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  1. FilterGuy

    Schematic Review Please

    Is that supposed to be 4/0 AWG? 4 AWG is too small.
  2. FilterGuy

    Schematic Review Please

    50A on the 24V side is over 100A on the 12V side. That seems like way too much for a 120A alternator. (Alternator ratings are for their peak current in the best conditions. )
  3. FilterGuy

    Schematic Review Please

    Are you using the ABYC ampacity tables? (I am guessing you are because the wire sizes are way too small for the NEC tables)
  4. FilterGuy

    Top Balance

    There is not enough information given to answer that question. If there is no BMS, getting 4 years without top balance is pretty dang good If there is a BMS with a good balancer configured properly, you should never have to top balance. If there is a BMS with a balancer misconfigured, you...
  5. FilterGuy

    Complete guide for 48V using EG4 18k

    Nice! That means there is no issue with the 120% rule. IMHO. Any 200A main panel being installed for a residential system today should have at least 225A bus bars even if there is no current plan to add solar. I conquer. Each string has ten 400W panels for a total of 4000W each or...
  6. FilterGuy

    Complete guide for 48V using EG4 18k

    Your current system intrigues me. 1) What is the current rating of the Busbars in your main pannel? Many 200A AIO service panels like yours only have 200A busbars. If yours are 200A busbars, it would mean the system can exceed the NEC 120% rule by 11.25A. 2) What is the meter on the PV...
  7. FilterGuy

    Maximum PV current input

    I wonder what is causing the 30A limit?
  8. FilterGuy

    Maximum PV current input

    That is correct. However, as @sunshine_eggo said, you must not exceed the ISC limit of the MPPT input. Note: Having an ISC limit is somewhat common. (Victron lists a similar limit). To tell the truth, I have never fully understood the engineering behind the limit but apparently, in...
  9. FilterGuy

    Ground rod specifics

    I am not aware of a rule about the distance.... but that does not mean there is not one. Hopefully someone can chime in if there is a limit. The rule of thumb is that the rods should be at least as far apart as that are long. In this case they should be 8' apart from each other. I am not...
  10. FilterGuy

    Is there any harm in using a higher than normal float voltage to compensate for lack of input overnight?

    1st: I agree with this statement. I think most of the forum would agree with it as well. HOWEVER: Many battery companies set up their battery BMS with no float at all. This puzzles me because I have always believed LiFePO4 should not be held at the charge voltage for long periods of...
  11. FilterGuy

    Is there any harm in using a higher than normal float voltage to compensate for lack of input overnight?

    Why so low? The LiFePO4 cells are nowhere near charged at that level. Even 2.4V/Cell is being gentle on the cells. 28V (3.5V/cell) is ok. Many manufactures recommend this or higher. I tend to be a bit more conservative with 3.45V/cell
  12. FilterGuy

    Brightmount modification?

    Pictures or drawings?
  13. FilterGuy

    "Smart" separate port BMS?

    The answer was Yes as soon as you said Daly BMS.:oops: Sorry..... I could not resist the smart-arse comment. In fact, if the BMS is not stopping at the programed voltage, something is wrong that needs to be addressed. 3.75V is not good but as long as it did not sit at that voltage for a...
  14. FilterGuy

    Grounding in a hybrid solar setup.

    That depends on the type of inverter. If your inverter is a hybrid inverter, then it can export as well as import power. However, the term AIO is not usually applied to a hybrid inverter. In the more typical definition of an AIO, the AC in will only draw power. It can be used for both...
  15. FilterGuy

    6 EG4 WallMount Batteries + 3 EG4 6000XP Inverters

    The 6000XP has gen boost. Your generator should work just fine.
  16. FilterGuy

    6 EG4 WallMount Batteries + 3 EG4 6000XP Inverters

    As said above, there will be a little bit of uneven wear, but I would not worry about it. THe cycle count on these is so high it won't make a difference. furthermore as one battery gets weaker over time, the other will start taking more of the load. For the most part each inverter will...
  17. FilterGuy

