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  1. smoothJoey

    Batteries aren't charging too full, what I'm I doing wrong?

    Please verify the max charge voltage for your chemistry. I'm thinking its 3.6 volts nominal and 4.2 volts max per cell.
  2. smoothJoey

    Do I need to top balance ?

    It seems my terminology has "5 question mark" confused you. :) Delta refers to the voltage differential between the highest and lowest cell. Knee refers to the extreme ends of the charge curve for lifepo4 cells. I tried to link directly to the data at...
  3. smoothJoey

    Inverter/Charger - Obvious to someone just not obvious to me

    Or you could just sell the inverter/charger you have and get one with the "drinking bird" feature baked in. It won't be calld "drinking bird" though. Different brands call the feature by different names.
  4. smoothJoey

    Inverter/Charger - Obvious to someone just not obvious to me

    @PriusFan you could make drinking bird with 1of these https://www.victronenergy.com/battery_protect/smart-battery-protect and one of these https://dlidirect.com/products/iot-power-relay The smart battery protect turns the shore power on/off based on system voltage...
  5. smoothJoey

    Do I need to top balance ?

    Anyways that is the simple version. I left out some detail to make it easier to swallow. Can fill in the blanks later.
  6. smoothJoey

    Do I need to top balance ?

    Cells can be really close at "shipping" voltage but still quite un-balanced at the top. So the answer is, we don't know. Its getting more popular to assemble the cells into a series pack complete with bms and charge them up to see if a top balance is required. If it is you can top off the cells...
  7. smoothJoey

    What are issues charging LiFePO4 with Magnum Mm1212?

    Does it not have a user or custom profile that allows all the charge parameters to be configured?
  8. smoothJoey

    Review my 48V off-grid garage using Victron gear

    If I had a shunt I would probably do it the same order as you. My pleasure to help.
  9. smoothJoey

    Review my 48V off-grid garage using Victron gear

    Victron Lynx power in doesn't support fuses, are you doing this trick? Nice drawing of a nice design. You have the shunt and BMS reversed from the orthodox setup. Its not wrong but worthy of note. I suggest you take your shunt's positive feed from the system side of the class-t fuse. That way...
  10. smoothJoey

    New System Questions

    IMO the advantages are with the inverter/charger. In addition to a big iron transformer the Inverter/chargers typically have a microprocessor which allows them lots of features and granular configuration. The also typically have an automatic transfer switch that syncs the inverter to the mains...
  11. smoothJoey

    New System Questions

    Discrete = inverter only without an integrated charger and automatic transfer switch.
  12. smoothJoey

    New System Questions

    Which pretty much means low frequency inverter. Which pretty much means inverter/charger. I can't think of a discrete low frequency inverter.
  13. smoothJoey

    60a DC-DC Charger only pulling about 40a

    These are the dip setting for the 2 profiles that I think you should use. They are the same except the lead acid one has float. off is up down is on lead acid bulk/absorb=14.4 volts float=13.2 s1=on s2=on s3=on s4=off s5=on lithium bulk/absorb=14.4 volts...
  14. smoothJoey

    DC to DC charger size questions

    https://diysolarforum.com/threads/dc-to-dc-charger-size-questions.29692/post-357990
  15. smoothJoey

    60a DC-DC Charger only pulling about 40a

    "Mondo" is a contextual adjective. In this case it rhymes with "big honkin".
  16. smoothJoey

    60a DC-DC Charger only pulling about 40a

    Since you have a mondo amplifier, have you done the "big three" upgrade? As in battery.neg to chassis, engine_block.neg to chassis, and battery.pos to alternator.
  17. smoothJoey

    60a DC-DC Charger only pulling about 40a

    Also do a test with and without your amplifier. Remind my how big is that new alternator is?
  18. smoothJoey

    60a DC-DC Charger only pulling about 40a

    if you have an amp clamp I would like to no how much current is on the input wire. also you never described your charge profile.
  19. smoothJoey

    60a DC-DC Charger only pulling about 40a

    check the voltage at the battery with the alternator running but the charger disabled. repeat test with charger running. report back.
  20. smoothJoey

    Batteries aren't charging too full, what I'm I doing wrong?

    What chemistry are the cells?
  21. smoothJoey

    60a DC-DC Charger only pulling about 40a

    @moonlitsouls what rpm is the engine at when you only get 40amps output?
  22. smoothJoey

    60a DC-DC Charger only pulling about 40a

    @moonlitsouls please post clear, bright, hi def, hi contrast pictures of the core of the system.
  23. smoothJoey

    60a DC-DC Charger only pulling about 40a

    I speced 4 awg because @moonlitsouls has a ton of excess alternator capacity. Its cheaper, easier to run and it consolidated his bom. 60 amps on the output side is ~66 amps on the input side plus a bit to compensate for the voltage drop. @moonlitsouls what charge parameters are you using...
  24. smoothJoey

    Rv hook up

    Probably will be fine but non inverter generators sometimes don't hold frequency well and that is a potential problem.
  25. smoothJoey

    Rv hook up

    What is a genie?
  26. smoothJoey

    Class T fuse and holder... bigger than i thought.

    I have that one. Mine was branded "go power". I swapped out the mechanical lugs for ones that fit my 2 awg wire better.
  27. smoothJoey

    Rv hook up

    Since the pip is also includes a charger and an automatic transfer switch just disable the converter.
  28. smoothJoey

    Top Balancing using a PSU: is this exactly the other way around?

    Found it. 20:45-22:00
  29. smoothJoey

    Top Balancing using a PSU: is this exactly the other way around?

    I can't seem to find it now but a recent video by Andy from off grid garage showed that the cell voltage registers incorrectly when b- is not connected to the pack. Kind of like b- is a sense lead or something.
  30. smoothJoey

    Rv hook up

    The converter is a component inside the ac/dc distribution center. It's ac connection needs to be moved upstream of the automatic transfer switch on the shore power leg.
  31. smoothJoey

    Rv hook up

    Get an automatic transfer switch. The automatic transfer switch makes shore power and the inverter mutually exclusive Wire the converter in parallel with the shore power. Don't forget to put a fuse or breaker in front of the converter.
  32. smoothJoey

    Top Balancing using a PSU: is this exactly the other way around?

    How do you do this with a commodity fet based bms? I have this one and Its not immediately clear to me how to control a typical bench psu with via the bms. https://overkillsolar.com/product-category/24vbms/
  33. smoothJoey

    Cube Truck Conversion

    Suggest you search the forum for "varicore". I think you can do better. @Amy Wan (Luyuan) and her company have a good reputation here.
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