Classic 150 Statistics Glitch/Anomaly

[Garret]

Doesn't matter what I did or did not see, or that I may not have been looking when what may not of happened happened.  Look at my post that shows the recorded data.  Even if I did not observe the event that caused the zeroing of the kWh meter and 5% increase in SOC instantaneously (but I did) on the Local Status App., the data record clearly shows this anomaly. Just want to get to the bottom of what may have happened. 

[Vic]

WOW !!  Garret,

Did not mean to Spool-Up anyone.

If you re-read my post,  not even very carefully,  it should be obvious that I was making no disbelieving comment.   I DO believe that what you saw and recorded did happen.   And posted nothing to the contrary.

In re-reading my post,  you should find that what I was saying is that the accuracy/repeatability of SOC measurements is probably less than the SOC jump that you noted,  especially on FLA batteries.

The Classic is a complex,  advanced product,  and like most things,  it is not yet quite perfect.

FWIW,  Have Fun with the new system.     Your Friend,   Vic

[boB]

Doesn't matter what I did or did not see, or that I may not have been looking when what may not of happened happened.  Look at my post that shows the recorded data.  Even if I did not observe the event that caused the zeroing of the kWh meter and 5% increase in SOC instantaneously (but I did) on the Local Status App., the data record clearly shows this anomaly. Just want to get to the bottom of what may have happened.

I magnified the charts so I could read the values better.

Could you please look at the SOC% for the previous hour and 1/2 ?

I am wondering if maybe your SOC% was sitting at the higher percentage somewhere up to
90 minutes before the apparent reset.  If so, then that would explain the jump after reset.

Also, what is going on with the FET temperature being negative at the beginning of the chart ?

boB

[boB]

Have my Efficiency set to 70 %. 

Vic, unless your batteries are almost toast, I don't understand why you have
your Amp-Hour efficiency so low ?  That is, unless you REALLY want to make
sure that you have put more than enough A-H back in.

boB

[Halfcrazy]

Garret
it is pretty clear from those logs that the classic did reset, When it did it took a "Jump" in SOC % for some reason? I cant give you a reason why but I will play around here and try to recreate it. Ideally we would find the reason they reset and fix the root issue. Maybe it is the networking code and Andrews new release will fix it. This has always been a suspicion of mine that its some how connected to the Ethernet?

Ryan

[Halfcrazy]

I just forced mine to reboot by viewing the logs. The SOC stayed the same. I will try my other two when I get out shoveling snow. Luckily its real easy to crash the classic so I can play around and see if I can recreate this jump in SOC

[Garret]

Also, what is going on with the FET temperature being negative at the beginning of the chart ?

It was perhaps the coldest morning (-24 F) I have witnessed in 50 years in our area.  My System is installed in a completely weather tight, but unheated barn.  I'm surprised the recorded temps weren't even lower.  Must be that it is somewhat warmer inside the barn.  At the time of the reset, temps were about single digits.  Classic had no problems with these temps in the past.  Not saying very low temperatures not a contributing factor, though.  I am somewhat concerned about the in-elasticity of cabling in these temps, especially the Ethernet cable running to the WiFi bridge and the possible strain it could inflict on the PCB.  Just throwing that out there.

[Garret]

Sorry Vic,
I tend to become defensive at times, because I am sensitized having to deal with some of the most skeptical and contrary people where I work.  Not directed at anyone, especially you.  You have been most helpful in resolving my other issues.

From what I've read in the posts, you guys are really gonna like me when I start running into problems using the diversion features.

[zoneblue]

Guys, i thought that the reason the SOC changes after a reset, is that the SOC reverts to the last value that was saved to eprom. EPROM writes occur at midnight each day (same for kWh/day etc). And since the last firmware, every 90 minutes for SOC at least. So the value that it resets to, may or may not be little or a lot different, that all depends on how active yor system is at that time. It can go up or it can go down depending on the time of day the reset occured.

