Interesting behavior - Firefly batteries, Balmar Smartgauge, small solar panel

[phantomracer]

Originally Posted by john61ct

Firefly is Carbon Foam, long after Gibbo designed SG.

Either Bruce or Maine Sail stated #3 AGM is the correct setting, but its degree of accuracy is not well tested yet.

Yes I called Balmar and MaineSail to confirm it is #3, I believe they have updated their manual recently

[Caribdis]

Data Point: the SG200 does have a 'Carbon Foam' battery type listed as an option for battery configuration.

Originally Posted by phantomracer

Yes I called Balmar and MaineSail to confirm it is #3, I believe they have updated their manual recently

[phantomracer]

Originally Posted by Caribdis

Data Point: the SG200 does have a 'Carbon Foam' battery type listed as an option for battery configuration.

I have the original smartgauge.. but good to know.

[kenbo]

Originally Posted by phantomracer

Hehe.. that's how i describe it to others too. It just works .. by magic [emoji1]

Since it is propietory, its the only way to describe it.

It's not magic, if you really want to know the principle of the SG it's found in the inventor's master's thesis

[john61ct]

Link please?

[phantomracer]

Originally Posted by kenbo

It's not magic, if you really want to know the principle of the SG it's found in the inventor's master's thesis

I am sure. I just don't know how to explain it in 2 sentences to someone who comes on the boat and asks what that is! I just want to ensure it works and is accurate, which it seems to be!

[kenbo]

Originally Posted by john61ct

Link please?

John,

How are your calculus skills? I'll try to find it, I read it about 5 plus years ago and read is a stretch!

[john61ct]

Well don't go to too much trouble then, but would be nice to have as a reference.

[kenbo]

Originally Posted by john61ct

Well don't go to too much trouble then, but would be nice to have as a reference.

I can't find Gibby's off hand but while looking through my hard drive I did come across this thesis. I'm sure it'll pop up when I'm not actively looking.

[john61ct]

Ah yes, good old "electrochemical impedance spectroscopy", rings a loud bell that. 8-)

Anyone have access to a PDF of:

S. Piller, M. Perrin, A. Jossen, "Methods for state-of-charge determination and their applications", Journal of Power Sources, Vol. 96, Issue: 1, June 1, 2001. pp. 113-120

?

[john61ct]

The Balmar term for that side* of the SG200's operation is

"active impedance compensation"

*as opposed to the coulomb counting totalizing