Page 3 of 5 FirstFirst 12345 LastLast
Results 21 to 30 of 42

Thread: LiFePO4 or Lead Crystal to replace AGM?

  1. #21
    Join Date
    Jan 1970
    Location
    Queensland
    Posts
    6,241
    Hi Milton and that is actually good info.

    Are you interested in seeing if they can be revived.

    If so, start by separating them and charging each one again.

    Then try your load test again, on each battery while they are separated.

    From that discharge data, because the batteries did not immediately go flat, you might find one one of the batteries is OK, and was carrying the faulty battery.

  2. #22
    Join Date
    Jan 1970
    Location
    Kallangur, Brisbane
    Posts
    614
    Good suggestion Drivesafe, I'll try that thanks.
    + 2016 D4 TDV6
    + Self built 17' off road caravan
    - D2 TD5
    - P38
    - D1 V8
    - 2 x Classic Range Rover
    - Series III 109
    - Haflinger with BMW boxer engine

  3. #23
    Join Date
    Feb 2014
    Location
    Adelaide
    Posts
    176

    It's a new "System"

    Hi, I made the leap to LiFePo4 in my van about a year ago, I did a major upgrade to the complete system. My very strong advice is that it has to be regarded as a system change, not a battery change, and along with it a paradigm change in how you utilise your electrical energy storage. LiFeP04 is just fantastic, it's ability to supply high current draw and maintain 13V while doing it for extended periods of time is the first in a long list of advantages over Sealed Lead Acid (SLA), and the paradigm change is that you have to use them differently, they are not SLA, do not use them like you use SLA. So here is the trap, there is a lot of poor information out there so do your research and make up your own mind, it is your money, and usually quite a lot of it.

    Peter
    MY13 D4 Nara Bronze HSE, Almond Interior, E-Diff, 20" for the road, 18" GOE for the fun stuff, Traxide, OL Bar, GAP IIDTool, Pioneer Tray, DAB+ retro-fit, Vintage SAV Marchal Driving lights (weird I know but what can I say).......more to come

  4. #24
    Join Date
    Jan 1970
    Location
    Kallangur, Brisbane
    Posts
    614
    Hi Peter, thanks. Could you maybe expand a little on what you have said. Did you have the system fitted professionally or did you fit it yourself? Does your van have combination charger/inverter devices? Do you charge the batteries with the tug while driving? How much solar do you have & what size LiFePo4 pack did you fit?
    + 2016 D4 TDV6
    + Self built 17' off road caravan
    - D2 TD5
    - P38
    - D1 V8
    - 2 x Classic Range Rover
    - Series III 109
    - Haflinger with BMW boxer engine

  5. #25
    Join Date
    Feb 2014
    Location
    Adelaide
    Posts
    176

    More detail

    Quote Originally Posted by Milton477 View Post
    Hi Peter, thanks. Could you maybe expand a little on what you have said. Did you have the system fitted professionally or did you fit it yourself? Does your van have combination charger/inverter devices? Do you charge the batteries with the tug while driving? How much solar do you have & what size LiFePo4 pack did you fit?
    I fitted the whole system myself, 300Ah LiFeP04 battery (with BMS), Victron Energy Multiplus 3000w inverter/charger [fully programmable with dedicated voltage sensing, I can not understate how important dedicated voltage sense is] Victron Energy 100/50 solar controller, [again fully programmable] 840w solar panels [simply] and VE battery monitor, most importantly a programmable low voltage cut off protection for the battery from Intervolt. You must not rely on the battery management system cut off to provide a low voltage safety cut off point for the system, it's only there as a OMG panic stations savior.

    I can be using the microwave or coffee machine (a George job) the inverter is pulling 120 to 130A, turn on the van water pump, TV, lights whatever and not so much as a micro hiccup. I do not charge from the D4, absolutely no need.

