Build 1760 2-10-2014

[zoneblue]

Another day with no problems, sunny, but some fast moving clouds mid cycle.  No current anomolies. EA remains steady at 0.5A after target.

[Westbranch]

ZB, are those hours along the bottom?  If so do you really peak at ~ 09:30?

[zoneblue]

Yes... floated at 10.55am. Its sunny old summer down under, but that bank always floats early in the day, for better or worse.  After the EA testing is done, ill give days between bulk a whirl, unless you have any better ideas.

[zoneblue]

Another day with nothing unusual.

Making an effort to maintain a stable (~2A)  baseload during the morning.

1% for this bank is 4A, but just to confirm lower EAs work ok, just lowered EA setting from 5A to 2.5A.

[dgd]

Yes... floated at 10.55am. Its sunny old summer down under, but that bank always floats early in the day, for better or worse.  After the EA testing is done, ill give days between bulk a whirl, unless you have any better ideas.

Looks like you could at least double the size of that battery bank and still have PV power to spare.
Bigger fridge for more beer?  heat water?
dgd

[boB]

boB,

Do you have another link to the latest firmware 1769 or up. I'm running 1758. Wanted to update to see a smoothing of EA.

The link posted a few replies up brings back a 404.

Thanks.

Cloud

Yes, sorry...   I didn't know we were linking to that page and I was trying to "clean up" a bit...

I think the old stuff is back as well as this brand new one...  Not much change but a little.
Mainly a different VMM QuickSet thing (makes Aux2 default to WB Jr.) and Classic doesn't
reset its date to 2003 everytime is reboots unless the power goes off or the date gets
corrupted.

http://fusion.midnitesolar.com/MidNiteSolarUpdate_1775_2-17-2014_v4.24.exe

boB

[Cniemand]

Thanks!

[zoneblue]

Today is about a smooth a curve as youll get i think.

EA was set to 2.5A, max absorb 2 hours.

It went into float at 1 hour 56 minutes at about 2.7A. Thats a tad early, cant really explain why that might have been.

By the end of day charge acceptance down to 0.4A, which is 0.1% of the bank Ah.

[Vic]

Updated Classic FW to 1772 a few days ago.   The WBjr amp readings are much,  much more stable now.

Thanks a lot boB,  it is now even easier to set WB EA than before.

The WBjr is sure a great addition to Classic battery charging.
Will UD to the latest FW for both the MNGP and Classic in a day or so,  to have a look at the SOC function ...   Thanks for that,  too!   Vic

[zoneblue]

Same weather today, this time EA=2.5A, Max absorb:2:30. Back to its previous pattern of a slight overshoot, floating at 2.3A.  My guess is the smaller the taper, the smaller the overshoot.

Anyway, no reoccurance of the missing classic amps. This will be my last curve for now but i will keep an eye on it. 

[boB]

Same weather today, this time EA=2.5A, Max absorb:2:30. Back to its previous pattern of a slight overshoot, floating at 2.3A.  My guess is the smaller the taper, the smaller the overshoot.

Anyway, no reoccurance of the missing classic amps. This will be my last curve for now but i will keep an eye on it.

What I see here is that when it went to Float, the battery voltage took a minute to drop and so the Classic cannot put out any current to keep it at Float since the battery voltage is still above the float set point.

So, right after the switch from Absorb to Float, the current will drop going into the battery and then after the surface charge dies off, the Classic will continue putting current into the battery at the lower voltage and current.


boB

[zoneblue]

You learn something interesting about charge control everyday with you around!

By overshoot, i was just refering to the 0.2-0.5 odd amps difference betw EA setpoint and actual transition. I guess thats a product of waiting for the 90 seconds below EA. Its not a problem at all, if people just set their EA a tad higher.

I want to echo Vics thanks for building such a great addon, and software for it.  Its making a lot of people real happy campers.