diy solar

diy solar

Recent content by CMDRZOD

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    MPPT Battery Charging - AC component during high PV loads

    Im contacting Eaton now about that. It seems there are 2 versions, the R and T. T integrates a temperature sensor, it seems I purchased the R model, which also has these leads. I tried to meter these connections but did not have any success in determining their exact purpose.
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    MPPT Battery Charging - AC component during high PV loads

    Yes. I was originally going to bolt the cap to the 3/4 plywood behind it vertically with the terminals mounted upwards but it seemed to be a hazard in case anything fell down to the cap terminals. Instead I decided this small shelf would be the best way of mounting. I am very aware of the...
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    MPPT Battery Charging - AC component during high PV loads

    Got the capacitor installed. Was hesitant to charge it, finally settled on using a battery charger. Worked a treat and in 20 minutes the capacitor was charged and ready. This is a new install. Still have some cleanup and finalization to do. AC amp reading taken ahead of capacitor. AC Amp...
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    MPPT Battery Charging - AC component during high PV loads

    Incredible MattFin. Might be going dump diving this summer I suppose. I have many large ballasts for outdoor lights here, I wonder if those cores would work. Theyre not the oil filled type so the transformer is easy to get at. Thank you for your thoughts on this.
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    MPPT Battery Charging - AC component during high PV loads

    So remove current from the graph? This graph is only showing battery data. This data is not for the output side, besides seeing the battery current drop as loads start.
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    MPPT Battery Charging - AC component during high PV loads

    Graph from this morning. Temperature didnt start to rise until the loads started, you can see where the first two ramp up through the current bar.
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    MPPT Battery Charging - AC component during high PV loads

    The cap comes with a temperature sensor output, just unsure of the exact type. I will be connecting this sensor to my automation once I have that figured out. My concern is the charge has nearly completed, but temperature has barely risen until my loads of opportunity ramp. The high load...
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    MPPT Battery Charging - AC component during high PV loads

    Here you go. This is yesterday. Left axis Amps,volts Right axis SOC, Temperature
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    MPPT Battery Charging - AC component during high PV loads

    I appreciate someone with intimate knowledge of my system chiming in. Still wondering about battery heating associated with that high current I see. Since the capacitor will arrive shortly I will update my findings. If the capacitor reduces battery heating by a few degrees I will call it a win.
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    MPPT Battery Charging - AC component during high PV loads

    Thats interesting Vigo, do you mean you were shocked when touching both 48v battery leads, or just the metal battery cases? The only reason I decided to look into this is my fluke meter has a magnet and it vibrates like mad when near the battery leads, when there is seemingly just a small DC...
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    MPPT Battery Charging - AC component during high PV loads

    That's one thing I should've mentioned. I've got a JLN fuse holder with parallel 4/0 crimped and terminated on both sides of the holder. I can feel warmth near the crimped ends.
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    MPPT Battery Charging - AC component during high PV loads

    In any case I have no issue spending $1500 to help protect $35k of batteries. I need these to last many years to come and thats a small price to pay for their longevity. I'd really like some more information on this topic to make a more informed decision. Unfortunately I've never seen this...
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    MPPT Battery Charging - AC component during high PV loads

    https://sparks.gogo.co.nz/capacitor-formulae.html Went to: I want to draw x amps for t seconds Punched in: 270A .0083sec (120hz) 54v 48v According to that the capacitor size required is miniscule. So if that 130 Farad bank means the batteries never see this ripple I will be happy and sleep a...
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    MPPT Battery Charging - AC component during high PV loads

    Yes this is measured on the battery leads. As far as cycling, I'd prefer the capacitor takes this current as opposed to the batteries. Capacitor 1 million cycles Battery: 10000 cycles Yes I agree, I've never seen this talked about. I did not plan for it in my initial installation. I used...
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    MPPT Battery Charging - AC component during high PV loads

    Hi there. I'm looking at an eaton 130 farad capacitor, rated for 62V part no XLM-62R1137A-R. The heating doesn't appear to be much, the highest reported temperature I've seen from the BMS is 34C which I don't believe is terrible, but not ideal. My goal is to keep battery temperature below 30C...
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