Author Topic: DC Generator through Whiz Bang?  (Read 542 times)

rlcumley1

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DC Generator through Whiz Bang?
« on: November 20, 2017, 06:33:27 PM »
Expanding my basic system.  Adding a shunt and a whizbang to my system.    I am also adding a gas driven, DC generator that will charge the batteries on low sun days.

I am unclear on the whizbang providing information to the Classic being affected by the gas driven DC generator.   My original plan was to connect the DC generator to the battery bus bar.   Would this confuse the Whizbang/Classic because power is being pushed into the batteries that does not flow through the shunt/whizbang?

Should I connect the generator to the inverter side of the shunt/bus so that power from the generator flows through the shunt into the batteries??

thanks for your help.

ClassicCrazy

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Re: DC Generator through Whiz Bang?
« Reply #1 on: November 20, 2017, 07:43:47 PM »
The shunt in the system should have the negative battery cable go to one side of it  - and everything else is on the other side o the shunt. All power in the system goes through the shunt and is monitored by the Whizbang .

So on my system when I run the generator and it charges the batteries via the inverter , then that power can be seen as the System Amps on the Local Status App or on the MNGP it will show up on the Whizbang Junior screen.

So the answer to your question is to connect the negative side of your generator on the side where all the other negative connections are before the  shunt  ( only one connection on other side of shunt to the battery ) .

It won't effect anything in the operation of the Classic other than your SOC will count up - so if you were 50% SOC and you ran the generator it would count up towards 100%.  Everything else on the Classic will work the same since Absorb, Float, etc will be reacting to the battery voltage whatever it is .

Larry

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Classic 150 , 5s4p  Kyocera 135watt , 12s Soneil 2v 540amp lead crystal for 24v pack , Outback 3524 inverter
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Midnite KID MPPT 24 DC in to  12 volt AGM batterie

CDN-VT

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Re: DC Generator through Whiz Bang?
« Reply #2 on: November 26, 2017, 10:27:05 PM »
The shunt in the system should have the negative battery cable go to one side of it  - and everything else is on the other side o the shunt. All power in the system goes through the shunt and is monitored by the Whizbang .

So on my system when I run the generator and it charges the batteries via the inverter , then that power can be seen as the System Amps on the Local Status App or on the MNGP it will show up on the Whizbang Junior screen.

So the answer to your question is to connect the negative side of your generator on the side where all the other negative connections are before the  shunt  ( only one connection on other side of shunt to the battery ) .

It won't effect anything in the operation of the Classic other than your SOC will count up - so if you were 50% SOC and you ran the generator it would count up towards 100%.  Everything else on the Classic will work the same since Absorb, Float, etc will be reacting to the battery voltage whatever it is .

Larry

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Syonyk

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Re: DC Generator through Whiz Bang?
« Reply #3 on: December 22, 2017, 12:37:53 AM »
I am unclear on the whizbang providing information to the Classic being affected by the gas driven DC generator.   My original plan was to connect the DC generator to the battery bus bar.   Would this confuse the Whizbang/Classic because power is being pushed into the batteries that does not flow through the shunt/whizbang?[/quote[

Yes.  That will confuse the bejeebers out of the system.  Don't do that.

Quote
Should I connect the generator to the inverter side of the shunt/bus so that power from the generator flows through the shunt into the batteries??

Yes.  The only thing connecting to the battery pack negative terminal is the WbJr shunt.  EVERYTHING else connects to the other end of that shunt.

That's the only way that the system can work.  It tracks current out of the pack and current into the pack.  Anything else you do will be reported in the proper statistics on the Classic, but the battery pack state of charge calculations rely on that measurement.

I've got a separate charge controller on my east facing "morning panels" connected post-shunt (pre-shunt?), and their contribution is worked into the pack state of charge.  Same as my generator running through my inverter/charger.

Hook it up that way, and it'll be just fine.