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  1. #41
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    Default Re: Portable Lithium Box

    Thanks, lets hope Rain Hard has got some tips for us since it looks like me and you might have the same battery.
    I have the BN 108 1400 without Bluetooth. Does it work for you, or do you have more capacity? Hoping it'll see me through a daily cycle, depending on the panel I get.

    On a side note, are you an Oracle DBA?
    Last edited by leons; 2021/05/07 at 07:55 AM.
    Leon Smith
    2020 Toyota Hilux XtraCab 2.8 4x4
    Fiat 500 0.9l turbo flattie

  2. #42
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    Default Re: Portable Lithium Box

    Quote Originally Posted by oradba69 View Post
    Dont want to hijack the thread but please tell me more. I fitted a Lithium to my caravan but for one or other reason I cant get my Redarc manager 30 to give me a reliable SOC reading of the battery.
    I was thinking of fitting the Victron BT shunt to get a reliable reading via that.
    No experience with the Redarc Manager 30 but it looks like a great compact unit - it also has a proper Shunt (they call it the "battery sensor") so should be able to track the input and output currents, giving you a reliable SOC.
    I am a fan of Victron but I think the Redarc is a class product and I'd try fiddle a bit more to make it work especially as it has the Shunt integral to the load disconnects, etc in the manager unit.

    In my "setting up phase" of the Victron SS, I had to review the following variables (remember that this is for the SOC, your "time remaining" is a factor of the floor you set for your system). These variables assist the shunt in calculating losses in the charge/discharge cycle:
    1. 1st have a Full battery (AC Charger on lithium profile or what the manufacturer says, that's absorption at 14.4V for BlueNova 108Ah)- then manually synchronise the SS to tell it that's 100%
    2. Set "Battery full charge" - although it starts higher, I set mine at 13.3V as the battery seems to settle there after a few days. Originally set at 13V and I think this was the source of my original error/false SOC readings
    3. Peukert exponent (this should be around 1.05) - this is the loss expected due to high amperage discharge and only really effects Lead Acid so set this low
    4. Charge efficiency factor - chargers/cabling show losses depending on their position related to the Shunt - this may need to a bit lower if you have some distance between Shunt and Battery or cabling is small. 99% is ambitious!

    Any how... good luck - here are some pics of the setting screens on the Victron.
    Reinhardt
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    Last edited by Rain Hard; 2021/05/07 at 09:07 AM.

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  4. #43
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    Default Re: Portable Lithium Box

    Quote Originally Posted by leons View Post
    Thanks Woolf,



    A fellow maker of sawdust, I presume! What wood I do without ace machinery ... I also have a big domino, but it won't come into play this build.

    I'm an absolute sucker for nice stuff, and Victron crept into that bracket, sight unseen.
    Also a big Festool slut. Currently on 13 of their tools.
    www.lani4travel.com

    Louis Le Grange

  5. #44
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    Default Re: Portable Lithium Box

    Quote Originally Posted by oradba69 View Post
    Also a big Festool slut. Currently on 13 of their tools.
    Well that makes sense. You have to sell your body to be able to buy their tools.
    Cheers

    ZS5KAD
    3 Land Rover V8's
    NA - TwinTurbo - SuperCharged
    A V6 and an inline 4

    If you fly or drive to an anti-Fracking meeting, you have no business being there and you wont get my ear......

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  7. #45
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    Default Re: Portable Lithium Box

    Quote Originally Posted by oradba69 View Post
    Also a big Festool slut. Currently on 13 of their tools.
    You guys have lots of tom to throw around! - I only have 4 and that's enough (I keep telling myself). No one must take away my Domino!

  8. #46
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    Default Re: Portable Lithium Box

    Also a big Festool slut. Currently on 13 of their tools
    That happy feeling when I walk into the woodshop... But enough of wood, onto electrics!!
    Leon Smith
    2020 Toyota Hilux XtraCab 2.8 4x4
    Fiat 500 0.9l turbo flattie

  9. #47
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    Default Re: Portable Lithium Box

    One of those frustratingly slow days, when you're busy all day, with not much to show. Anyhow, the box is complete, except for a lid and sealer.

    I've added cleats to the floor to take the battery footprint, and cleats to the sides to take the wiring loom.

