Woo Hoo..New AGM Batteries

Sun was up but amps are low at that time of day, this time of year
As noted it was a 10 amp discharge with just a few lights and fridge
Before turning on the coffee maker

0.4 voltage sag on 85 amps is excellent--but was there any solar amps coming in to support that voltage? I saw the 0730 time, don't know when sunrise is there.

7:30 am
511 amp hrs, down 164 amp hrs
SOC 75.7%
10 amp load
12.49v

Turn on coffee maker
85.5 amps load
Voltage 12.11

Just posting observations

LY knows and posts battery stuff which I learn from. I will translate as needed now that he has kindly explained his terminology :)

3+1 does not equal 4
1+3 however does, somehow.

I'll keep using the 'Amps required to maintain voltage', As we are commanding our charging sources to seek and attain and hold A voltage until the batteries are full.

You can look at it however you need to

he's limiting amps and voltage.

if voltage is low more amps can flow if there are not enough amps then CC, if voltage has reached set pt , CV, the amps taper to maintain the voltage.

pianotuna wrote:
Nice Video LY. Thanks!

Yes that is what we see all the time when using our adjustable voltage chargers or different amp settings, but that guy is getting his cause and effect mixed up too. Doesn't matter I guess.

I like how he describes what my ugly graph shows--lower initial amps means higher SOC before reaching Vabs etc. which I got from reading Barre's book.

http://www.bestconverter.com/Books_c_67.html

EDIT--I watched that second video. The guy keeps saying that many amps are needed to maintain the voltage. Hogwash! It is the voltage that gets you the amps.

The charger has its set voltage. It gets that from the input 120v supply. The amps into the battery do not maintain that. They do raise the battery voltage up to the charger's voltage though. they don't maintain it there--the chemical reaction has taken place. all amps do now is make up for any self discharge. You could say that is amps holding the voltage, but that isn't what he was talking about the way I heard it.

He said the amps went up after he jacked up the voltage because more amps are needed to be at 14.2 than at 13.x. Wrong! The amps went up because the "pressure" (he did use that word) was higher--ie the voltage diff between the charger's v and the battery's v increased, so you got more amps.

What the guy didn't show when he raised the voltage and the amps went higher, is when the battery voltage then gets up to what the charger voltage is now, and amps are tapered again-- except now they might be sitting higher and creating heat because the battery is full.

Compass Marine/ Mainesail knows his stuff and can explain it well, and has the tools knowledge and experience to do so, well

Here is another video from him that might help convince the obtuse poultry on the other side ot the road, to admit, that it is indeed, themselves, who is on the other side of the road.

:)

https://www.youtube.com/watch?v=8_T1WhErEew&list=UUoPqTkOluQsuu3RpGnxVwFw&index=27

Nice Video LY. Thanks!

Two chickens stare at each other from opposite sides of the road.

One chicken yells to the other, how did you get to the other side of the road?

The other chicken yells 'it is you who are on the other side of the road! how did You, get there?