I do not know what affects the frequency of resets, some report them regularly, others infrequently. However some probably watch there systems more than others so thats a factor.

[Vic]

Hi Garret,

Thanks,    no problem ...   sounds like work can be "fun"!

You are a real asset to the group,  am sure that we all will benefit from your observations and analysis.

And boB,  just a couple of things;

My Flooded batteries are not often deeply-cycled,  so Absorb is a larger percentage of the recharge,  and therefore these batteries appear to be less efficient than those under deeper discharge.  85%  was too high a number,  so just set it to 70%.

And,  I need not tell you that constructing a fairly accurate model of the discharge/recharge behavior almost any battery is not a simple process ...  seem to be many variables.

Am presently Skipping 3 recharge days on the bank that is most heavily used,  but sometimes  will Force Bulk on a Skip day,  when needed.   Furthermore,   on occasion will goose up the Vabs to try to get a full charge when WX has been  dim.  Each of these things should impact what appears to be the efficiency.

The second item,  is that  Battery Monitor SOC is simply (in my mind)  a very approximate guess of what the real SOC of a battery.   And with FLAs,  can get a fairly close read on what the actual SOC is in a minute or two,  with the Hydrometer.   Am delighted that am not using AGMs.

The WBjr is a very,  very useful device,  which I use a number of times per day -- checking Net AH early in the day,  and then looking at the actual battery charge current,  later in Absorb  (always use Shunt EA to end Abs).   A very slick addition to the Classic.

The two main battery banks here are each ten years old,  but seem to be in generally good health,  with a lot or remaining Capacity.   Some carp about FLAs,  but would still go Floodeds,  if the decision needed to be made today.

Just my opinions,    Thanks,   Vic

[zoneblue]

Bob, im not convinced the local app reports DEBUG5 accurately. Mine has always said 0, even though the contents of those registers i send you from time to time says otherwise.

The classic just reset while i was typing this, and heres the registers:

peter@cubie:# ./newmodbus.1.0.18-ARM 192.168.0.223 4380-4390
ID CLASSIC
ClassicTime 13:00:59  02/01/2003
4380 10 (0xA)
4381 370 (0x172)
4382 76 (0x4C)
4383 0 (0x0)
4384 0 (0x0)
4385 599 (0x257)
4386 173 (0xAD)
4387 2996 (0xBB4)
4388 2 (0x2)
4389 0 (0x0)
4390 2007 (0x7D7)

Local app says:

Absorb Time:03:30:00
Equalize Time:01:00:00
Last Voc:87
DB1: 0x379cebac
DB2: 0x-40b5469b
DB3: 0x6a5b3422
DB4: 0x-53ace6b2
DB5: 0x0

firmware 1849
Application Version 0.3.65

[boB]

Bob, im not convinced the local app reports DEBUG5 accurately. Mine has always said 0, even though the contents of those registers i send you from time to time says otherwise.

Will have to have Andrew see this too.

Thanks for the info !

boB

[boB]

And boB,  just a couple of things;

My Flooded batteries are not often deeply-cycled,  so Absorb is a larger percentage of the recharge,  and therefore these batteries appear to be less efficient than those under deeper discharge.  85%  was too high a number,  so just set it to 70%.

I think you are talking about energy charging inefficiency and not amp-hour efficiency.

As far as I know, amp-hour efficiency is every that low.  Yes, it takes more watt-hours for the
Absorb area up when the SOC is in the 90% area.  But watt-hours and amp-hours are different
things.

Either way, it does not hurt to have the efficiency set on the low side.

boB

[Vic]

Hi boB,

Yea,  do know that the AH Efficiency is considerably higher than is energy.

Have never tried to set this Efficiency value correctly,  as am always twisting the knobs,  trying to avoid charging for as many days as is reasonable,    and also that it is not a meaningful quantity to me.  Have fairly large battery banks,  that occasionally need to be deeply-cycled.

The other data from the WB  IS useful,  and that is what is used.

More later,  Thanks again,    Vic