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Dual battery setup for 2.8 1GD
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Originally posted by LeighW View PostI had discussions with them a few months back, they didn't recommend the charger for use with Lithiums, I went for the Enerdrive for that reason.
I'm currently running a Projecta IDC 25 in my camper to my 100 AHr lithium and works fine - It has a simple 3 stage charging algorithm (CC, CV and float) I used the Gel 14.1V setting, and so far has worked a treat.
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The 12V would have been an issue, my Lithiums are around 12.9V with 20% SOC.
The other issue is Lithiums don't like being float charged once they are fully charged, float charging them will shorten their life.
The advantage of chargers like the Enerdrive DC2DC units are you can set the charge rate, the maxium charge voltage and the charging current to switch off at. Once the terminal voltage reaches the target voltage and the current drops to the target value the charging stops and it goes into power supply mode. You can set the voltage output in power supply mode between 13.0V-13.8 (0.1V Step) ie you can set it to a voltage slightly below the terminal voltage of your fully charged Lithium battery so that it supplies any accessory loads but doesn't charge the battery. When the battery terminal voltage drops to 13.2V or the charger is turned off and on again it will resume charging.HKB Electronics, manufacturer of the Alternator Voltage Booster, Silver 2008 D4D,Lifted,Underbody protection, Alternator Voltage Booster, Tiger Z winch, Lightforce DL, Air Horns, Tanami Drawers, Drop down fridge slide, Outback cargo barriers, Rotronics dual Battery system, Polaris GPS, HF/UHF/VHF, Radio speaker combiner, Long ranger water tank, Diff breathers, Inverter, Snorkel and others
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For those playing at home, the dash display says its currently 40c here in Adelaide and Weatherzone says 37.7c - after around an hour behind the wheel in city traffic I curiously checked the alternator output at the main battery terminals.
13.62v (fluctuated from 13.60 to 13.65 with a/c cycling).
Potentially, it may be able to drop to 13.5v but I'm still seeing 13.65 - 13.95 in all but the extreme weather days.
Starting to wonder if the 5A / 15A output referred to in the manual may be related to the sensitivity to temperature compensation...Cheers
Micheal.
2008 GXL D4D Auto. GOING... GOING... GONE
2015 GXL 1GD Auto. And it begins again...
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I've spent many hours over the past couple of weeks reviewing dual battery options. I'm no closer to knowing the best way to go as I have half a dozen variable components that do or don't go well together in different situations. So perhaps out of frustration/confusion/laziness I'm going to ask directly:
What should I get?
Car: 2017 Prado GXL (2.8 Diesel)
Usage:
monthly short overnight trips (no power)
Quarterly long trips 1 - 2wks (predominantly no power)
Accessories: Waeco CFX65 (permanently mounted and gets used weekly)
Led lighting
Other occasional plug and play 12v accessories
Presently, I run from a removable battery box in the boot which I charge via ctek when home or solar when away.
I want to mount in the bonnet, run cable to rear for fridge (dedicated connection), a couple of extra accessory plugs and an anderson plug to tow bar. Considering an Anderson plug somewhere for a solar panel too (will buy a new panel as I'm giving my old one to my son).
So if anyone would be kind enough to dictate terms to me; I'd appreciate it! Don't worry about options, just tell me in your experience what you feel is the best set up. From battery mount, dcdc etc or anything else I need. Brands models...ill take your advice!
I've wired a dual battery before in the past which worked fine, but I care a lot more about the Prado than I did the old car so I want to get as close to best as possible. Thanks in advance!
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Hi KentyScotchy
Your budget, style of camping and amount of off-road may be different to mine but I have similar needs, I went for a deep cycle battery under the bonnet connected to the alternator via a RedArc isolator. This runs to a cig lighter in the back to power my 35l fridge, USB sockets in the rear seats for the kids and it also runs through to an Anderson plug on the rear to send charge through to my camper (which has an onboard battery that is charged through a DC charger).
The second battery under the bonnet easily runs the fridge for a couple of days, I could charge it with my solar panels but have never needed to as I rarely wouldnt drive the car at least a short distance every couple of days when camping and this seems to keep it topped up enough.
