When we arrived at the camp site a couple of weeks ago I found the solar controller showing HVD which I had never seen before. Got the book out and it is High Voltage Disconnect. When I started the Pajero the DC to DC was outputting 16.1V.
Got around to having a look at it over the weekend. With the Pajero running at 1500rpm I took some measurements. The Pajero at the battery was 14.25V, the input to the DC to DC was showing 13.72V, and the output was 16.66V. The DC to DC was showing 10 amps to the house batteries.
Would appreciate some views on what is happening.
Aussie Paul.
-- Edited by aussie_paul on Monday 28th of October 2019 01:15:00 PM
First thoughts. 16v plus into your batteries will cook them, disconnect them from the dcdc until you work things out. Have you used it very long and is it wired correctly ? Have you set the battery chemistry profile and can you check how it is currently configured ? Except for dcdc, is anything else connected in between alternator and battery ? Your output voltage is too high.
aussie_paul said
02:13 PM Oct 28, 2019
Since my last post I have removed the DC to DC charger, and now showing at the battery 14.2 and is pumping 3.8 amps into batteries. No solar connected for all this testing. Before I fired up the Pajero the batteries were showing 13.09V. In my simple set up it appears to me I don't really need the DC to DC charger. Glad it was only a cheapie.
Comments?
Aussie Paul.
aussie_paul said
02:20 PM Oct 28, 2019
dabbler wrote:
First thoughts. 16v plus into your batteries will cook them, disconnect them from the dcdc until you work things out. Have you used it very long and is it wired correctly ? Have you set the battery chemistry profile and can you check how it is currently configured ? Except for dcdc, is anything else connected in between alternator and battery ? Your output voltage is too high.
Hi dabbler, it has been running as it should for a couple of years. I remember a trip of two ago that the batteries at 9pm were a little low and I was needing the CPAP so started the Pajero and it was pumping around 17 amps, which is what I would have expected.
Aussie Paul.
Peter_n_Margaret said
03:05 PM Oct 28, 2019
Where is the DC-DC charger in relation to the van batteries? Close by?
Is the DC-DC charger temperature compensated?
What was the battery temperature?
Cheers,
Peter
T1 Terry said
05:18 PM Oct 28, 2019
16vdc sounds like an equalisation charging voltage. Just check there isn't a dip switch set wrong and it has attempted to do a flooded cell battery equalise cycle
T1 Terry
T1 Terry said
05:22 PM Oct 28, 2019
aussie_paul wrote:
dabbler wrote:
First thoughts. 16v plus into your batteries will cook them, disconnect them from the dcdc until you work things out. Have you used it very long and is it wired correctly ? Have you set the battery chemistry profile and can you check how it is currently configured ? Except for dcdc, is anything else connected in between alternator and battery ? Your output voltage is too high.
Hi dabbler, it has been running as it should for a couple of years. I remember a trip of two ago that the batteries at 9pm were a little low and I was needing the CPAP so started the Pajero and it was pumping around 17 amps, which is what I would have expected.
Aussie Paul.
Was that with the DC to DC charger connected? Without the DC to DC charger the house battery would have been very low to get 17 amps to flow along that length of cable without the house battery voltage climbing to the point the alternator could no longer push that much current.
T1 Terry
aussie_paul said
05:27 PM Oct 28, 2019
Was that with the DC to DC charger connected? Without the DC to DC charger the house battery would have been very low to get 17 amps to flow along that length of cable without the house battery voltage climbing to the point the alternator could no longer push that much current.
T1 Terry
=============================================
Yes it was Terry.
Aussie Paul.
Dick0 said
06:26 PM Oct 28, 2019
aussie_paul wrote:
When we arrived at the camp site a couple of weeks ago I found the solar controller showing HVD which I had never seen before. Got the book out and it is High Voltage Disconnect. When I started the Pajero the DC to DC was outputting 16.1V.
Got around to having a look at it over the weekend. With the Pajero running at 1500rpm I took some measurements. The Pajero at the battery was 14.25V, the input to the DC to DC was showing 13.72V, and the output was 16.66V. The DC to DC was showing 10 amps to the house batteries.
Would appreciate some views on what is happening.
Aussie Paul.
If you are running a three way fridge on 12v and charge house batteries as you travel through a dc-dc charger...
Disconnect the solar charger and see what the readings are.
-- Edited by aussie_paul on Monday 28th of October 2019 01:15:00 PM
When we arrived at the camp site a couple of weeks ago I found the solar controller showing HVD which I had never seen before. Got the book out and it is High Voltage Disconnect. When I started the Pajero the DC to DC was outputting 16.1V.
Got around to having a look at it over the weekend. With the Pajero running at 1500rpm I took some measurements. The Pajero at the battery was 14.25V, the input to the DC to DC was showing 13.72V, and the output was 16.66V. The DC to DC was showing 10 amps to the house batteries.
Would appreciate some views on what is happening.
Aussie Paul.
-- Edited by aussie_paul on Monday 28th of October 2019 01:15:00 PM
Since my last post I have removed the DC to DC charger, and now showing at the battery 14.2 and is pumping 3.8 amps into batteries. No solar connected for all this testing. Before I fired up the Pajero the batteries were showing 13.09V. In my simple set up it appears to me I don't really need the DC to DC charger. Glad it was only a cheapie.
Comments?
Aussie Paul.
Hi dabbler, it has been running as it should for a couple of years. I remember a trip of two ago that the batteries at 9pm were a little low and I was needing the CPAP so started the Pajero and it was pumping around 17 amps, which is what I would have expected.
Aussie Paul.
Is the DC-DC charger temperature compensated?
What was the battery temperature?
Cheers,
Peter
T1 Terry
Was that with the DC to DC charger connected? Without the DC to DC charger the house battery would have been very low to get 17 amps to flow along that length of cable without the house battery voltage climbing to the point the alternator could no longer push that much current.
T1 Terry
Was that with the DC to DC charger connected? Without the DC to DC charger the house battery would have been very low to get 17 amps to flow along that length of cable without the house battery voltage climbing to the point the alternator could no longer push that much current.
T1 Terry
=============================================
Yes it was Terry.
Aussie Paul.