    6 EG4 WallMount Batteries + 3 EG4 6000XP Inverters

    The other thing I would do is drop the combiner box and feed the inverters directly into the main panel... But that assumes there is room in the main panel for three 40A 240V breakers. I know Will likes the combiner box arrangement, but I don't see the point.
  18. FilterGuy

    6 EG4 WallMount Batteries + 3 EG4 6000XP Inverters

    At first glance your plan looks pretty solid. One thing you should consider is to use the battery paralleling kits to parallel sets of three batteries and then use busbars to tie the two sets together. This would be entirely within the specs of the inverters and batteries Alternatively I...
  19. FilterGuy

    Mixing Hybrid and On-Grid

    What is your definition of Grid Tied and Hybrid? (I don't like the term Grid Tied because it means different things to different people) Since you are saying both can export, I assume the grid tied is either a string inverter or a micro inverter (Micro Inverters should be called micro-string...
  20. FilterGuy

    Newbie setup questions from Bay area

    Cool I am down in Los Gatos.
  21. FilterGuy

    Newbie setup questions from Bay area

    What part of the bay area?
  22. FilterGuy

    Anyone know the current status of the neutral bond issue with the EG4 3000?

    The 3000 does not have software to turn off the dynamic bonding.
  23. FilterGuy

    What gauge wire for N-G bond?

    So.... 8KW is 8000W/240V=33A. The jumper should be an 8AWG
  24. FilterGuy

    What gauge wire for N-G bond?

    What Wattage is the Inverter?
  25. FilterGuy

    EG4 18Kpv Rapid Shutdown - No clear instructions

    >He said he’s getting one amp per RSD module on the strings, I am not sure what that means. Does that mean he is getting a total of 5 amps on each string? What voltage is he getting at the PV connections to the inverter?
  26. FilterGuy

    House burned down

    This is something I have wondered about for quite a while. They support Megafuses in all their gear and sell 48B versions of Megafuses, but they never really address the AIC question. Several months back I had the chance to talk to a Victron 'ambassador' about a system and he was...
  27. FilterGuy

    EG4 Lifepower4 48V Top Balancing Firmware.

    Brobably nothing to worry about. The BMS will detect the overvoltage and turn off charge before the cells are damaged.
  28. FilterGuy

    House burned down

    So sorry to hear!!! But thank you for sharing. The large DC current we deal with needs to be respected. I am curious, where in the circuit was the fuse, and was the arc across the fuse gap?
  29. FilterGuy

    Top Balance question

    Patience Grasshopper. Patience.
  30. FilterGuy

    Top Balance question

    As long as the Power Supply is correctly set to the target voltage, there should be no reason to worry about over-charging the cells. At around 3.45 volts the current will start tapering off and the voltage will start going up. This will accelerate till the charge is complete. You have...
  31. FilterGuy

    Top Balance question

    That cell started with a higher SOC or was a 'weaker' cell. This is normal.
  32. FilterGuy

    Top Balance question

    OK. Now it is a matter of being very patient. Set the target voltage on the Power supply before you hook it to the parallel cells and then hook it up and wait. No matter how tempted you are, DO NOT raise the voltage on the power supply.....
  33. FilterGuy

    Top Balance question

    Lets do some math. I assume these are new cells. New cells generally come at ~40% SOC. 16 280Ah Cells in parallel will need .6 X 16 X 280 = 2688 Ah to fully charge. At 20A this will take 2688/20=134Hrs to fully charge. Yes, it is normal. Keep in mind that at 3.3V 20 A is only 66W...
  34. FilterGuy

    Creation of vertical development lifepo4 bench

    I don't have a reference, but have thought about it some. The idea of a very flat profile pack is intriguing to me. If you decide you need cell compression, these layouts could be challenging.
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