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Thread: DT90-L322 Range Rover Dual Battery Kit

  1. #1
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    DT90-L322 Range Rover Dual Battery Kit

    Hi folks, I have just completed a dual battery installation video, for an L322 Range Rover kit.


    https://youtu.be/kFFt6C-0qZQ

    Hi folks, the DT90-L322 kit is now available in two versions, the standard version, as the kit has been for last 3 years, is now the DT90-L322-S, and a new larger kit, the DT90-L322-C, for charging house batteries in a camper trailer or caravan while you drive.

    Both kits have had a major software upgrade, adding a number of new features.

    One of the new features is Reverse Charging, which allows both batteries to be charged via the Anderson plug at the rear, ( DT90-L322-C version ) without having to open the bonnet. This is a big advantage if your cranking battery is flat, or if you want to keep the batteries topped up while your Range Rover is left unused for long periods of time.



    12/08/12 - The Standard DT90-L322-S Dual Battery Kit is now available for $299.

    The DT90 Isolator is actually 2 isolators in 1 unit.

    It has a 90 amp continuous rated cranking battery to auxiliary/house battery isolator with an additional 25 amp auxiliary/house battery to accessories output.

    The battery to battery circuit protects the cranking battery from being over discharged and the Accessories output protects the a auxiliary/house battery(s) from being over discharged.

    Because of the way the DT90 operates ( similar to the SC80 ) the isolator can be mounted under the bonnet for standard two engine bay mounted battery set ups.

    The DT90 can be fitted in the rear cargo area, next to an auxiliary battery mount in the rear of any vehicle, which is how the DT90-L322 Kit is set up.

    And the DT90 can be fitted in a CT or caravan next to the house batteries.

    The DT90-L322 Dual Battery Kit comes with all the cabling and wire cut to length, terminated and the large cable terminals have heat shrink fitted.

    The kit includes a pre-wired loom to allow you to rewire your rear power socket from the cranking battery to the isolator, meaning it will then safe to use with out the risk of flattening any of your batteries if you leave something plugged in, like a fridge, but forget it's running.

    Please Note, the DT90-L322-S is no longer supplied with the short leaded Anderson plug.

    This link will take you to the installation of the kit.

    Standard DT90-L322-S Installation

    29/08/15- The new Caravan version, the DT90-L322-C, will be supplied with a pre-assembled 6B&S ( 13.5mm2 ) twin lead, just over 2m long, and is $425, including postage.

    The new lead is pre-assembled and comes with an in-line 50 amp Circuit Breaker on one end and 50 amp Anderson Terminals installed on the other end.

    Like the Standard version, the Caravan version is a completely Plug-N-Play kit, and requires no wires to be cut and no holes to be drilled.

    The DT90-L322-C will take about 2 hours to fully install.
    Last edited by drivesafe; 18th October 2019 at 04:50 PM.

  2. #2
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    Hi folks and just an update, thanks to Camo.

    Camo had his DT90-L322 dual battery system installed yesterday and the installation allowed me to gather the last of the pictures needed to complete the full installation instructions, again, thanks goes to Camo for taking them while I carried out the installation.

    BTW, from the time Camo drove his RR into my workshop and turned the motor off, till the motor was started again to test the installation was just 35 minutes.

  3. #3
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    Hi drivesafe
    Thanks again for the great kit.
    Few months in and mine is working great.

    A few questions from an electrical dunce.

    1. Can the rear battery trickle charge the front?
    2. The rear 12v port is isolated. Will the over use of any others drain the front battery or both at once?
    3. In query 2, will the front battery go flat or is it protected by cutouts?

    Thanks
    Cbh25

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    Hi CBH25 and first off, I hate to announce this but I will be sending out a replacement unit to all those who have bought the kits up to and including Camo's.

    The kits you have at this time will protect the cranking battery at all times and as to your question 1, yes the kit allows and is now specifically designed to have the auxiliary battery discharge back into the cranking battery.

    This reverse charging is the main benefit for fitting a fast charging battery like an Optima as the auxiliary battery.

    As to question 2, this is where a problem has been found.

    The use of any device power from the rear power socket, when the socket is wired up to the kit, will allow some of the cranking battery's reserve power to be used while power devices from the rear socket.

    The new isolator is designed to isolate the cranking battery, leaving it with ample reserve to be able to start the motor, even in the worst conditions.

