Originally posted by drivesafe
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Originally posted by mullerwh View PostWhat do you mean by sharing charge? I have a yellowtop with a vsr and mine sits at 12.6 resting voltage. The optima spec for yellow top says it should be 13.1v - cannot recall ever seeing that
Originally posted by rpn View PostIt would be interesting to do some tests but the 2.8 manual states that the charging system operates at either at 5A or 15A max in quick charge mode.Cheers
Micheal.
2008 GXL D4D Auto. GOING... GOING... GONE
2015 GXL 1GD Auto. And it begins again...
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Originally posted by 120D4D View PostI wondered about that comment in the book too.
It's interesting that it claims to have two speeds though (5A and 15A). I wonder if that's related to the different charging voltages some of us see.
Originally posted by 120D4D View PostI have done some tests at home and can say that my prado charges the aux batt MUCH higher than 15A. It smashes my 20amp DCDC...
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The charging system in the 2.8Ltr uses an ECU controlled alternator as you are aware, this alternator is indeed connected to the engine ECU. On referring to the maintenance manual it also refers to error codes available from the engine ECU for fault rectification.
However, the alternator behaves the same as the earlier models, I would hazard a guess and say that although the alternator is connected to the engine ECU and could be controlled by it this does not seem to be the case. The alternator also has a fall back mode whereby it will default to regular charging if it looses communications with the ECU. It appears to me as there is no current sensor that Toyota have made provision for ECU control but in at least the Australian version are not as yet using it.Last edited by LeighW; 26-11-2017, 01:08 PM.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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Originally posted by drivesafe View Post
On the other hand, DC/DC device are renowned for over charging batteries, particularly when fridge is being powered from the battery being charge by a DC/DC device.
From the DC-DC specs;
Charge Type 3 Stage Bulk *20A at 9-11Vdc, 25A at 11-32Vdc *Constant Current up to:
GEL AGM WET CALCIUM
14.1V 14.4V 14.7V 15.4V
Absorption Constant Voltage until current drop to 3.8A
GEL AGM WET CALCIUM
14.1V 14.4V 14.7V 15.4V
Float Keep Constant Voltage at 13.7V
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Generally it will take less than an amp for the charger to revert to bulk charging, it will vary depending on the manufacturer.Last edited by LeighW; 27-11-2017, 03:00 PM.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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Originally posted by LeighW View PostGenerally it will take less than an amp for the charger to revert to bulk charging, it will vary depending on the manufacturer.
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Seems Redarc have made some changes since I last looked at their manuals, I generally steer clear of their gear these days so not up to date it seems:
From the 25A charger manual:
"Float stage maintains 13.3V on the output battery, keeping the battery topped up.
This counteracts the battery's self discharging or loads applied to the battery."
From the above it appears their charger will only revert to boost charging after the battery terminal voltage falls below 13.3V.
Most of the low end chargers simply revert to bulk charge as soon as any load is applied unless they have a "supply" setting. Some higher spec chargers allow you to specify when the charger will return to charge mode.
"The camping battery stays at 13.2V no matter how hard I load it up." As long as you draw less than the charger can supply that is.Last edited by LeighW; 27-11-2017, 08:10 PM.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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Originally posted by LeighW View Post"The camping battery stays at 13.2V no matter how hard I load it up." As long as you draw less than the charger can supply that is.
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It's ok, a 7A kettle will take 91.7 days to boil 1L of water.My 150 build - http://www.pradopoint.com/showthread.php?27423-A-Random-approach-to-a-Bluestorm-150-GXL-D4D-automatic
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Originally posted by mjrandom View PostIt's ok, a 7A kettle will take 91.7 days to boil 1L of water.
I think the physics says it should take about 24 mins to heat it from 25C to 100C.Last edited by dBC; 28-11-2017, 04:11 PM.
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28 mins at 100% efficiency but who is counting?My 150 build - http://www.pradopoint.com/showthread.php?27423-A-Random-approach-to-a-Bluestorm-150-GXL-D4D-automatic
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Originally posted by mjrandom View Post28 mins at 100% efficiency but who is counting?Last edited by dBC; 28-11-2017, 06:51 PM.
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