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    Silicone grease on your MC-4s, any mileage?

    This was discussed recently https://diysolarforum.com/threads/147-volts-dc-will-not-pass-thru-breaker-yes-breaker-is-on.72644/page-3#post-958803 A hostile environment certainly makes a grease attractive, but you need to know your rubber before you select your grease. A Dialectic Grease would be...
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    Anyone having trouble with chinese pump controllers?

    Following their own test procedures, it's the FETs that are blown. The two big electrolytics are across the supply, so don't work hard at all. I picked up the fresh FETs tonight, so I'll have them installed in the original controller early next week.
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    Anyone having trouble with chinese pump controllers?

    That's a good price - wish I could get them for that price.
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    Anyone having trouble with chinese pump controllers?

    Thanks for the reply. Normally these pumps ship with a 2m power cable, but I got this one built with full length cable so there was no need for underwater splices and sourcing waterproof cable - naturally, delivery was a bit slower, but it wins on several other fronts. Yep - it's an impeller...
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    Anyone having trouble with chinese pump controllers?

    I put in a bore a couple of years ago with a chinese bore pump (nominally 72V, 750W, 5m3/h) It worked well for two years and then the controller failed. The pump is 3ph which is generated from the (DC only) controller which has a few user configurable parameters, but is mostly locked down. The...
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    Epever 6415AN dual rs485

    I think the only real purpose of having two serial ports is to simplifying the cabling (RS485 allows multiple devices to be daisy-chained on a single serial cable). Making a daisy-chain cable require some skill and the correct tools to make, where as two sockets allows the use of 'standard'...
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    147 volts dc will not pass thru breaker (yes, breaker is on)

    I believe that is the key to the design - the less parts the installer has to juggle while trying not to fall off a roof, the better the chance the connector is assembled complete and correctly (it also removes the temptation to use a shell after loosing the gland).
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    147 volts dc will not pass thru breaker (yes, breaker is on)

    Same with sex toys - never use silicon lube on silicon rubber. black o-rings are likely to be a nitrile rubber, while orange are probably a fluro-elasomer Vaseline will destroy latex, but is ok on silicone. You need to know your "rubber" before you pick your lube.
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    147 volts dc will not pass thru breaker (yes, breaker is on)

    Try buying better connectors. If you need to pull every connector apart to get it on the cable, you are doing something wrong.
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    147 volts dc will not pass thru breaker (yes, breaker is on)

    +1 MC4's are designed expressly so you don't have to disassemble them
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    Epever charge controller dropping out of MPPT mode

    try this https://www.epever.com/upload/file/2107/EPEVER-Datasheet_Tracer-BN.pdf Charge Controller or the new (beta) Solar Guardian should both work. (SG is a bit half baked at this stage, but looks promising) For firmware, you need to contact support directly and ask...
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    Epever charge controller dropping out of MPPT mode

    Ah - ok. I don't need hugely accurate readings - mostly just to keep an eye on the multiple systems to make sure they are working correctly. I use a combination of Wifi, UTP and fibre to allow my regs to be interrogated simultaneously over a wide area (and from anywhere with internet) Both the...
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    Epever charge controller dropping out of MPPT mode

    Thanks. Can't see BT working for me with multiple (and spread out) regs.
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    Epever charge controller dropping out of MPPT mode

    How do you do comms with the Victron regs? I've got all my epever's networked (one of the reasons for choosing them)
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    Epever charge controller dropping out of MPPT mode

    I'm using 12xx and 22xx regs. I'm assuming the two versions reported are: Hardware / Firmware respectively?
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    Epever charge controller dropping out of MPPT mode

    Now I know what to look for, yes, I'm seeing it - but. This plot is from this mornings sunrise. The PV voltage comes up to the battery voltage and is "clamped" there. These panels are oriented true north, so even at this time of year, it take 30min before the panels are usefully illuminated. The...
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    Starting off my first Solar setup, got a few questions.

    Mixing a random assortment of panels has it's trade offs too. I know of one MPPT with USB, but it does seem a common tell. A used 175W panel is a ~$20 purchase - not a big deal. In what way is a 175W panel "not consistent" with three other 175W panels?:unsure: I think you are arguing against...
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    Starting off my first Solar setup, got a few questions.