    The DT90 isolator is doing this but the isolator is also designed to protect the auxiliary battery from being over discharged, by cutting out the auxiliary battery at around 11.6v.

    This is where a problem has surfaced. During a program upgrade, I noticed that during some tests, the isolator did not isolate the auxiliary battery every time.

    I have now fixed the program error and will start shipping replacement units out, starting early next week.

    The replacement units will require about 5 to 10 minutes to charge them over for the original units and a return post satchel will be included with the upgrade.

    Sorry for any inconvenience this will cause and while the potential problem will most likely not effect any one with the existing kits, I am not prepared to take that chance and prefer to replace them.

    The replacement units also have some new operating procedures that may be of benefit to you.

    The program change is designed to allow for the automatic control of 3 way fridges being used in a camper trailer or caravan being towed by your RR.

    Again, sorry for the inconvenience and expect a parcel in the mail over the next few weeks.
    Last edited by p38arover; 23rd December 2015 at 06:04 PM. Reason: change ?€™ to '

  5. #5
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    Hi Drivesafe, I have finally installed mine ready for the long weekend down here - very easy to install and it is up and running fine. Just noticed your post and I'm wondering if I should switch mine to isolated mode for the weekend to be on the safe side? The batteries in mine run the fridge on their own for 2 to 3 days so I don't really need the extra capacity the cranking battery brings to the party if there is a chance of it staying connected as the batteries drop down.

    OR - how can I tell if the cranking battery stays connected? I am assuming the led will be green followed by the red flashes when the cranking battery is connected, and just the red flashes when the cranking battery is disconnected. I noticed that when switched to isolated mode that you just get the red flashes.

    Hope that all made sense?

    Cheers - Gav
    If you need to contact me please email homestarrunnerau@gmail.com - thanks - Gav.

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    Hi Gav and if the problem does occur, it's not going to effect you cranking battery but you could end up flattening your auxiliary battery.

    Because of the way the fault occurs, you are actually better off leaving the isolator in the SHEARED mode, so there is less chance of flattening the auxiliary battery.
    Last edited by p38arover; 23rd December 2015 at 06:04 PM. Reason: change ?€™ to '

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    Chasing up order

    Hi guys,
    placed an order for a kit before Christmas. Got the battery from Canberra two days later. So wondering if its lost?
    Tony
    Quote Originally Posted by drivesafe View Post
    The new DT90-L322 Dual Battery Kit is now available for $299.

    The DT90 Isolator is actually 2 isolators in 1 unit.

    It has a 90 amp continuous rated cranking battery to auxiliary/house battery isolator with an additional 25 amp auxiliary/house battery to accessories output.

    The battery to battery circuit protects the cranking battery from being over discharged and the Accessories output protects the a auxiliary/house battery(s) from being over discharged.

    Because of the way the DT90 operates ( similar to the SC80 ) the isolator can be mounted under the bonnet for standard two engine bay mounted battery set ups.

    The DT90 can be fitted in the rear cargo area, next to an auxiliary battery mount in the rear of any vehicle, which is how the DT90-L322 Kit is set up.

    And the DT90 can be fitted in a CT or caravan next to the house batteries.

    The DT90-L322 Dual Battery Kit comes with all the cabling and wire cut to length, terminated and the large cable terminals have heat shrink fitted.

    The kit also comes with an 50 amp Anderson plug with a short loom so you can source high current power from the rear battery if required, for things like air compressors or large inverters and so on.

    The kit includes a pre-wired loom to allow you to rewire your rear power socket from the cranking battery to the isolator, meaning it will then safe to use with out the risk of flattening any of your batteries if you leave something plugged in, like a fridge, but forget it's running.

    This link will take you to the installation of the kit.

    http://www.aulro.com/afvb/showthread...52#post1737352
    Last edited by p38arover; 23rd December 2015 at 06:05 PM. Reason: change ?€™ to '

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    Hi Drivesafe
    Ive tried to contact you via PM, but you dont seem to be receiving them.

    I haven't recieved my replacement unit yet, can you please let me know when it will arrive so I can replace mine.

    Thanks
    Craig

    Also while I have you, I'm looking for the description of the flashing LED on the kit - I cant remember what is good and what is bad flashes.

  10. #10
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    Hi folks, just letting you know the new DT90-L322 dual Battery kits are finally available.

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