    Also, a sliding bulkhead for the blade fuse splitter.

    Cleats:
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    The bulkhead slide inserted:
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    The wiring loom on top also takes the battery:
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    And some yoga mat padding as firstline bump protection. Dirk, the entire box will float on a to-be-built rubber cushion:
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    Battery test fit:
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    Anderson loom test fit:
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    Probable busbar layout:
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    Braai time! Beer time!
    Leon Smith
    2020 Toyota Hilux XtraCab 2.8 4x4
    Fiat 500 0.9l turbo flattie

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  11. #48
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    Default Re: Portable Lithium Box

    Very nice boxes ares showed here!

    Dont be afraid to add a fan. Sounds a bit strange - but if you look at the Ecoflow R600 Pro - you can see that the unit is just that strong, because of a good airflow.

    This unit showed here was just available on Crowdfunding and will not be sold unfortunately.... !! The R600 Max has a weaker configuration.

    Everything is inside of the Box with 8.5kg: Wall charger, Solar MPPT Charger, 220V Inverter and a 100W USB-C Socket (who is able to charge a Macbook pro)

    For strong energy flow from wall charging till 220V Devices or charging a MacBookPro - the fan starts to work:



    In the App you can control the fan - but you will lose charging speed:



    I did reviewed it here: https://www.4x4tripping.com/2020/12/...-eindruck.html

    Most of your boxes have stronger components - guess with adding a fan you can help to get more power out of it..

    My Vehicle has a bit too much weight - I did replace my old bulky Power Setup (35kg) with AGM Battery, 25A Booster, Solar Charger, 220V Converter last week.... Did get a lot of space and with less weigt - but to be fair - too with less power.

    Hope to get less afraid on weight bridges now..

    4x4tripping
    Last edited by 4x4tripping; 2021/05/08 at 01:25 AM.
    ___________________________________________
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    http://transafrica2012.blogspot.com

  12. #49
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    Default Re: Portable Lithium Box

    Thanks for your interest 4x4tripping. That is a very neat little box, and I predict that the like (including Goal Zero, Jackery and a growing list of manufacturers) will be the overlanding future.

    They are superb items to have around for those late load shedding sessions (which I'm sure doesn't trouble you in fair Switzerland ), and pack handily into a car for picknicking or camping.

    These built boxes of ours are basically just larger, simpler componentized versions of yours. They allow us to tinker with them, and get just the right balance of power requirements to suit our specific wants and needs. Way more expensive, much bulkier, and of course stunningly beautiful in the eyes of the owner! And what joy in their creation!

    Enjoy your EcoFlow, and keep it cold!
    Leon Smith
    2020 Toyota Hilux XtraCab 2.8 4x4
    Fiat 500 0.9l turbo flattie

  13. #50
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    Default Re: Portable Lithium Box

    Hi All,

    quick update - for Leon and others who have the BlueNova 108Ah (non BT) in their setup.
    I emailed the manufacturer to ask them to clarify the contradiction between their manual and the sticker printed on the battery case regarding Absorption Voltage - one says 14.4V the other 14.2.
    Below is a snip from their email response.
    After watching "Off-Grid Garage" May 8 vid on YouTube - I think either setting may be appropriate if you adjust the absorption time but he fails to consider that the BMS uses the absorption time to balance the cells of the battery. I feel a longer absorption time may be better for battery health.
    Using the Victron SS (you chaps also with the BMV712) I will now stick to the manufacturers (emailed) recommendations and change down to 14.2V Abs with a max Abs of 1 hr and tail current of 100mA (that's 0.1% but the Smart Shunt only accommodates 0.5% so I'll go there) - these look like very "safe" settings, allowing for temperature compensation etc.). The absorption part (as per the above vid) only seems to add a few (2-3) extra Ah so is not so critical for charging but more for cell balancing in my thinking.
    I also question the Float Charge - I'm going to go down to 13.6V (it drifts there in any case) - I'm not a fan of the potential risk of "micro-cycling" of batteries to try to keep them as close to 100% as possible.

    Just my 10c but hope this assists (I'm no electrical engineer - just trying to hack this as best as possible).

