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Java's F450 RV

Just use a multimeter inline for the amp measurement. You won't need anywhere near the 10 amp capacity.
 
CDA 455 II said:
FWIW
So far everything you've described happens to be the same as what I went through with my parasitic battery draw issue.

The 30* and colder weather hastened the problem.
There was a 3-day period with 50* temps; started up.
Temps dipped/labored attempt to start; fail.
Click to expand...

It started right up yesterday, I started it at lunch as well, but no issues after sitting for 6 hours each time.

PAToyota said:
I went with more robust cable. I had always felt the OEM stuff was undersized.



At a casual glance, mine looked fine. But after replacing them, I cut one open at the end and there was corrosion an inch and a half or more back into the cable under the insulation.
Click to expand...

I will take a closer look at mine when I go poking around.
CarterKraft said:
Just use a multimeter inline for the amp measurement. You won't need anywhere near the 10 amp capacity.
Click to expand...
I will try this afternoon if its not snowing.


I left it unplugged last night also, its ~35 out today. We will see if it wants to start. Its kind of seeming intermittent Battery tester arrived as well.
 
Java230 said:
I will take a closer look at mine when I go poking around.
Click to expand...
You can test battery cables and charging cables by measuring resistance along the run. Don't have to disconnect them first either. Should be zero if the cable and connections are good.
 
GLTHFJ60 said:
You can test battery cables and charging cables by measuring resistance along the run. Don't have to disconnect them first either. Should be zero if the cable and connections are good.
Click to expand...
That's not a good test of current capability though.
If a volt meter is present a resistance check is of little use. Have your wife kid crank it over while you measure voltage drop of the cables connections etc.
 
This machine had a ground cable with .01 ohms of resistance but 4v drop when cranking.

jbWvUwLktWv7VDCNoRFvrpLA=w677-h902-s-no?authuser=0.jpg
 
CarterKraft said:
That's not a good test of current capability though.
If a volt meter is present a resistance check is of little use. Have your wife kid crank it over while you measure voltage drop of the cables connections etc.
Click to expand...

I'm not saying it's a be all end all test, but it can be useful if you suspect there's internal corrosion like PAToyota was saying.
 
Java230 said:
I will try this afternoon if its not snowing.


I left it unplugged last night also, its ~35 out today. We will see if it wants to start. Its kind of seeming intermittent Battery tester arrived as well.
Click to expand...
Be aware of capacitor charging though. I usually jumper the battery cable to the post then connect my meter in series, then disconnect the jumper from post to cable. That prevents you from charging caps through your meter fuse.
 
No start this afternoon.

After cranking Connected together and in truck this was the reading both sides. (one was 132 one was 133)

20230227_152118.jpg



Separated, not connected to anything this was the result.

20230227_153005.jpg
 
Java230 said:
No start this afternoon.

After cranking Connected together and in truck this was the reading both sides. (one was 132 one was 133)

20230227_152118.jpg



Separated, not connected to anything this was the result.

20230227_153005.jpg
Click to expand...
So batteries are completely dead 0%
:eek:

So it was on the tender or not?
Voltage resting 12.45 but battery is 100% bad is weird
 
And my meter must be out of batteries.... It's says 17.xx volts on the batteries?
 
CarterKraft said:
I don't think that's right. :lmao:
Click to expand...

Yeah... and its a 9v battery. Didn't have one and decided beer was good last night.

DT75FLH said:
What size or model trickle charger
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It charges off the main Victron (Multilplus 3kw, it is set for AGM though) house battery charger. Once voltage is more than 13 on the house bank the solenoid triggers and connects the house and start batteries.

But I think my house batteries are pissy too. Down to 11V this am. Been unplugged since Sunday PM.....
 
Java230 said:
Yeah... and its a 9v battery. Didn't have one and decided beer was good last night.


It charges off the main Victron (Multilplus 3kw, it is set for AGM though) house battery charger. Once voltage is more than 13 on the house bank the solenoid triggers and connects the house and start batteries.

But I think my house batteries are pissy too. Down to 11V this am. Been unplugged since Sunday PM.....
Click to expand...
What ever you are doing is not working out too great unless artic temps are super problematic.
Did you ever get the heating working for the house batts?
 
Java230 said:
Yeah... and its a 9v battery. Didn't have one and decided beer was good last night.


It charges off the main Victron (Multilplus 3kw, it is set for AGM though) house battery charger. Once voltage is more than 13 on the house bank the solenoid triggers and connects the house and start batteries.

But I think my house batteries are pissy too. Down to 11V this am. Been unplugged since Sunday PM.....
Click to expand...
So you are trickle charging the cranking batteries by connecting to the house with a AGM charge profile?
Is that smart?
 
CarterKraft said:
What ever you are doing is not working out too great unless artic temps are super problematic.
Did you ever get the heating working for the house batts?
Click to expand...
Heater and fridge were running.... Heat mat does work on the batteries. Comes on ~35

Charger is set to AGM profile.
 
CarterKraft said:
So you are trickle charging the cranking batteries by connecting to the house with a AGM charge profile?
Is that smart?
Click to expand...
Maybe not? But the AGM and flooded profiles are not that far off. Just a higher peak voltage when bulk charging.
 
Java230 said:
Maybe not? But the AGM and flooded profiles are not that far off. Just a higher peak voltage when bulk charging.
Click to expand...
But how does it direct the charge to the house or start batteries when paralleled? Path of least resistance?
The AGM's have a much lower resistance than flooded lead acid, so it might just overcharge the house batteries?
 
A $35 maintainer might be the better solution to maintain the starting batteries.
 
CarterKraft said:
But how does it direct the charge to the house or start batteries when paralleled? Path of least resistance?
The AGM's have a much lower resistance than flooded lead acid, so it might just overcharge the house batteries?
Click to expand...
The charger is at the house battery bank. Could be? I am not sure to be honest.

IIRC there is a starting battery output on the charger, I just didnt want to run another wire :homer:
 
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