    Peter
    MY13 D4 Nara Bronze HSE, Almond Interior, E-Diff, 20" for the road, 18" GOE for the fun stuff, Traxide, OL Bar, GAP IIDTool, Pioneer Tray, DAB+ retro-fit, Vintage SAV Marchal Driving lights (weird I know but what can I say).......more to come

  6. #26
    Join Date
    Jan 1970
    Location
    Queensland
    Posts
    6,241

  7. #27
    Join Date
    Jan 1970
    Location
    Kallangur, Brisbane
    Posts
    614
    Quote Originally Posted by PeterJ View Post
    I fitted the whole system myself, 300Ah LiFeP04 battery (with BMS), Victron Energy Multiplus 3000w inverter/charger [fully programmable with dedicated voltage sensing, I can not understate how important dedicated voltage sense is] Victron Energy 100/50 solar controller, [again fully programmable] 840w solar panels [simply] and VE battery monitor, most importantly a programmable low voltage cut off protection for the battery from Intervolt. You must not rely on the battery management system cut off to provide a low voltage safety cut off point for the system, it's only there as a OMG panic stations savior.

    I can be using the microwave or coffee machine (a George job) the inverter is pulling 120 to 130A, turn on the van water pump, TV, lights whatever and not so much as a micro hiccup. I do not charge from the D4, absolutely no need.

    Peter
    Thanks Peter, well done building it yourself. Some food for thought there. I take it you bought the battery complete with BMS rather than assembling the battery + BMS yourself. I am considering building from scratch.
    + 2016 D4 TDV6
    + Self built 17' off road caravan
    - D2 TD5
    - P38
    - D1 V8
    - 2 x Classic Range Rover
    - Series III 109
    - Haflinger with BMW boxer engine

  8. #28
    Join Date
    Feb 2014
    Location
    Adelaide
    Posts
    176
    Yes the issue of cost is always the biggie, but I have some specific requirements that I wanted to accommodate and simply did not want to do the generator thing, the answer is approx $10k, remembering that a lot of that is on equipment that anyone could spec into a FLA system or for that matter Lead Crystal. I have no exposure to Lead Crystal at all so can not comment about them.

    I was going to build my own battery initially, CALB cells, build my own mounting box (compression plate) and use a commercial BMS but I became aware of a "sale" that included exactly what I wanted and when I did the numbers there was not a real lot in it. There was also a bit of a time issue for me at that point and the process of top balancing the individual cells, assembly and then running base line capacity checks was going to take a while.

    I did a base line check on my battery and without boring you to tears I charged it to 14.02 (no load, about 13.7 loaded) and set my cut off at 11.8V (loaded). I hooked up a 750W bar heater to the inverter and turned it on. 4 hours and 43 minutes later it hit the low voltage cut. The Victron Energy battery monitor indicated 288Ah from a nominal 300Ah capacity and when you factor in the inverter efficiency I was very happy with the result. I run much more conservative cut out ordinarily but there you go.
    MY13 D4 Nara Bronze HSE, Almond Interior, E-Diff, 20" for the road, 18" GOE for the fun stuff, Traxide, OL Bar, GAP IIDTool, Pioneer Tray, DAB+ retro-fit, Vintage SAV Marchal Driving lights (weird I know but what can I say).......more to come

  9. #29
    Join Date
    Jan 1970
    Location
    Kallangur, Brisbane
    Posts
    614
    Thanks Peter. Does the Victron Energy 100/50 solar controller charge the batteries direct or through the Multiplus?
    + 2016 D4 TDV6
    + Self built 17' off road caravan
    - D2 TD5
    - P38
    - D1 V8
    - 2 x Classic Range Rover
    - Series III 109
    - Haflinger with BMW boxer engine

  10. #30
    Join Date
    Feb 2014
    Location
    Adelaide
    Posts
    176
    Hi Milton, out of convenience I used the terminals on the MultiPlus as a connection point for the solar feed from the 100/50, but in hind sight it was actually a mistake because it made setting up the voltage cut relay more difficult. Oh well, next time......

    Having read other bits of this thread again I thought you might be interested to see the graph of my capacity test. It was manual data collection every 10 minutes and not a data logger unfortunately but it was a lot of fun.

    Capacity_Test.JPG
    MY13 D4 Nara Bronze HSE, Almond Interior, E-Diff, 20" for the road, 18" GOE for the fun stuff, Traxide, OL Bar, GAP IIDTool, Pioneer Tray, DAB+ retro-fit, Vintage SAV Marchal Driving lights (weird I know but what can I say).......more to come

Page 3 of 5 FirstFirst 12345 LastLast

Tags for this Thread

Bookmarks

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Search AULRO.com ONLY!
Search All the Web!