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    anyone recognize this brand of manifold?

    I suspect 5 years at least ... these came off someones house where they were using it to heat their home, I think it was 1500 sqft if I recall correctly. There are no dates on the unit or branding so far as I can tell ... there are some numbers on the bulbs though, I will look at them today to...
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    Batrium SMA Sunny Island Integration issue?

    I have not resolved the issues :/ I can't use any of the logic on the SI's to trip events right now because of the untrustworthy coms. The coms has dropped in the last month about 4 times causing a complete restart of the systems while I was there, it is at the point I am considering getting...
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    anyone recognize this brand of manifold?

    UPDATE: For those that come across this and wondered what my solution was, I ended up swagging the manifold coper pipe up a bit to allow for a 3/4 brass union to be soldered on.
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    DIY solar hot water controller options?

    shouldn't need to with a properly setup drain back system. You always shut the pump off when the bottom tank temp is only 5 degrees bellow the collector tank and when the top of tank temp is 160F. So the collectors and insulated pipe is typically above tank temp and has time for water to leave...
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    DIY Large insulated water drain back tank?

    forgot to address this as well ... these are not "studs" these are the 11ft C Channel we are using at the top and bottom of our windows which span 88ft in total (24 windows in each floor which are ~79" high each and weigh a good 155 each). These are attached on to our steel columns only on the...
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    DIY Large insulated water drain back tank?

    Never dumb questions, just dumb answers. Lots. The original was going to be a 10k, two story, corrugated steel tank with 1ft of internal insulation which would have bumped the total gallons to 5k I have looked at the all wood tanks and while I think they would "work" I don't already have the...
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    DIY Large insulated water drain back tank?

    16ga ***This is not an original concept*** 12 panels build a tank, each panel attached top/bottom to the adjacent panel. A stack of 4 panels go on top the previous, sheet metal corners with 2 screws per C Channel intersection min, likely might do 4. If I don't go this route I might build it...
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    DIY Large insulated water drain back tank?

    Oh it will be lol ... our original "plan" was a 2 story 10k tank you would use to store rain water but built inside, it has since sized down to this. Tons of people build tanks of this size for indoor koi ponds, we do have in floor drains near this area. The 3/4 internal poly iso, R5? , was...
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    DIY Large insulated water drain back tank?

    I have seen a lot of builds for DIY storage tanks as well as indoor koi ponds that seem to use wood, typically 2x6 on edge 6" OC bolted together and tied together with plywood on either side, and I was thinking of using scrap C Channel I have left over from building. The C Channel is 16ga...
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    DIY solar hot water controller options?

    One of the things I am finding difficult right now is parting everything out ... so I am going to start listing things I am going to use for the above "just get it done without sensors" build for future viewers. I will likely edit this single posting to add parts as I get them / find them Used...
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    DIY solar hot water controller options?

    I am fairly confident in my ability to code this up if I could find the right platform to do it on. My "real work" when I am not building the house involves complex coding so I am good there :D For now I need to get this system up so I can see where the radiant is in the floor so we know where...
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    DIY solar hot water controller options?

    Going to use my original post here on the topic to branch into what I think is my main design less super fancy all in one automation. Feedback welcome! Basic components. Boiler, has a circuit dedicated to "saving" the boiler if the water gets too hot by dumping water into the drain if...
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    DIY solar hot water controller options?

    Has anyone DIY'ed their pump controller and if so what did you use? Inputs I want to monitor, log, and use to turn on / of pumps and or valves. 1) temperature at the top/bottom of the solar water tank, and at the output of the collectors. 2) temperature of water coming into an isolated DHW...
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    anyone recognize this brand of manifold?

    So this thing is either chinese or japanese, I found markings on the 22mm fitting nuts from both countries.
  15. C

    anyone recognize this brand of manifold?

    found my caliper compression fitting male to male connector 1mm pitch 28mm OD 23mm ID copper pipe is 19mm ID ~21.6 OD not sure how to get this to a 3/4 standard yet. I haven't been able to find a compression fitting which goes from M28x1 to 3/4
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    Batrium SMA Sunny Island Integration issue?

    This is what I can adjust. The 20 setting at Current is what I have been changing, at the old place when this was setup as a battery backup system I had the Current set to 112 but it rarely got triggered as we kept above 85% most of the time. This BMS is not "great" for eve cells but it has a...
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    anyone recognize this brand of manifold?

    I believe this was installed in Maine or Vermont, I forget which, and I acquired it second hand from the guy who removed it from the dwelling it was installed on. I am trying to identify the manufacture so I can more easily find components I need to put it back in use. I tried to find a valve to...
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    Batrium SMA Sunny Island Integration issue?

    from that document "AXITEC AXIstorage Li 8S QTY 3 or more for offgrid with splitphase" That is ~22kW of storage. 3 of my 280 batteries is ~32kW of storage.
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    Batrium SMA Sunny Island Integration issue?