In your shoes I would get an under-bonnet battery which would be hassle free for your weekly use. Don’t bother with an after-market mount unless you do a lot of rough driving. Be careful to get a battery that is warranted for under-bonnet use, as some AGM batteries aren’t (mine is an SSB 130Ah AGM which has a 3 yr warranty which covers under-bonnet use). I would not get a DC charger for an under-bonnet second battery, but think they’re a must for remote batteries (such as a battery in a camper trailer) due to the voltage drop over the distance from the alternator. Don’t get a cigarette socket installed for the fridge (as I did), the lead constantly falls out on the road; get a Merit or Anderson plug instead.
Hope this helps ... good luck!
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Thanks mate that does sound exactly in line with my needs. Budgets no issue as I'm happy to pay for what's necessary to get a quality setup. That being said I don't like to throw away money on things I don't need.
I only do the rough driving with the boys (wife tends to panic) but I have had a few tales of misadventure getting lost in some pretty ordinary mountain ranges (could be reason why the wife panics) so I'll go for the aftermarket mount as a better to be safe than sorry option. I'd be interested to see photos of your install, especially where you mounted the sockets for the kids if you have any to share?
Also does anyone have a cheat sheet re lifting sills, running cables Etc to make my life a little easier?
I'll put a list of items up in line with this install and seek some feedback on quality/reliability. I've used no name eBay isolator a in the past without incident, but looking at something like the redarc sbi12 this time. I have t started looking at an mppt yet as I may source a panel with one attached. Happy to hear the opinions of others...thick skin, looking to learn from others experiences. I have no locked in preconceived preferences. Thanks again
Kenty
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I got a sparky to install the dual battery with a RedArc SBI isolator (which has never missed a beat). This runs through the passenger side sill to an Anderson at the back and across to a cig socket in the rear cargo area.
I ran a couple of additional links from the dual battery through the passenger side firewall ... one is for a future CB install, the other runs down the passenger side sill to USB sockets and a voltage meter attached to the base of the passenger seat ... I was originally going to attach to the console but got too nervous about drilling.
Piccy attached (it’s upside down).
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Originally posted by KentyScotchy View PostI've spent many hours over the past couple of weeks reviewing dual battery options. I'm no closer to knowing the best way to go as I have half a dozen variable components that do or don't go well together in different situations. So perhaps out of frustration/confusion/laziness I'm going to ask directly:
What should I get?
Car: 2017 Prado GXL (2.8 Diesel)
Usage:
monthly short overnight trips (no power)
Quarterly long trips 1 - 2wks (predominantly no power)
Accessories: Waeco CFX65 (permanently mounted and gets used weekly)
Led lighting
Other occasional plug and play 12v accessories
Presently, I run from a removable battery box in the boot which I charge via ctek when home or solar when away.
I want to mount in the bonnet, run cable to rear for fridge (dedicated connection), a couple of extra accessory plugs and an anderson plug to tow bar. Considering an Anderson plug somewhere for a solar panel too (will buy a new panel as I'm giving my old one to my son).
So if anyone would be kind enough to dictate terms to me; I'd appreciate it! Don't worry about options, just tell me in your experience what you feel is the best set up. From battery mount, dcdc etc or anything else I need. Brands models...ill take your advice!
I've wired a dual battery before in the past which worked fine, but I care a lot more about the Prado than I did the old car so I want to get as close to best as possible. Thanks in advance!
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Hi All,
after 5 years of indecision I finally bit the bullet and got myself a Prado. 2015 2.8l gxl. Time for the mods.
One of of the first things I want is a dual battery system to run a 65l fridge while camping.
I have read read and reread this thread to get a feeling for if I should use a vsr or dcdc. I think I will go with the VSR but the one thing I can't get clear in my head is do I need to change the alt fuse, or will the standard set up do the job.
thanks,
Josh
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The 2.8 cannot use the diode as far as I am aware.My 150 build - http://www.pradopoint.com/showthread.php?27423-A-Random-approach-to-a-Bluestorm-150-GXL-D4D-automatic
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The 2.8 has a temperature compensation alternator.
According to Optima, my Yellow Top needs between 13.65v - 15.0v via an alternator and I regularly see 13.65 - 14.0v so I certainly dont need a DCDC.
Josh P H - I'd suggest you check your specific Prado before heading out and spending the money on a DCDC.Cheers
Micheal.
2008 GXL D4D Auto. GOING... GOING... GONE
2015 GXL 1GD Auto. And it begins again...
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