My Solar PV Battery app

Hi @TrystanLea,

Thanks for getting back to me.

Refreshed feeds:
image

I 'm using (I think) a standard emontx setup, so just have those feeds, I added the _sim fields recently in my attempts to setup a battery simulator, I’ve highlighted the ones I believe I have in bold:

Cheers
James

Hello @James_Roberts sorry for the delay, do you have a battery or are you wanting to simulate the battery to see what effect it would have?

Hi @TrystanLea, The latter - I want to simulate the battery to see the effect.

Cheers
James

Hi, do you know if this ever came into being? I am struggling to make sense of the app headings as one seems to call the house use with divert, while the other calls house use without it as they are not aware of each other I guess.

Hi Mark, not as far as I know. I tried modifying the source code and had some success, but then the app was updated and my mods stopped working. In the end I used a combination of the standard My Solar Battery app and Home Assistant to monitor everything I wanted (including divert).

Ok great, I would delete the import_sim and import_sim_kwh , not sure why they are virtual feeds, or ignore them for now. You should just need the solar and consumption feed as inputs and then the post processor will generate all the other feeds, make sure that you have CREATE NEW selected for each of the output feeds. You may need to run the emoncms updater as there have been some recent changes to the post process module.

Here’s a screenshot of what this should look like:

Hi @TrystanLea ,

Thanks for following up - not sure what’s happening here, I’ve just done an update to make sure I’m on the same version (yes), but get a different looking screen to yours:

I.e. non of the options you do

I’ve tried doing this both before and after trying to add a My Solar & Battery App

Cheers
James

Hi, long time user and fan of emoncms here! I’ve just got a battery added to my solar PV system. Is there a document anywhere which explains what all the numbers & arrows mean in the lower half of the app screen please?

I’ve got mine working but struggling to comprehend all the flows exactly. I can’t find this app screen described in the emoncms documents.

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Does the app support battery forced export?

Here’s a screenshot zoomed in on the Octopus Flux Export peak period. The battery is force discharging at 6.4kw. I don’t understand the box I’ve circled in red, 12.3kwh going where?

Hello @butako1 good spot! I agree there is something not quite right there. I am planning to do some work on this app soon and will take a look at this then.

Issue created here: MySolarPV Battery export issue · Issue #210 · emoncms/app · GitHub

There is now a development branch that adds support for battery to grid / export, the calculations are fixed in the detailed power view so far, I still need to fix the historic daily kWh data view. Im also trying to work through a simpler way of setting up all the feeds as it does get very complicated!

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Daily history mode now matches the power view (in the mysolarpvbatteryfix branch for testing):

The app now requires the latest version of the emoncms post processor module and generates the kWh feeds for this on the fly when you load the app, a bit like how the MyHeatpump app builds all the daily summaries.

This reduces the feeds required when configuring the app to only the main power feeds.

See in the screenshot the power feeds selected as usual on the right and a new section for auto generated feeds on the left.