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Old 01-13-2025, 06:06 PM   #1
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GEN AGS not turning off

About to take a trip up north so went to test the AGS on climate to ensure coach doesn't freeze if we lose power while away. Climate controls set to Heat only - > Set thermastat lower than current temp - > Set AGS ON for climate - > Gen started - > Temp reached in about 10 mins - > Gen continued to run for 3 hours before I manually shut it down.

Anyone have an idea what needs checking?

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Old 01-14-2025, 06:15 AM   #2
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My AGS also runs to charge batteries if they're below the AGS cutoff voltage and it may have been working as intended.
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Old 01-14-2025, 06:43 AM   #3
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When I program my AGS to start at voltage or temp, there is a "run time" step that I set also. The gen runs for that "set amount of time" then shuts off.
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Old 01-14-2025, 10:02 AM   #4
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Batteries were fully charged.
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Old 01-14-2025, 10:04 AM   #5
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When I program my AGS to start at voltage or temp, there is a "run time" step that I set also. The gen runs for that "set amount of time" then shuts off.

Unfortunately, I don't have that option. I have a Vega Touch system that manages the AGS on climate. It's my understanding it's supposed to cut off 10 minutes after reaching the set temp. I may need to install a separate AGS controller if I can't get this to work properly.
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Old 01-14-2025, 11:15 AM   #6
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Sounds like you need to have a discussion with Firefly.
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Old 01-14-2025, 11:42 AM   #7
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Sounds like you need to have a discussion with Firefly.
So far, that has never bore fruit .......but might as well give it another try....
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Old 01-14-2025, 06:12 PM   #8
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So far, that has never bore fruit .......but might as well give it another try....
Yeah, I know, but it is their software.

There's a Firefly employee here on IRV2 that chimes in every now and then. His ID is ProfessorHi and his signature is "Melvin w/Firefly".
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Old 01-14-2025, 09:19 PM   #9
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I have only used AGS for power and temp when needing to cool a little when dry camping.

I don’t really use our heat pumps.

Mostly I use the AGS for power backup.

Given your Aquahot is running on diesel but will use some battery power if you lose power then just setting your AGS to power has you covered for heat as well if your using Aquahot diesel for heat.

As to why your AGS to not turn down the generator after it was no longer needed? I don’t know. I would try a traditional AGS test for power. Set AGS extra conservative to a high DC volt number like 13V. Then kill power with AGS on. AGS should kick generator on fairly soon. See if AGS stops after batteries are full and generator is no longer needed. Or even if your generator will stop when you restore power.
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Old 01-14-2025, 10:24 PM   #10
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I have only used AGS for power and temp when needing to cool a little when dry camping.

I don’t really use our heat pumps.

Mostly I use the AGS for power backup.

Given your Aquahot is running on diesel but will use some battery power if you lose power then just setting your AGS to power has you covered for heat as well if your using Aquahot diesel for heat.

As to why your AGS to not turn down the generator after it was no longer needed? I don’t know. I would try a traditional AGS test for power. Set AGS extra conservative to a high DC volt number like 13V. Then kill power with AGS on. AGS should kick generator on fairly soon. See if AGS stops after batteries are full and generator is no longer needed. Or even if your generator will stop when you restore power.

I've upgraded the coach to 920AH Lithium. The idea of managing this through battery monitoring is a good idea. Because I've upgraded to Lithium and Vega Touch can't manage by monitoring Lithium voltage (it doesn't have the appropriate settings for lithium), I'll look into adding a separate AGS controller to the Magnumn-ARTR I installed which manages the charging based on SOC (only when hooked up). A separate AGS controller is needed to manage charging when not connected to shore power. Running the wiring to an AGS control point will be the biggest hurdle.
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Old 01-15-2025, 05:51 AM   #11
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Originally Posted by DreamCatcherVA View Post
I've upgraded the coach to 920AH Lithium. The idea of managing this through battery monitoring is a good idea. Because I've upgraded to Lithium and Vega Touch can't manage by monitoring Lithium voltage (it doesn't have the appropriate settings for lithium), I'll look into adding a separate AGS controller to the Magnumn-ARTR I installed which manages the charging based on SOC (only when hooked up). A separate AGS controller is needed to manage charging when not connected to shore power. Running the wiring to an AGS control point will be the biggest hurdle.
Light just went off....that's right the AGS problems when switching to Lithium in our "older" coaches..
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Old 01-15-2025, 10:22 AM   #12
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Light just went off....that's right the AGS problems when switching to Lithium in our "older" coaches..
I expected the AGS SOC/voltage control not functioning on the Vega Touch after the upgrade, but I don't get the connection with the climate function. The Vega Touch can manually start/stop the Gen as well as auto start the Gen based on Temp (it doesn't seem to care whether heat or AC is set on/off. I'm beginning to think it may be programmed just for AC meaning shutting off when temp goes below a set point, not above. If so, somebody forgot to think out side the box. Then the only way around is to install the separate AGS controller.