    Yes - poor, but not negligible. I assume anyone putting together an array with such a spread of panels is on a tight budget and probably wants every Watt they can get. first - that's not how I'd do it. I found a house about to be demolished and did a deal where I stripped 12x 270W panels from...
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    Starting off my first Solar setup, got a few questions.

    Quite! I like the arrangements above, but I'd aim for 80V as it gives better performance in low light. Higher voltage also let you run much cheaper cable to regulator. "Quality fuses" are rated to operate up to their rated capacity. Yes a margin is good, but a fuse operating below it's rated...
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    4x100w panels in parallel - to fuse or not to fuse

    Under what circumstances would a 15A fuse blow while "protecting" a 100W panel? [making an assumption your 100W panel is 21Voc, that's about 5A] So I repeat the question: When will a 5A panel blow a 15A fuse? Fuses are one of the simplest electronic components, but still poorly understood. A...
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    Why This Subforum Exists.

    It's not the accounting that is of interest - it's the potential for transients to exceed the limits of the SCC when a battery is disconnected. Effectively, a large enough capacitor will look to the SCC like a battery is still connected. The nature of a capacitor is that it will resist a change...
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    Why This Subforum Exists.

    Your panels - clearly!
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    Why This Subforum Exists.

    While I agree, it doesn't really apply here. The higher the capacitance, the greater the ability to smooth transients. Too low and it doesn't really do anything Too high just costs more, but doesn't really work any better. Neither too large or too small should result in catastrophic failure...
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    Why This Subforum Exists.

    If it goes bad, I'll post pics! It's been six months with many connects/disconnects and the SCC's all seem happy. The wild glitches are gone and you can barely see a transient on the graphs. From what I'm seeing, I wouldn't go lower than 10000uF and my preference would be for double that.
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    Why This Subforum Exists.

    The above two systems are still behaving well, so I added a cap to the third system where the battery is routinely disconnected. This time I used a 10000uF 25V and works just almost as well as the other two. Watching the Batt. Voltage graphs, there is a little oscillation when the battery is...
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    My DC breaker board - OK or redisgn ?

    Great! Just making sure you were aware of ways it might not behave as you want. I'm thinking you want some sort of indicator to flag that one of the breakers has tripped.
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    My DC breaker board - OK or redisgn ?

    Just wondering what your intention is with the two 125A breakers? 3kW @ 24V = 125A So, you should be able to pull full load from the inverter with one battery disconnected - but do you want to? With your board out of sight (in a box) and the system apparently working perfectly, you could have...
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    Is it possible to overclock a victron 75-15 solar controller?

    No. Panels in SERIES - the voltage ADDS, but the current remains the same. (the power ADDs) Panels in PARALLEL- the current ADDS, but the voltage remains the same. (the power ADDs) Nothing multiplies (ever). The 75-15 will provide a max 15A charge current
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    Why This Subforum Exists.

    Anyone? Can anyone think of a reason how this could go bad? (so far, both seem to be working perfectly)
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    Why This Subforum Exists.

    Hi all, I use several systems (PV, SCC, Battery) in a way the SCC manufacture says you shouldn't do (hence posting in this section). In order to keep [portable genset, mower, tractor, etc.] batteries from going flat when not used, I've got them on their own chargers. This works really well, but...
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    Breaker for Battery bank

    :) Rules are great, but context counts for something too. Good luck finding a 183.823529412 A fuse A 200A fuse might be easier to come by!
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    Epever charge controller dropping out of MPPT mode

    Hmm .. yeah, it can be uncooperative. If the USB drivers don't load automatically, you've got to find your own. Once it's running, it gives you a lot of control.
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    Breaker for Battery bank

    Any appropriately rated change-over switch would do the job. There are plenty of purpose made switches sold for the purpose. Typically, battery isolator switches offer Off, A, B, A+B input options. They are commonly used on trucks and boats if you are looking for a local stockist.
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    12v pump won't turn on

    Ebay seller not being completely honest - surely you jest :ROFLMAO::ROFLMAO::ROFLMAO::ROFLMAO: 10A is a lot of power for a pump to draw if it's less than full load @OzSolar , do you have an opinion as the lifespan of the helical/screw pumps? For myself, the cheap pump was planned for a low...
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    12v pump won't turn on

    I've installed one of that type from my own use in the deep bore. I ordered direct and got a special build - for a modest additional fee (and waiting for delivery instead of local dispatch) I received a pump with 50m of cable. The two advantages are: 1. there are no joins under water 2. I'm...
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