Generator stops at st voltage

Mate3 and Mate3s communications devices for Outback Power

Generator stops at st voltage

Postby RayMar on Sat Oct 27, 2018 8:49 am

Hi All. I have set the Mate 3 to automatically start the generator at low voltage. This works fine except the generator runs to achieve the absorb voltage . This means the generator runs for a long time.... How can I set up the mate 3 so, for example, the generator starts at say 47.2 volts and switches off at 50.0 rather than say 58.4?
RayMar
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My RE system: 48v VFXR3048E 3 kW Inverter Charger
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Turbo Energy 422Ah@ C10 configured 48 volt 822 ah
3200 watt Solar array

Re: Generator stops at st voltage

Postby Mike Curran on Sat Oct 27, 2018 3:13 pm

The fxr manual says "When the AC source (gen in your case) is restored, if the battery voltage does not decrease to the Re-Bulk point, the charger will not enter the Bulk stage and will return to its previous stage".

I take this to mean that if you set your rebulk voltage lower than your Gen start voltage, your system should revert to its previous charging state while the generator runs and I'm assuming shut down without entering the absorb stage, if that's not what it was doing before.

Pure speculation on my part, don't have first hand experience - just reading the manual.
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Re: Generator stops at st voltage

Postby RayMar on Sat Oct 27, 2018 3:26 pm

Thank you very much. I will give this a try and let you know.
RayMar
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Posts: 5
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My RE system: 48v VFXR3048E 3 kW Inverter Charger
Outback Mate 3
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Turbo Energy 422Ah@ C10 configured 48 volt 822 ah
3200 watt Solar array

Re: Generator stops at absorb voltage

Postby RayMar on Tue Dec 04, 2018 9:27 pm

Hi All.
I have set the Mate 3 to automatically start the generator at low voltage. This works fine except the generator runs to achieve the absorb voltage . This means the generator runs for a long time...hours and hours . At the moment I thinking of experimenting.. I have set it up to be a two changer (Constant Current/Constant Voltage) on my 48 volt batteries by setting every stage to 57.6 volts - that is Bulk, Absorb, and Float. To stop the generator running a long time on "low voltage" my thinking is to reduce the Absorb voltage to say 54.0 which I assume will be the point where the generator would stop. With these settings, under normal solar charging conditions, am I right in thinking that the batteries will quickly move from Constant Voltage absorb 54.0 to Constant Voltage float 57.6 to charge up the batteries. Is there any problem in doing this apart from being in float mode for too long and losing water? I guess I am asking what's the real difference between Absorb & Float?
RayMar
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Posts: 5
Joined: Sat Feb 24, 2018 8:47 am
My RE system: 48v VFXR3048E 3 kW Inverter Charger
Outback Mate 3
Outback FM80 MPPT Charge controller
Turbo Energy 422Ah@ C10 configured 48 volt 822 ah
3200 watt Solar array

Re: Generator stops at st voltage

Postby SandyP on Wed Dec 05, 2018 12:26 am

RayMar wrote:Hi All. I have set the Mate 3 to automatically start the generator at low voltage. This works fine except the generator runs to achieve the absorb voltage . This means the generator runs for a long time.... How can I set up the mate 3 so, for example, the generator starts at say 47.2 volts and switches off at 50.0 rather than say 58.4?


Are you using the AGS function or the Gen Alert function to start the generator?

It seems for what you are after the Gen alert function will be best as it can use an upper battery voltage to stop the generator.

"Gen Alert is used as a controller for an AC generator with a remote start feature, although it has limited
functionality. (The generator recharges batteries using the inverter’s battery charger.)
 The AUX output will activate to start the generator when the battery voltage falls to a low set point for a
settable delay. The AUX output is deactivated, shutting off the generator, once the battery voltage rises
to a high voltage setting for a settable delay period. "
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