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Old 01-15-2025, 06:09 PM   #13
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I expected the AGS SOC/voltage control not functioning on the Vega Touch after the upgrade, but I don't get the connection with the climate function. The Vega Touch can manually start/stop the Gen as well as auto start the Gen based on Temp (it doesn't seem to care whether heat or AC is set on/off. I'm beginning to think it may be programmed just for AC meaning shutting off when temp goes below a set point, not above. If so, somebody forgot to think out side the box. Then the only way around is to install the separate AGS controller.

I assume you have installed a ME-BMK (Magnum Shunt & battery monitor)? Aside from custom hardware/software, that's the only way you will get the SOC data into the Magnum infrastructure. If you still have your ME-RVC bridges connected to the RV-C, the SOC data will also appear on the RV-C canbus, however the Vegatouch just ignores that parameter.

Regarding HVAC trigger, since the Vegatouch can control the HVAC, knows the temperature for each zone, whether you are on shore power or not, and can start/stop the generator, it has all it needs to trigger the generator stop as well as a generator start. To do the generator stop, the code only needs to watch the zone temps and shore power status to make a decision to stop the generator. If it doesn't, it's a bug or omission.

Be aware, if you attempt to go with a separate AGS, and you want to trigger a genstart based on HVAC calling for heat or cool, you will need to find a way to electrically trigger the AGS module. The ME-AGS requires an optional component, the ME-PT1 to accept a +12v signal that could be used to trigger a genstart. But within the Vegatouch world I don't know how you would accomplish generating that signal without some custom device and coding.

In the old days, including my coach, the AC roof units have a control module with a GEN output wire that goes high (+12v) when the [dedicated] thermostat calls for heat or cool. I don't know if that control signal is still available on a Vegatouch coach, and even if it was, it is unknown if it would be triggered by the Vegatouch system.

The Onan EC-30 AGS on my coach has three inputs that watch for those GEN signals from the three roof units. So, since the EC-30 also knows shore power status (except for some classics that don't have the shore power sense), it can make the decision to trigger a gen start. For gen stop, the roof unit controller should get info from the thermostat when the temperature goal has been satisfied and shuts off the GEN trigger signal. The EC-30 should then in turn schedule a genset shutdown.

As an alternative, you might consider using a notification system that warns you about high temps or shore power loss, then use appropriate tools to start your genset remotely if needed.
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Old 01-15-2025, 09:08 PM   #14
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I use a few monitoring tools that actively alert to my cell phone. The Vegatouch Nebula app will let me check power or temperature but it will not actively alert me if temp is high or low or if I loose shore power.

I use a tool called Tempstick that monitors power and temperature.
I also use a tools called Myspool.com to monitor power.
For power they need to be plugged up to a non inverter outlet. (Basement)

For temperature I also use Govee temp sensors. In the coach and the coach basement.

All these tools are simply to use, fairly reliable, inexpensive to purchase and have not reoccurring fees. They all require wifi to function and actively alert.

Basically I want to know if my coach temperature is not correct or if I lose power.
No system is perfect but these systems work around the Vegatouch’s inability to alert my phone when something is off plan.

If I get an alert then I just open the Nebula app to find out what is going on.

I use the same tool at home. I have my wifi on a small inverter so it keeps running a while if we lose power and the alerts work for a while as long as we have internet.
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