Print Page - Charge Controllers,WBJr and Charge Guidelines

Title: Charge Controllers,WBJr and Charge Guidelines
Post by: schroew on March 29, 2021, 09:46:29 PM

I installed a WBJr last December and decided it's finally time to get serious about charging. Unfortunately, I got stumped out of the gate. The FullRiver charging doc provides guidelines for constant current or constant voltage. Which is a better choice for Classic 150s?

3 250AH 24 volt batteries on 3 classics

Title: Re: Charge Controllers,WBJr and Charge Guidelines
Post by: ClassicCrazy on March 30, 2021, 12:08:59 AM

When the Classic is in Absorb it is charging constant voltage - the current will change to hold the voltage at Absorb setpoint.
Not sure what kind of battery Full River is.
You set the Absorb voltage, and Absorb time , and Float voltage.
If you have a Whizbang you can also determine and set it to end absorb using Ending Amps.
Oh I just saw your link to specs - looking at that now.
Larry

Title: Re: Charge Controllers,WBJr and Charge Guidelines
Post by: ClassicCrazy on March 30, 2021, 12:33:22 AM

from your specs
lower end of Absorb Voltage range is 29v
lower end of Float voltage range is 27 v
Temperature Compensation setting is -4 mv in Classic
I took these from the constant voltage chart and subtracted the +/- range . You can up tweak as batteries might need to the + top range .
Ending amps range I think is between about 3 and 4.8 amps but you need to do some watching of your batteries to determine this for sure.
See this guide for how to determine ending amps
http://www.midniteftp.com/support/kb/faq.php?id=113
Those must be either AGM or Gel batteries ?
Also look here for lots more info on charging , etc for Classic
http://www.midniteftp.com/support/kb/faq.php?cid=1

Larry

Title: Re: Charge Controllers,WBJr and Charge Guidelines
Post by: schroew on March 30, 2021, 08:56:04 AM

Thanks for the reply! Yes, they are AGM DC250-6. I will review the link you sent and post back here if I have any questions..

https://www.fullriverbattery.com/product/dc250-6/

Title: Re: Charge Controllers,WBJr and Charge Guidelines
Post by: schroew on March 30, 2021, 12:39:01 PM

Is the amps displayed on the WBJr page(status click 3 times) captured by any setting in the modbus ? I might be able to work this remotely if the amps are recorded by the software..

Title: Re: Charge Controllers,WBJr and Charge Guidelines
Post by: ClassicCrazy on March 30, 2021, 06:07:33 PM

Quote from: schroew on March 30, 2021, 12:39:01 PM
Is the amps displayed on the WBJr page(status click 3 times) captured by any setting in the modbus ? I might be able to work this remotely if the amps are recorded by the software..

It should say in the Modbus document for Classic.
Otherwise ask Graham in opensource section of the forums.

Larry

Title: Re: Charge Controllers,WBJr and Charge Guidelines
Post by: schroew on March 30, 2021, 07:20:10 PM

Cool beans- thx.

Title: Re: Charge Controllers,WBJr and Charge Guidelines
Post by: schroew on March 31, 2021, 09:32:22 AM

For those following this thread-
Graham quote
"Here is the code snip from the ClassicMQTT, the WhizbangBatCurrent is published to the MQTT broker"

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Other MidNite Electronics => WBjr => Topic started by: schroew on March 29, 2021, 09:46:29 PM