- Thread starter
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There's a (relatively) easy fix though as others and myself too have already done the conversion to 24v headlights. I have brighter headlights, a much simplified system with less relays and no centre tap.
Best battery charger for 24v dual battery systems
- Thread starter markthemenace
- Start date
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mulebarn
GOLD Star
Reviving this ancient thread. I have a HZJ73 with 24V, and a NOCO 12/24 maintainer/charger. Could someone explain which batteries and posts I’m supposed to hook it up to, and why? Thanks in advance.
mulebarn
GOLD Star
I *think* this is accurate, where the ground is the battery closest to the firewall? Hoping someone can confirm. Thanks.
Old thread revival.
This is on Prime Day (turn off you add blocker):
Amazon product ASIN B08G3STB1N
With the NOCO 12v x2 charges you hook up a pair of leads to each of the two 12v batteries +/- and +/- one on each. They have a processor to allow this. I have not tried this with the Battery Tender I am currently using.
This is on Prime Day (turn off you add blocker):
Amazon product ASIN B08G3STB1N
With the NOCO 12v x2 charges you hook up a pair of leads to each of the two 12v batteries +/- and +/- one on each. They have a processor to allow this. I have not tried this with the Battery Tender I am currently using.
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This is my setup but I found that disconnecting the terminals from the truck works a lot better when using two smart chargers like this one so that they are completely isolated and not tripping each others up. I use the quick disconnect switches on my two batteries.
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I have the Genius as well. Made a little bracket for it and put it by brake booster on my LHD Bj73. After a few months, no issues at all.
Nice. Do you leave your batteries hooked together? Just curious. I understand it is not necessary to unhook them.
I finally remembers to test my X2 Battery Tender to see if it acted okay leaving the batteries hooked together.
Also - I mentioned somewhere I was going to try to use my dual lead 12v Battery Tender on the BJ73 with the batteries still hooked up in series.
The Tender appeared to be working but it got hotter than I have noticed before so (out of caution) I disconnected the cable between the batteries as I normally do and it almost immediately indicated charged and cooled down. I do not think the Battery Tender brand has the same smart tech as the Noco.
The Tender appeared to be working but it got hotter than I have noticed before so (out of caution) I disconnected the cable between the batteries as I normally do and it almost immediately indicated charged and cooled down. I do not think the Battery Tender brand has the same smart tech as the Noco.
Interesting. I had a battery tender brand for years attached to my 40 and it would get hot from time to time. I read that the metal case of the battery tender is also not recommended for 24v because it used the case as a ground. I leave the batteries connected up and just attached the charger connections to their posts. I read somewhere it isolates them inside its circuits but I could be wrong.
My Tender has a plastic case.
I will probably spring for the noco before primeday is over
FWIW I've used a Noco 7200 to charge my 74's 2 batteries in 24v, and also used a Noco 4 bank wall charger to maintain each battery separately @ 12v ea (without unhooking anything). No problems.
My HDJ81 has one of those Noco 2 bank chargers mounted under the hood and it works well.
My HDJ81 has one of those Noco 2 bank chargers mounted under the hood and it works well.
I just pulled the trigger on a Noco 5x2 on Amazon with the intention of mounting it in the Bj73. It may be a few bucks off for Prime Day.
From here: NOCO - Series And Parallel Charging - Support - https://no.co/support/series-and-parallel-charging
With that in mind, the Noco 5x2 is rated at 120Ah and the 10x10 is rated at 230Ah.
So check the size of your two batteries and buy accordingly.
With that in mind, the Noco 5x2 is rated at 120Ah and the 10x10 is rated at 230Ah.
So check the size of your two batteries and buy accordingly.
That's is good info but the BJ73 is hooked up in series not parallel so 120Ah is just fine.
Gonna cross post this from another charger thread:
My Noco Genius Gen5x2 just died. Started blowing both fuses on one bank. Did a bunch of testing and it is indeed the charger and not something in the truck. And to boot, I did not realize it so it messed up one of my batteries. I was running Group 25 Duralast Golds and they were fine until this. AutoZone warranteed both as the incident swapped polarity in the battery that the charger died on. AutoZone no longer sells the gold in Group 25 so they gave me two regulars. Not too pleased with that but at least I did not have to drop $400 on two batteries.
I was running the Noco in the engine bay so I just had to plug in the 120v.
I am have not decided if I will stick with Gen5x2 or go with the Minix2
My Noco Genius Gen5x2 just died. Started blowing both fuses on one bank. Did a bunch of testing and it is indeed the charger and not something in the truck. And to boot, I did not realize it so it messed up one of my batteries. I was running Group 25 Duralast Golds and they were fine until this. AutoZone warranteed both as the incident swapped polarity in the battery that the charger died on. AutoZone no longer sells the gold in Group 25 so they gave me two regulars. Not too pleased with that but at least I did not have to drop $400 on two batteries.
I was running the Noco in the engine bay so I just had to plug in the 120v.
I am have not decided if I will stick with Gen5x2 or go with the Minix2
I've been using Victron chargers installed in both my 80 and BJ74 as the Victron can be used to charge the batteries and run a cycling load (fridge). Many chargers can not do this and I've had the NOCO shut down.
I do have and have used a two bank Noco as well as single bank NOCO that can be used for 12v and 24v. I think a vehicle mounted two bank is a good way to go, ensuring each battery gets what it needs and any imbalance is minimized. But for my use as a vehicle mounted charger I want the ability to have the fridge on and batteries being charged. I wish the NOCO could that and perhaps at some point they will; Without a cycling load no worries.
I'll be checking the batteries regularly and look at doing the battery swap once a year if needed, or put the two bank charger on it once in a while to address potential imbalance.
hth's
gb
I do have and have used a two bank Noco as well as single bank NOCO that can be used for 12v and 24v. I think a vehicle mounted two bank is a good way to go, ensuring each battery gets what it needs and any imbalance is minimized. But for my use as a vehicle mounted charger I want the ability to have the fridge on and batteries being charged. I wish the NOCO could that and perhaps at some point they will; Without a cycling load no worries.
I'll be checking the batteries regularly and look at doing the battery swap once a year if needed, or put the two bank charger on it once in a while to address potential imbalance.
hth's
gb
The NOCO are battery chargers, not power supplies. They are only meant to charge and maintain batteries. The Victron has both chargers/power supplies and inverters. It’s like comparing apples to oranges. Also, note the cost differences. Those oranges are about 5-10 times the cost!
Hi @LDRF
The link to Victron in my post is for Victron Bluesmart IP65 battery chargers. They typically are a touch more expensive then NOCO, though sale pricing can narrow that. But the Victron Bluesmart IP65 battery chargers are not 5-10 times more when comparing like to like.
I still like the NOCO, own and use them when needed. However for my truck mounted use, Victron works better. If you don't have or anticipate a cycling load like a fridge while the charger is in use, NOCO would work fine.
gb
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@Greg_B
I see. I was looking at their Skylla-IP65 which actually has a dedicated supply. I didn’t see the Bluesmart. An interesting option. It does say it can be used as a Power Supply. I especially like the Bluetooth for monitoring. For charging/maintaining two 12v batteries, you would want two, to maintain the batteries as separate units.
And, yes,
!!! 
I see. I was looking at their Skylla-IP65 which actually has a dedicated supply. I didn’t see the Bluesmart. An interesting option. It does say it can be used as a Power Supply. I especially like the Bluetooth for monitoring. For charging/maintaining two 12v batteries, you would want two, to maintain the batteries as separate units.
And, yes,
!!! 
