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Old 08-01-2020, 04:17 PM   #1
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Echo Charger - Voltage Discrepancy

Hi guys!

Just wondering if anyone has done an Echo Charger install? I picked on up the other day and installed it last night.

Red Wire to House +
Black Wire to house -
Red Wire w/white to Starting battery +

Indicator light is green but voltages look like this;

13.45v House
13.12v Starting Batts

I thought that if it was working properly they would both read the same voltage?
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Old 08-01-2020, 04:31 PM   #2
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Update: I thought I would kill the power at the pedestal, give it a few minutes, and then see what happens. When the power came back on the charging circuit went active on the inverter and the house batteries went up to 14+

I then measured the starting batts and they were also up at 14+ so it seems to be doing what it should. I just thought that both house and starting batts would equalize. Perhaps that's wrong.
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Old 08-01-2020, 05:06 PM   #3
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They would equalize, but it will take some time thru the echo charger wiring.

Did your start batteries discharge before your echo charger install ?
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Old 08-01-2020, 06:13 PM   #4
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They were a bit discharged. I just checked it again and the starting oes are a little lower then the house ones but they are both over 14v so I think you nailed it - it takes time and I probably shortcut the process by killing the power and re-starting it.
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Old 08-01-2020, 08:41 PM   #5
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They should level out at approx. 13.4 or 5 when on shore power with batteries charged without engine running. IMHO
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Old Yesterday, 01:31 PM   #6
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The best I'm seeing so far is

Coach 13.64
Starter 13.34

So it is working as I've been monitoring it. I wonder if the starter batteries will always be a bit lower due to the parasitic draw that is present on them?

Either way, it appears to be working as planned. Perhaps the Echo Charger will always be charging?
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Old Yesterday, 02:11 PM   #7
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In my experience with an Echo Charger the parasitic battery (in this case the start battery) will always be a slight bit lower than the primary.
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Old Yesterday, 04:59 PM   #8
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Good to know. Thank you for posting that. I was considering shutting off the start batteries to check for equalization but in my mind it defeats the purpose.
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