    R
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    Last edited by Rain Hard; 2021/05/09 at 04:04 PM.

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  15. #51
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    Default Re: Portable Lithium Box

    The marine ply box has been treated to a shiny, hard finish, and has been wired and commissioned. The battery is charged, and the BMV synched.

    From the top, the negative busbar is connected to the battery via the shunt, the positive busbar via a 275 amp Victron switch. I fashioned the fuse bar from a 12mm thick salad cutting board (HDPE) to take ANL midi fuses. The busbar legs and the Anderson 4 plug holder were 3D printed:
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    From the front, the 4 Andersons, all on 50 amp fuses (so the pretty colors add no value), the on/off switch, the BMV monitor (also there for form sake only), and the low amp panel opening, which is being crafted:
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    Inside the double-volume is the Badger fuse splitter, all on one 40 amp fuse. It will connect to at least three dc sockets that will be panel mounted (dual USB, Hella, Cigar):
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    And the sockets:
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    Leon Smith
    2020 Toyota Hilux XtraCab 2.8 4x4
    Fiat 500 0.9l turbo flattie

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  17. #52
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    Default Re: Portable Lithium Box

    Running the 40 litre Engel. It's alive!

    Click image for larger version. 

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    Leon Smith
    2020 Toyota Hilux XtraCab 2.8 4x4
    Fiat 500 0.9l turbo flattie

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  19. #53
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    Default Re: Portable Lithium Box

    Very "Smart" build

    Looks the business as well, well done!

    I may be paranoid, but is contemplating removing the battery box and 90L NL if the bakkie is used without the need for these items. Purely from a vibration, theft, battery constantly being bombarded with input current and none going out, etc, point of view

    Edit: I have a 60A 12V circuit breaker at the primary battery I normally open to disconnect any DC into the aux if not used.
    Last edited by DCTheron; 2021/05/14 at 04:51 PM.
    Dirk Theron - Life's a journey, enjoy the ride!
    18 Land Cruiser FJ - build to play
    19 Hilux 2.8 GD-6 Auto 4x4 - my best overland build ever
    2013 LC 200 4.6 Petrol V8 - Ex. The best car I have owned, apart from its thirst
    2014 LC 79 V8 - Ex
    2001 LC 105 4.5 EFI - Ex
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    1996 LC 80 UK spec VX 4.5 EFI auto - Ex
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  20. #54
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    Default Re: Portable Lithium Box

    Thanks Dirk!

    I may be paranoid, but is contemplating removing the battery box and 90L NL if the bakkie is used without the need for these items. Purely from a vibration, theft, battery constantly being bombarded with input current and none going out, etc, point of view
    I agree 100%. This box will live next to the tv station to serve during loadshedding. And we quite often use the Engel at home for overflow duty. So the bakkie is empty during normal non-camping days.

    This is precisely why I wanted a truly portable box. It's heavy, but quite easily managable on my own (about 20kg).

    I'm very glad I followed your advice and kept the inverter seperate.
    Leon Smith
    2020 Toyota Hilux XtraCab 2.8 4x4
    Fiat 500 0.9l turbo flattie

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  22. #55
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    Default Re: Portable Lithium Box

    Leons our thoughts are very much aligned
    Dirk Theron - Life's a journey, enjoy the ride!
    18 Land Cruiser FJ - build to play
    19 Hilux 2.8 GD-6 Auto 4x4 - my best overland build ever
    2013 LC 200 4.6 Petrol V8 - Ex. The best car I have owned, apart from its thirst
    2014 LC 79 V8 - Ex
    2001 LC 105 4.5 EFI - Ex
    2013 FJ Cruiser - Ex
    1996 LC 80 UK spec VX 4.5 EFI auto - Ex
    2001 Jeep TJ 4L - Ex
    2006 Jeep Cherokee - Ex
    1989 LC Bundera 1KZ-TE 3L auto - Ex
    1996 Nissan Sani DC 4x4 - Ex

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  24. #56
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    Default Re: Portable Lithium Box

    Yes indeed "it lives" - Leon that looks soooo great - my 10yr old just saw it and said "dad - that's much neater than yours"
    Love those busbars.

