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  1. HRTKD

    New Victron 50 amp DC-DC Charger

    Hopefully they'll come out with a bidirectional charger. That will help a lot of motorhome owners.
  2. HRTKD

    Docan 280 EVE cells - 2023 Quality check (update: Bad experience - scam beware)

    Sorry, but I don't know the answer to that. I haven't purchased from them. Docan popped up about a year after I bought my cells from China.
  3. HRTKD

    Docan 280 EVE cells - 2023 Quality check (update: Bad experience - scam beware)

    I used to live in Houston and am familiar with where their warehouse is. If I could walk into a place to return a bad cell, I wouldn't have a problem buying from them. Shipping all the way from China is a different matter.
  4. HRTKD

    Is battery equalizer required for batteries in series?

    The higher the voltage, the more expensive some components become.
  5. HRTKD

    Is battery equalizer required for batteries in series?

    You are correct that they don't. Once the voltage gets to a certain point ( > ~48 DC) the ability to handle the arc get's a lot more important. Something like that.
  6. HRTKD

    Is battery equalizer required for batteries in series?

    Yes, the specs are right. Up to 60v DC and up to 300 amps. Would I use it? Probably not. I paid five times that for a Blue Seas disconnect switch. Now maybe I overpaid, but Blue Seas is a trusted vendor here on the forum. I would be reluctant to put my trust in a $10 disconnect switch. If...
  7. HRTKD

    Is battery equalizer required for batteries in series?

    I do not. I looked around last year and came up empty. No reasonably priced ones.
  8. HRTKD

    Is battery equalizer required for batteries in series?

    Yes, that would work. I'm not sure how worthwhile the shunt on each battery series will be. You'll still need to monitor each 12v battery to make sure its state of charge is similar to the other three 12v batteries within the series. Make sure your shutoff switches are actually rated for more...
  9. HRTKD

    Is battery equalizer required for batteries in series?

    The PowMr Battery Equalizer sounds like the better option. A LiFePO4-aware device is preferred. A shunt goes on the negative side.
  10. HRTKD

    A Question on MPPT Controllers

    10 awg is indeed the largest size wire that the 100/20 will accept according to the Victron spec sheet. The 100/50 will accept up to a 6 awg wire, even with a ferrule on it.
  11. HRTKD

    A Question on MPPT Controllers

    I have the Victron 100/20 as well as two Victron 100/50 solar charge controllers. All three use fine stranded wires (6 gauge welding cable) with ferrules as well as strain relief clamps. These are installed in my bumper pull toy hauler camper. I've been down some very rough roads as well as...
  12. HRTKD

    How long can you (and your family) survive if the grid went down for an extended period?

    Similar problem up in Oregon. I don't know if the bounty is still available.
  13. HRTKD

    MOTORHOME LiPo CHARGING QUESTION

    Sure, you just have to track down the wiring coming from the alternator. I did that on my camper. No charge from the tow vehicle is used on the house batteries. If you have a generator, you'll have to take into account the voltage and amperage that it requires to start and continue to run.
  14. HRTKD

    JK-BMS B2A8S20P (11.2 version) temperature 86.3°C (187.34°F) too high ?

    If it's a poor connection with the extension, then that could be the problem. I would expect the wires to be hot too.
  15. HRTKD

    Utility Company Charging an overage fee that doesn't add up

    Not a problem. You're not the first to do that. Welcome to the forum!
  16. HRTKD

    Utility Company Charging an overage fee that doesn't add up

    The OP hit Report instead of Reply. Here is the reply that was reported:
  17. HRTKD

    LiFePO4 heating pad for cold temperatures

    I don't see why not. As long as you have a way to keep the AGM charged.
  18. HRTKD

    enclosure for BMS and connectors?

    Very nice! That's a better way to mount the BMS than I was thinking of.
  19. HRTKD

    Tell me how please

    Yes, the battery bank that is being warmed is the power source for the warming pads. With a good amount of insulation (to retain the heat) the pads don't draw down the battery much. Here is my write-up of my warming system: https://diysolarforum.com/threads/lifepo4-battery-warmer-install.14485/
  20. HRTKD

    Tell me how please

    More or less. The more insulation you provide around the battery, the less the warming system has to do and the quicker the battery can begin charging. More insulation means your available space may not be enough. I have a DIY LiFePO4 battery bank with a custom warming system that keeps the...
  21. HRTKD

    Tell me how please

    Most of the LiFePO4 batteries with built-in warming, do not use the battery to power the warming system. Instead, the BMS diverts power from the charging source to the warming pads. With PV as your charge source, that charge current is only present when the sun is up. That means that during...
  22. HRTKD

    Tell me how please

    This is how I have my dash cam connected. Some brands have a dedicated battery that is available only to the dash cam that is used to keep the dash cam running when the engine is off. That may be a simpler solution than connecting PV to both house and starter batteries. It depends on how long...
  23. HRTKD

    Tell me how please

    Some dash cams are battery voltage sensitive and turn off at a certain battery voltage. It may depend on how you wire it up. It sounds like the OP wants his dash cam active all the time, so an external charge is needed to prevent the battery from getting drained to zero.
  24. HRTKD

    Tell me how please

    I would not use flexible panels. They haven't lived up to the hype. You could put in separate panels for each "system". Or, you could put in one panel that goes to one of the batteries, then a DC-DC charger off of that. I put in Victron Energy components. I'm happy with it, but Victron...
  25. HRTKD

    Final check on my 1200ah/2400w 12v system installed on a 33ft Winnebago before I power it up

    While you can make your own communication cables, there are a good number of posts on the Victron Community forum where user-made cables caused issues. The cables aren't that expensive. I have cable, connectors and tools. I still used the Victron cables. From a tidyness standpoint, making my...
  26. HRTKD

    Tell me how please

    If temperatures below 32°F (0°C) are a concern, then LiFePO4 may not be an ideal battery for you. There are ways to work around the limitation of not charging under 32°F, but that adds expense to the solution. AGM is a good fit. Consider using a single, large residential panel. Just one. It...
  27. HRTKD

    New Victron 50 amp DC-DC Charger

    While I haven't priced the new Orion XS, it is configurable so you can set it to output only 20 amps instead of the full 50 amps.
  28. HRTKD

    Fridge advice and guidance.

    I'm waiting for my absorption RV refrigerator to die. At 17 years old, it's days have to be numbered. But it still works. I looked around for a compressor replacement that fit that exact space. While I'll gain a lot of interior cubic feet, there isn't going to be a huge improvement in the...
  29. HRTKD

    Weird RV 12V issue. Only getting voltage from genset starter battery.

    In my travel trailer I isolated the generator starter battery from the rest of the LiFePO4 system. The generator starter battery is charged by a separate converter that only charges that battery. That way, should my LiFePO4 battery bank be completely drained I can still start the generator...
  30. HRTKD

    Eve 105 with questionable (reprinted?) QR code

    The stickered QR codes are a bit sketchy. Initial charging can vary from batch to batch. How old they are is another factor. To really know if you didn't get what you paid for, you'll have to do a capacity test.
  31. HRTKD

    RV Mount Tilt Solutions for Residential panels?

    I have an aluminum "salvage" yard that I stop in at every few months. Most of the stuff they have is brand new, not scrap. I came upon a large box of aluminum hinges in their cutoffs section that were being sold by weight. I grabbed a few and am holding on to them for a future project. These...
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