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Isolator Eliminator Cross Charge Regulator

PostPosted: Mon Sep 07, 2009 6:05 am
by GaryO
I have this on my sailboat and my start battery is drawing down with the house batteries under load. The Green Error LED blinks at a constant rate. I am using a SunSaver solar charger in the circuit. Does anyone have the troubleshooting guide and is there a diagnostic procedure I can follow?

Re: Isolator Eliminator Cross Charge Regulator

PostPosted: Tue Sep 08, 2009 10:34 am
by Coulomb
The meaning of the green LED changed at some point in the history of the unit, but it generally means the processor is working.

You can always measure the starter battery voltage to see whether the Eliminator is actually charging it.

Re: Isolator Eliminator Cross Charge Regulator

PostPosted: Tue Sep 08, 2009 4:04 pm
by GaryO
With the engine running the starter battery only charges when the house battery reaches full charge. When the boat is using battery power, it appear the start batter gets drawn down with the house battery I have 2 8AGM 225A house batteries independent of my deep cell marine start battery. Since I have the solar panel constantly charging the system and only use the engine going in anbd out of harbors, there is very little load or use on the start battery nad it should maintain full charge at all times If my house batteries go down to 80% the start battery is at 60%

Re: Isolator Eliminator Cross Charge Regulator

PostPosted: Thu Sep 10, 2009 2:22 pm
by Coulomb
With the engine running and the house bank charging, measure the voltages on all the pins of the Eliminator, relative to ground. Post the results.
Thanks.

Re: Isolator Eliminator Cross Charge Regulator

PostPosted: Sat Sep 19, 2009 4:55 pm
by Leonard Nero
The red charge/sense wire from the start battery back feeds through the Eliminator with 8 volts to the power distribution lug. Suggestions?

Re: Isolator Eliminator Cross Charge Regulator

PostPosted: Mon Sep 21, 2009 6:59 am
by GaryO
The attached spreadsheet has the pin readings. I have a small solar panel in the systems. The first set are all battery switches off - no load with Solar charger. Under Load, and then with Engine. MY alternator puts out steady 14.14V. Pin 2-9 was fluctuating between 11-8-5-0V
Alternator Voltage with Engine 14.14

TB-1
Pin Solar No Load Batt On Full Load Engine On
1 12.68 12.58 13.96
2 12.68 12.58 14.14
3 0.002 0.11 0.007
4 0.002 0.11 0.006
5 0.002 0.009 0.005
6 0 0 0.001
7 12.7 12.5 14.1
8 12.7 12.5 14.1
9 2.965 2.97 2.97
10 0.002 0.004 0.003

TB-2
Pin Solar No Load Batt On Full Load Engine On
1 12.99 12.98 13.46
2 0.002 0.012 0.005
3 0.002 0.012 0.005
4 4.565 4.565 4.567
5 0.002 0.012 0.005
6 4.57 4.569 4.572
7 12.99 12.98 13.48
8 0 0 0
9 11/6/0 10/8/0 12.6/8.5/5
10 0 0 0

Re: Isolator Eliminator Cross Charge Regulator

PostPosted: Wed Sep 23, 2009 10:35 am
by Coulomb
The unit is working. The input is on 1-2, and the output is on 2-1, and shows as high as 13.46, indicating that charge is being delivered to the starter battery.

Re: Isolator Eliminator Cross Charge Regulator

PostPosted: Wed Sep 23, 2009 10:43 am
by GaryO
The problem is that when the house batteries are under load, ie refrigeration, lights, electronics The Start battery is not being isolated under house load and is being drawn down with the house batteries compromising it's effectiveness to start the engine. It then takes longer to charge as it is only being trickle charged by the eliminator.