  25. #57
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    Default Re: Portable Lithium Box

    Yes indeed "it lives" - Leon that looks soooo great - my 10yr old just saw it and said "dad - that's much neater than yours"
    Love those busbars.
    Thanks Reinhardt. From the mouths of the innocent ! I'm sure a box is a box, it's the function that counts.

    Now it must be put to the test, and earn some knocks, bumps and scratches!
    Leon Smith
    2020 Toyota Hilux XtraCab 2.8 4x4
    Fiat 500 0.9l turbo flattie

  26. #58
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    Default Re: Portable Lithium Box

    Damn, Leon - why didn't you start this thread about 6 months ago when I was starting my build! Not to take anything away from offline valuable advice I received from people like Fluffy.

    I also have the Blue Nova 108Ah and have use it a few times in the wild, connected to 2 x 160W Solar panels via a Victron 100|20 MPPT. In my naivety I am relying totally on solar, as I want nothing connected to my vehicle electrics, apart from maybe my 60l NL fridge connected to the 12V socket in the load bay on cloudy days. Of course this also means I will need to be driving at the time.

    Instead of a box, I went for a "DB board" approach, and have my BH plugs, circuit breakers and fuses all mounted on that, and the board in turn mounted at the front of my canopy. Happy to share pics if it will serve any purpose or is of interest.

    My battery is mounted onto a 15mmm plywoood board that covers my entire load bay, and sits on about a 5mm thick rubber sheet. I have protected the battery terminals from accidental shorts with a piece of wood, that also acts as a bracket for the battery. I have built a little wooden "bridge" over the battery and mounted my compressor semi-permanently on top of that.

    One thing that has caused me concern on this thread is all the talk of various setting for Absorption voltage and and and. I set up the Victron with the defaults (obviously setting the battery type), and am just running it like that. So far so good, but the most I've run the system is about 6 days, and those were sunny Northern Cape days. Should I be concerned about all these parameters, or will defaults do the job adequately?

    For the record, after a late afternoon heavy session with my compressor (helping fill a de-beaded tyre) and runnig the fridge overnight, it took about 3-4 hours to recharge the battery to full. Usually it takes about 2 hours of fairly early morning sun (say 08:00 - 10:00) to fully charge the Blue Nova.
    Rob Kirk

    Amarok V6.
    Sym 200 scooter 2 x 1, CVT transmission, 4V OHC, 11.4 kW, 15NM
    0-60km/h in about 10s (downhill), Top speed - 100km/h (on a steeper downhill)
    Ground clearance : 125mm on 16-inch rims
    Tare : 134kg, GVM : 250kg (approx), GCM : 250kg (approx), Towing capacity : 0kg
    Best of all : 4L/100km, town driving and pinning it...

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  28. #59
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    Default Re: Portable Lithium Box

    Hi Rob, and of one thing I'm certain: there are a thousand ways to skin this cat. No one particular way is "The Way". In fact, your solution sounds like the preferred one if you'll only ever use the battery for outdoors stuff directly linked to your bakkie.

    Please do share photos! I can't get enough of all the solutions.

    My build had to cater for portability, serving both as a loadshed and an overland solution, and so has built-in shortcomings, as any compromise will (I'm still worried about my lack of any earth failsafe, for example). And I'm a woodworking hobbyist, as opposed to metal, and so plywood was an obvious choice. I suspect aluminium would be better?

    As for the battery, except for the peukert thingamabob and charge efficiency, mine is a standard lithium setting on both the victron ip65 and the bmv712.
    Leon Smith
    2020 Toyota Hilux XtraCab 2.8 4x4
    Fiat 500 0.9l turbo flattie

  29. #60
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    Default Re: Portable Lithium Box

    Great - thanks, Leon. I'm rushing off now, but will take and post some pics later this afternoon, or some time tomorrow.
    Rob Kirk

    Amarok V6.
    Sym 200 scooter 2 x 1, CVT transmission, 4V OHC, 11.4 kW, 15NM
    0-60km/h in about 10s (downhill), Top speed - 100km/h (on a steeper downhill)
    Ground clearance : 125mm on 16-inch rims
    Tare : 134kg, GVM : 250kg (approx), GCM : 250kg (approx), Towing capacity : 0kg
    Best of all : 4L/100km, town driving and pinning it...

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