    I can adjust it to do whatever amps I want it to. I had it at 112 if under 80%, then 40, then 35, now 20. The BMS isn't cutting off because of the amps though it is because the cell voltage for one or more cells is too high. When it was set to 112 I would have 6 or so cells screaming at the BMS...
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    Batrium SMA Sunny Island Integration issue?

    UPDATE, and new issues: So this system was decommissioned and setup in its new home as a slave unit to another master for my offgrid house build. I haven't had any restart issues I can recall since installing the BMS with the new unit, the master, receiving the signal. BUT ... have some odd...
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    resting SoC in Battery Backup system and battery health

    I ran the SI with DIY LiFePo4 battery and Batrium BMS for about a year ... this system has now been moved to our new home we are building which is offgrid and reconfigured with another SI for split phase. The battery backup was nice BUT I couldn't use the SI built in relays well to auto...
  22. C

    What generator works with SMA sunny island?

    research update: Found a company selling trailers again, SI's installed, and a Duromax / Durostar generator (13000eh) used as the backup power. The seller indicated this is an auto start feature but the duromax has a push button start (hold for 1 second) and a push button stop (hold for 3...
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    What generator works with SMA sunny island?

    Small update: Was looking for YT videos with people who are using the SI's with a generator and found the portable light trailers you can find all over the US with the SI's are using a kubota low boy. Another video a guy from a company demonstrating the autostart features was using a all house...
  24. C

    What generator works with SMA sunny island?

    I will have to observe the SI when it gets passed my 30 sec "warm" period I have programmed in right now. I believe I lowered all times required to test the gen on the SI side as well to make it faster for me to test ... forget which settings those were though. I haven't tried to cut off the...
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    What generator works with SMA sunny island?

    Update, I disconnected the SPD and the phantom voltage disappeared. Looking at the SPD it is a 300VDC not AC SPD by MN solar so that could be cause. Re running all gen experiments now with current generator on site but nothing seems to work yet. Currently getting GnFailLock, no reasons...
  26. C

    What generator works with SMA sunny island?

    Voltage measured at the generator matches the voltage at AC2 inputs, the run is only 4' right now. I have de-rated the amps in the inverter of the generator down to 15 amps, despite the gen being rated at 30 as well for my tests. The way the SI is suppose to work is it sees input on AC2 and...
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    What generator works with SMA sunny island?

    Good tips but I don't think it will resolve my issue where the SMA sees the inverter, knows it is "in range," and tries to sync with it but can't after ten minutes then locks it out throwing an error relating to current feedback over time into the generator. Update on this though. After dark...
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    What generator works with SMA sunny island?

    Did a dive last night into more generator research and other peoples experience with SMA ... it is a mess for sure. I found one US guy with a Kubota GL7000 generator that "worked" only if he turned the governor down on the generator ... but that is a $7k generator so I can't easily test that...
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    What generator works with SMA sunny island?

    So after reading the white paper I realized none of the generators likely fall into the range of something that would work with the SI less it mimicked what a synchronous generator outputs :/ I did try to switch to frequency / current today to see if it would accept the gens I have on site but...
  30. C

    What generator works with SMA sunny island?

    Behavior mentioned previously. I have turned off breakers at main panel and it didn't change. Also turned off, though not fully, the main unit and started, again no change. Haven't placed a load on the voltage source yet.
  31. C

    What generator works with SMA sunny island?

    Update, and an odd one. I am seeing 200VAC on S1's AC2 on occasion with nothing hooked up to it. Also S1 has a asterisk after it which normally means AC2 input is in spec.
  32. C

    What generator works with SMA sunny island?

    Tried another green today, generac by briggs and stratton, wheel house 5500. No dice. Voltage was pretty high but in range, 130 per leg. Bounced between 126 and 130 range. Also tried to configure as grid and grid Gen and neither worked. There is a Honda with digital Avr i can rent and...
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    What generator works with SMA sunny island?

    I have default settings which are pretty wide. The SI should "connect" after two minuets but it doesn't though it shows in spec and in warm up phase. Then ten minutes later or so it fails with a backend error. I looked at the generators manual but couldn't find specs on back feed or AVR
  34. C

    What generator works with SMA sunny island?

    I have a briggs and stratton storm protector 5500 which the SI reads as in spec but gets stuck at "warm" status till it finally errors out many minutes later with a backfeed error, default is 100w and 30sec. Does anyone have a list of approved generators for the SI? The SI is configured as...
  35. C

    Two MN200 classics with breakers

    North east USA, I can ship but buyer pays shipping.
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