperature on hot days? One of my units is getting really hot, might take off the wire cover and see if that increases air flow. This unit also has my combined strings from the roof so it sits at the current limit for one of the MPPTs for some of the day. Need...
  • Post in thread: Backup down under

    I have Shunt/Monitor under each inverter and then on each battery at my Busbar and some of the BMS have a screen that shows voltage. Want to try and integrate all the shunts into Home Assistant.
  • Post in thread: Backup down under

    I have plenty of room in my switchboard. If I just moved my GTI solar to my MPP I could run my MPP in SBU or SUB mode rather than USB. Many ways I can sort my problem, but one of those problems I should have factored in before it happened. I should have moved my GTI breakers around when I was...
  • Post in thread: Backup down under

    Maybe I missed it but your electian didn't put any SPD in when you got your boards installed?
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