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Search took 0.00 seconds. Search: Posts Made By: RossWilliams

Forum: Electrical | Charging, Systems, Solar and Generators

08-23-2019, 04:46 AM

Replies: 47

What a battery monitor may not tell you

Views: 9,043

Posted By RossWilliams

I think the point of the guy from the boat...

I think the point of the guy from the boat industry was that they aren't always reliable, its not obvious when they aren't and the damage to your batteries can be substantial when they are wrong....

Forum: Electrical | Charging, Systems, Solar and Generators

08-22-2019, 10:42 PM

Replies: 47

What a battery monitor may not tell you

Views: 9,043

Posted By RossWilliams

To summarize, what the battery monitor might not...

To summarize, what the battery monitor might not tell you is your batteries' state of charge.

Forum: Electrical | Charging, Systems, Solar and Generators

08-11-2019, 12:32 AM

Replies: 47

What a battery monitor may not tell you

Views: 9,043

Posted By RossWilliams

"The last info I found a few years ago showed...

"The last info I found a few years ago showed 11.9V or 12.1V was three lights on"

My SOC chart for AGM's puts 12 volts as 75% discharged. Our batteries have never dropped below 12V in the time we...

Forum: Electrical | Charging, Systems, Solar and Generators

08-10-2019, 10:13 PM

Replies: 47

What a battery monitor may not tell you

Views: 9,043

Posted By RossWilliams

Of course I do - four idiot lights over the door....

Of course I do - four idiot lights over the door. :) When four are on its either charging or fully charged, when it drops to three lights it is at about 75%, when it gets to 2 lights you are around...

Forum: Electrical | Charging, Systems, Solar and Generators

08-10-2019, 06:22 PM

Replies: 47

What a battery monitor may not tell you

Views: 9,043

Posted By RossWilliams

The AH rating from the manufacturer is new. You...

The AH rating from the manufacturer is new. You will need to adjust it downward as the battery ages. If you leave it at the manufactures rating you will soon be drawing it down further than you...

Forum: Electrical | Charging, Systems, Solar and Generators

08-07-2019, 04:49 AM

Replies: 47

What a battery monitor may not tell you

Views: 9,043

Posted By RossWilliams

Here is a quote from the article...

Here is a quote from the article (https://marinehowto.com/programming-a-battery-monitor/) after he describes several real life scenarios:

"There are many scenarios we can paint that can cause some...

Forum: Electrical | Charging, Systems, Solar and Generators

08-06-2019, 11:25 PM

Replies: 47

What a battery monitor may not tell you

Views: 9,043

Posted By RossWilliams

" He is a legend in the Marine Electrical world."...

" He is a legend in the Marine Electrical world."

I can see why. He not only seems to know what he is talking about from long experience, but he explains it clearly.

Forum: Electrical | Charging, Systems, Solar and Generators

08-06-2019, 11:23 PM

Replies: 47

What a battery monitor may not tell you

Views: 9,043

Posted By RossWilliams

The article linked above suggests even with that...

The article linked above suggests even with that reset process it is unreliable. He is talking abut a marine environment and some of what he has to say may be unique to that. But for those of us...

Forum: Electrical | Charging, Systems, Solar and Generators

08-06-2019, 04:52 PM

Replies: 47

What a battery monitor may not tell you

Views: 9,043

Posted By RossWilliams

Here is a quote from the link I posted above: ...

Here is a quote from the link I posted above:

"We have not yet seen an Ah counter’s SOC be within 10% of actual tested capacity and most are far worse than a 10% error. Is this the fault of the Ah...

Forum: Electrical | Charging, Systems, Solar and Generators

08-06-2019, 03:47 PM

Replies: 47

What a battery monitor may not tell you

Views: 9,043

Posted By RossWilliams

BMK

Here is a link to a very thorough discussion of using battery monitors (https://marinehowto.com/programming-a-battery-monitor/) in the context of marine batteries. It does not seem to address...

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