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  • Victron 100A AutoTransformer & Relay Voltage Between It & Inverter(s) Required to Control It

    When purchasing our solar equipment, we brought up our unique situation of having to run 500 feet of cable between the inverter(s) and the loads at our cabin. The offered solution was to keep the voltage high (240V) so that we could afford the large aluminum trenched cable, and to purchase a...
  • Anybody implemented the "Projects by Everyday Dave" bifacial ground mount?

    If so, how far down did you put the I-beams, did you use concrete, and how has it been in the wind? I'm thinking about doing five arrays of seven doing the same thing Dave did with the same beams and same Renogy brackets, but with a couple differences. Some differences in my setup (other than...
  • Measuring heat pump electrical usage -- anybody using a smart device of some kind?

    We've had our off grid Mitsubishi Hyper Heat installed for about a week now and are loving it. I'd like to measure and log its power consumption. I've seen some devices that you can place around the power cable and it will measure and log the data. Anybody use logging their consumption and if...
  • All Electric Tractor

    After our heavy lifting projects are done on the homestead, would be great to sell the excavator and track loader and get one of these in our goal to be self sufficient. For relatively small tasks, a tractor would be a jack of all trades and in the summer when we do such tasks we'd have...
  • About to spend a lot of money tomorrow on this system (am I making a mistake?)

    Planning on buying the bolded * items tomorrow for our completely off grid homestead. Big purchase for us! Just posting this in case somebody sees something glaring with our mix of components who might sound the alarm and prevent me from making a costly mistake. I'm showing the 22KW ground...
  • Victron MPPTs to 48V DC Bus, Lightning Strike Makes Fuse Blow, What Happens to the Current?

    I'm planning for 2 x 450/200 SmartSolar MPPTs in parallel to supply a combined 400 amp for charging a 48V battery bank. Assuming perfect sunny day and MPPTs are producing full 400 amp for charging. The current will go from the MPPTs through 1 AWG wires (can carry 200 amp) to a set of Lynx DC...
  • What is the minimum current a generator must produce to hook up to a Victron Multiplus II 48/8000?

    We were recently told to consider "minimum input current limit" when selecting a Victron Multiplus II inverter. We are off grid. We looked at the manual, on page 16 under Section "5.1. Standard settings: ready for use," and it says "AC input current limit" is 50A for the 8kVA multiplus II. Or...
  • Need "Ignition Protection" on T-fuses in room with Honda 7000 generator in it?

    Small insulated Solar Shed will have a gas Honda 7000 generator in it that will exhaust to outside the shed. But it will be in there. Do we need to make sure our t-fuses have ignition protection because of that generator?
  • Who here has the best dump load management system going on?

    I've searched and found some discussions, but it seems like this is a mostly untapped thing. Which is strange given all that extra energy that isn't getting used as a result. Down south I'm sure it's no big deal to let all that energy just vanish, but here in Alaska I can definitely use it to...
  • Making a Faraday Cage Room out of 12'D Steel Culvert

    Would this work to protect (fingers crossed) against solar flares and EMPs? I know it's not guaranteed and lots of variables, but the increased sun activity and the chance of solar flares knocking everything out has me a bit concerned given that we off grid solar types are so dependent on our...
  • 12V flooded battery - what voltage to not go below?

    Got a couple of these batteries running some fuel pumps recently set up: https://www.interstatebatteries.com/products/mtp-75dt I think since they're flooded batteries, I shouldn't be taking them down below 50% SOC. But all I have is a voltmeter to throw on them. What voltage should I use to...
  • Pylontech US5000s first turn on & first charge - what current to use?

    I have had these things for about a year, never turned them on until today. Weather last summer delayed our build. No connections, no networking cables, just turned them on to see if I could get some idea of their SOC. I flipped the switch to ON. Then hit the SW button. All light...
  • Custom Wood Battery Rack for 16 x Pylontech US5000 Off Grid

    So the 8 x Pylontech US5000 we currently have stored in our uninsulated solar shed are not braving Alaska winters well. I wasn't sure how much they would heat up with charging and discharging, turns out not much. So when they get below freezing, it throws a wrench into the system...
  • Should I use ferrules with this 600V DC circuit breaker?

    Wire is: 10AWG PV, 2KV, 7 strands, 600V direct burial Circuit breaker is: MNEPV20-600RT High side (++) goes to PV that will put out about 400V. Low side (--) goes to a 450/200 MPPT. I'll have the PV positive PV wire go into this circuit breaker, then on to the MPPT. Precious little online...
  • Any rabbit/chicken owners want to QC my novel design plan?

    The last time I posted on this forum about a design plan, I also had no idea and no experience with the subject matter. Of course that was my plan for solar. After years of getting educated, the solar we finally installed this last summer looked absolutely nothing like my original plan...
  • Can somebody QC this series/parallel/charge controller string plan?

    I cross posted this from my thread in the off grid forum since it is probably more applicable here. Please remove and apologies in advance if that isn't allowed. Can somebody let me know if I'm thinking about this correctly. The image below shows my winter roof string plan. For now I'm...
  • Solar Consultant says no fuse/breaker required between Pylontech batteries & bus bar -- pass the smell test?

    We've seen it done both ways, the Pylontech manual says protection is required between the batteries and the inverter which, I suppose, this design does but many people seem to think fusing or breakers should be put on the Pylontech battery cables before the bus bar and as close to the batteries...
  • Burying PEX A tubing for 500 foot run ten feet underground, okay?

    Can't find anything on how deep is too deep. Our frost can get down there, so to be safe I'm thinking of burying it ten feet down to run water (with some electrical 8 feet down or so). I would imagine at some point the weight of the soil above has to have an effect, but I can't find anything...
  • Pylontech US5000 batteries just stopped communicating with Victron BMS.CAN

    Off grid with 8 x Pylontech US5000 batteries connected to our Cerbo GX through the BMS.CAN. Haven't had any issues in the months since we set it up until today. Today a couple of strange things happened. Battery temps were between 40-50F or so. Light loads. While monitoring the Victron MPPT...
  • Can I have two busbars since my equipment provides 2 positive & 2 negative terminals?

    My MPPT has two DC positive terminals, and two DC negative terminals. Same with my Quattro. So could I wire one of the positives to one positive bus bar, and the other two another positive bus bar (mirrored with two negative bus bars) and have one bus bar tied into four batteries, and the...
  • Solar panel clamps for P1001A unistrut ground mount?

    I have seen clamps for solar panels that attach to the panels and then slide into the unistrut channel, and I'm wondering if anybody can recommend something similar for fashioning our solar panels onto P1001A unistrut. The intent is to have the P1001A mount through the center of the solar...
  • 1 x Multiplus II 48/15000 & 1 x Multiplus II 48/8000 (not in parallel) drawing from same battery bank, supplying different loads -- any issues?

    Off grid setup. After finding out our 48/8000s won't operate in parallel and trying to consider how to future proof our needs, we're considering keeping one of the 48/8000s and then exchanging the other for a 48/15000. Have both of them pull power from the same battery bank, one of them will...
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