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WBjr / Re: Watching the new Whizbang and batteries today...
« Last post by alyaz on Today at 08:21:47 PM »
Thanks Vic.

No, I did not know that.   ::)

So just leave it at the default setting then I guess?

Thanks much.
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Thanks Larry! Thats perfect. Nice work! Can't wait to put into action. I'm using the Classic (4 units total; 3 solar, 1 devoted to our hydro) as we are totally off grid. I do have a kid on the shelf I'm looking to deploy, likely on the hydro end of the system (which is .5 miles from the house)
I noticed that Node Red is already installed in current Raspberry Pi  operating system. I have not tried it with a Pi yet - was using it on my Windows 10  computer. But a Pi would be a nice low power controller compared to computer if it is stable enough to run long time.

Please stop back on the Node Red post I made if you get any control things running and share your code for it  ( called flows in Node Red).  I am just a beginner at that and haven't put much more time into - I should get back at it one of these days.

Larry
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WBjr / Re: Watching the new Whizbang and batteries today...
« Last post by Vic on Today at 07:22:36 PM »
Hi Al,

As you know,  Rebulk starts a new charge cycle on a given day.   Folks with reasonable battery Capacity,    often do not wish to use Rebulk,   as,  every charge cycle takes its toll on battery longevity.

I do not know anyone that uses Rebulk.   In special situations it can make sense.

All,   IMO,   FWIW,   Vic
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Thanks Larry! Thats perfect. Nice work! Can't wait to put into action. I'm using the Classic (4 units total; 3 solar, 1 devoted to our hydro) as we are totally off grid. I do have a kid on the shelf I'm looking to deploy, likely on the hydro end of the system (which is .5 miles from the house)
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WBjr / Re: Watching the new Whizbang and batteries today...
« Last post by alyaz on Today at 05:26:46 PM »
When in the Classic ‘end amps’ menu....

I have my end amps set at 12a... what setting is reasonable for the ‘rebulk' setting?  My float parameter setting is 27v.

Thanks.
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B17-5 and B17-3 / Re: Beta units
« Last post by onanparts on Today at 02:19:17 PM »
Are beta units available/out yet?  ???

Have users been selected yet? :-\

Not yet. Stay tuned in this B-17 sub forum for an announcement on when the Beta units will be available, and the details on how to get involved with the Beta testing etc.
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Hi Al,  and Larry,

As Larry noted,  the SOC that is calculated from the WbJr data  is approximate.   Obviously,   the Gold Standard for SOC of Flooded batteries is from measurements taken from an accurate Hydrometer (or Refractometer).   The longer period between full charges,  the less-accurate is this SOC calculation.   Assume that your Classic Resets SOC to 100% upon its transition from Absorb,  to Float.

There are many factors that reduce the accuracy of Wb calculated SOC,  like rate of discharge (and probably even rate of charge),   battery efficiency variations,   etc.
Agree with Larry about battery efficiency for FLA batteries.  Would start at 80% for a new,  but broken-in FLA,   and be ready to reduce this setting,   as needed.  MN Engineering recommends 94-ish percent for FLAs,   but this setting seems more appropriate for Sealed batteries (AGM,   Gel),   than  FLAs,   IMO.

Hydros need to be RINSED,   RINSED,   AND RINSED YET AGAIN  with Distilled Water after each measuring session (would not let the Hydro sit,  unrinsed for more than a couple of hours).   Rinsing  preserves the Hydro accuracy.

IMO,   Flooded batteries should be fully-charged at least twice per week,   perhaps once per week may be OK.   The deeper the Depth Of Discharge,   the more frequent should be the full-charge  --  do not let a deeply discharged FLA  sit,   without beginning a full charge.

Fully charging FLAs from a genset is usually not desirable,  BUT for off-gridders in Northern climes,  there little choice.  It must be done when the battery bank needs it.

One or two Pilot Cells should be chosen early in the lives of FLA batteries.   Usually,  these cells would be chosen from the cells that have the lowest SG,  when the bank is fully charged.   This will allow a quick way to measure the SOC of a FLA bank.

Al,  what are the SGs of each cell in your bank,  when fully charged?
How are you generally fully-charging this battery bank  --  Solar, or Genset?

Agree that 6 - 7 hours of Absorb is very long.   But in Winter,  perhaps this is OK,   as  you are unlikely to have this long a Solar day for the Classic to charge.   Perhaps this is in reference to the Absorb time setting in the Inverter/Charger ...

A bit of a minor nit,  is that the advertised Ah Capacity of 1104 should really be reduced to 1050-ish Ah,   as Surrette  specs Capacity for 1.280 SG electrolyte,  instead of the most-common fill electrolyte of 1.265.   Will make  little difference,   as actual C  varies a bit from cell-to-cell.

FWIW,   the Surrette 4KS25 banks here have the Efficiency set to 77%  IIRC.   It really should be set a bit lower,  at that  ...   they are in their 14th year of service (and we do Skip one day on one bank,   and three days on the other).

More later,  FWIW.   Good Luck,   Vic
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take a look on the Knowledge base for help to questions too .
One thing they say is that if your SOC is always going down is you might have the Whizbang installed backwards ?
http://www.midnitehelp.com/
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