Get total energy generated by a pv system in their lifetime

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c01s asked Aug 23, '22

Get total energy generated by a pv system in their lifetime

Hi all!

I would like to fetch the overall energy a pv system has generated in their lifetime, in an hourly interval via the Rest API. This is needed as I do want to do that programmatically. I don't have direct access to the devices, only via the API.

According to the documentation, it is possible to get the energy information for a defined interval (start-end) and granularity using the following endpoint: v2/installations/{installation ID}/stats.

This however is only available for the last 5 years. If the system is older than 5 years, any information about previously generated energy would be lossed.

Unfortunately also the "v2/installations/1039/overallstats" endpoint only returns datapoints, which are for the current year (or month, or current week).

The question is now, is there a possibility to get the overall energy, generated by the pv system? Or would I need to use the "v2/installation/{installation ID}/stats" endpoint for the sum of the last 5 years?

api

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c01s commented · Sep 02, 2022 at 06:40 AM

Bumping this, is there any support from Victron maybe?

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Answer 1 · 2022-08-23T14:04:04Z

Alexandra answered · Aug 23, 2022 at 02:04 PM

@c01s

If you have Victron DC MPPTs you can get the lifetime total off the unit itself.

screenshot-20220823-160148.jpg (24.1 KiB)

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Answer 2 · 2022-08-23T14:05:51Z

c01s answered · Aug 23, 2022 at 02:05 PM

@Alexandra sorry, I forgot to mention it, unfortunately I don't have direct access to the devices, I only have access to the API :( Is it possible to fetch that value via the REST API?

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Alexandra ♦ commented · Aug 23, 2022 at 02:15 PM

@c01s

That is above my 'play' grade. It is not reported to the GX directly or to the VRM widgets, so no idea there.

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Answer 3 · 2022-08-23T17:35:07Z

johanndo answered · Aug 23, 2022 at 05:35 PM

You can read the history statistics of your MPPT controllers if you haven't reset them in the meantime. They are in your BT App, on your Cerbo in the charger detail pages. Charger device, System Yeld.

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c01s commented · Aug 24, 2022 at 05:38 AM

Hi, sorry did not mention that in the post before, I do only have access to the rest API. Is there any way to get that from there?

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johanndo c01s commented · Aug 24, 2022 at 02:34 PM

Not specified what the rest API is in the Victron world, you need to do some more digging if you cannot get on the devices. There are no web service interfaces, but you can use MQTT to subscribe to messages.

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c01s johanndo commented · Aug 29, 2022 at 07:20 AM

I am referencing to this docu [1]. I got the endpoints from there, they also provide a sandbox for testing.

[1] https://docs.victronenergy.com/vrmapi/overview.html

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