I have drawn up the original westy wiring, and two options I see as viable, however one is starting to appear as the better option.
One general issue, Air Co and converter charging should not happen simultaneously. Not sure an easy way to idiot-proof this, so might just need to be something one has to pay attention to and make sure both don't run at the same time to avoid overloading the converter.
Option 1: Switch near converter and re-use existing starter cables from relay.
Issues:
- Onemanvan reports significant voltage drop.
- Have to add a relay to prevent Air Co from running via Start Battery when alternator is not running. (see: https://groups.yahoo.com/neo/groups/sprinter_westfalia/conversations/messages/9958)
- Switch is in back of van, so a bit inconvenient.
Option 2: Run new wire from converter to house batteries.
Issues:
- Have to run a cable. Unsure how to best get cable from converter to house battery? Under van? Or through internal spaces?
One general question/issue also. When AC power is applied (either by generator or shore power), both the Westy AC-DC charger and the converter DC-DC charger could be applying power to the batteries at the same time. I don't think this is a problem, but maybe someone knows something I am missing.
So, based on the above, and the drawings, it seems the new cable is the better way to go. Eliminates some of the issues of running the AirCo when it should not be because of the dc-dc charger. And provides a switch (probably near existing switch) to change between alternator or converter for charging source. Because of the dc-dc charger, no "bad states" could occur (except simultaneous running of AirCo and charger). I do not think any additional diodes or other items would need to be installed.
Any additional feedback and comments is very welcome.
One general issue, Air Co and converter charging should not happen simultaneously. Not sure an easy way to idiot-proof this, so might just need to be something one has to pay attention to and make sure both don't run at the same time to avoid overloading the converter.
Option 1: Switch near converter and re-use existing starter cables from relay.
Issues:
- Onemanvan reports significant voltage drop.
- Have to add a relay to prevent Air Co from running via Start Battery when alternator is not running. (see: https://groups.yahoo.com/neo/groups/sprinter_westfalia/conversations/messages/9958)
- Switch is in back of van, so a bit inconvenient.
Option 2: Run new wire from converter to house batteries.
Issues:
- Have to run a cable. Unsure how to best get cable from converter to house battery? Under van? Or through internal spaces?
One general question/issue also. When AC power is applied (either by generator or shore power), both the Westy AC-DC charger and the converter DC-DC charger could be applying power to the batteries at the same time. I don't think this is a problem, but maybe someone knows something I am missing.
So, based on the above, and the drawings, it seems the new cable is the better way to go. Eliminates some of the issues of running the AirCo when it should not be because of the dc-dc charger. And provides a switch (probably near existing switch) to change between alternator or converter for charging source. Because of the dc-dc charger, no "bad states" could occur (except simultaneous running of AirCo and charger). I do not think any additional diodes or other items would need to be installed.
Any additional feedback and comments is very welcome.
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