Vitovalor PT2 - Acceptable electricity output

[ThijsVandenryt]

Hi,

i have a Vitovalor PT2, which was installed about a week ago. The electrical output of the fuel cell is more-or-less constant at 670W, which is more than 10% lower than the projected value of 750W.

Is this to be expected?

With kind regards,

Thijs

[Konto wurde gelöscht · Accepted solution]

Hello Thijs,

the new fuel cell has started up and definitely has to reach it's 750 W. If this does not happen our technician should check your system.

Best regards, Robin

[ThijsVandenryt]

Thank you for your reply!
After about a week and-a-half of operation, the production has creeped up to 690W, so it might take a while before it produces its full output.

Is there any way for customers to view the output in a (webbased) graph, as it is with the Vitovalor 300P? Because the only way to monitor the system is using the diagnostic information in the Vicare App or the "vitoguide.viessmann.com" webinterface. But neither produces convenient information to monitor the system or change my behaviour to optimize the runtime of the fuel-cell (E.G. when to take a shower etc).

[Konto wurde gelöscht]

The drop in performance is quite unusual for a new Vitovalor. Your specialist company should definitely initiate a review here. Something is definitely wrong here.
Is the ViCare app in sync with the energy cockpit? Is the Vitovalor located in Germany?

The energy flows of the Vitovalor can be visualized web-based with the help of the Viessmann GridBox. Unfortunately only a link in German here. Sorry ...

Best regards Robin

https://www.viessmann.de/de/wohngebaeude/photovoltaik/stromspeicher-systeme/gridbox.html

[ThijsVandenryt]

Hi Robin,
The ViCare app is synced, I get an update of the measured values every few seconds, and I am informed that "the system is doing well" 🙂 The system is located in Belgium.
Just to be clear, the reported electrical output, is the one reported by the ViCare app. But, I do have an additional pump for my heating system, which is fed from the Vitovalor(connector 40 or 40A), but the pump only consumes +/-15W. I don't know where the produced power is recorded and if this is taken into account.

The gridbox is working at a higher level than I would like to have, for me it would be more interesting to see the values from the diagnostic information menu, but displayed in a graph. I will probably make something like this when I have a lot of time on my hand 🙂 It is annoying that I cannot track the realtime output from the machine itself, so I have to take notes every one-in-a-while myself.

I will see what is happening in a week, if i don't get close to 750W, I will ask to initiate a review, but given the current covid craze, it will have to wait for some time. 

With kind regards,
Thijs

[Konto wurde gelöscht]

Hello Thijs,

the current "electrical power" can be queried directly on the Vitovalor via the energy cockpit. Under "History of electrical energy generated", electricity generation is shown as a bar chart. All values ​​should be mirrored synchronously in the app. Your system is activated via ViCare and can therefore be viewed by us. We can remotely confirm the very unusual drop in performance that has nothing to do with the separately connected pump. The power fluctuates at around 700 watts, which is very unusual for a new system. Do not wait long and inform your specialist company that should initiate a check. At this point, it has 674 watts, which should not be tolerated.

Best regards, Robin

[ThijsVandenryt]

Thank you for the confirmation,
I will ask my installer to initiate a review!

[ThijsVandenryt]

A quick update:
The issue has been resolved, despite what was claimed by my gas distribution company, we receive gas with a low caloric value instead of a high caloric value. We received very good assistance from the technician of Viessmann Belgium.

So, in summary: if your Vitovalor PT2 generates between 10 and 15% lower electrical output (637,5 W- 690 W) than the expected 750W, you will probably have the wrong gas-type set up.

[Konto wurde gelöscht]

Hello Thijs,

thanks for your feedback. I already thought something like that. When delivered, the PT2 is set to the gas "Erdgas E". Depending on the region and gas quality, it may be necessary to switch to the "Erdgas LL" gas. Everything is going well now ... 😉

Best regards, Robin