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potent heron Sep 13, 2023, 1:59 AM

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What to fix first? inverter/panel config? price tariffs? deferrable loads?

potent heron Sep 13, 2023, 2:23 AM

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It seemed to get better when I made the deferrable loads very small. Roughly matches my actuals.

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"perfect optimization"

glacial path Sep 13, 2023, 2:36 AM

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potent heron "perfect optimization"

That graph is looking nice.. You have a 10kW inverter, what size battery? How is your pricing setup?

potent heron Sep 13, 2023, 2:36 AM

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I have 20kW inverter, and just over 20kW of panels.

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My current energy pricing is :

Power Import
Peak (3pm-9pm) $0.3652 per kWh
Off-Peak (other) $0.2002 per kWh

Power Export
Peak (4pm – 9pm) $0.106 per kWh
Sholder (9pm – 10am) & (2pm-4pm) $0.055 per kWh
Off-Peak (10am-2pm) $0.039 per kWh

but the export is not configured like that in emhass

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UI did not support so many export prices. I didn't change the time stuff at all yet.

glacial path Sep 13, 2023, 2:40 AM

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OK, well setup your peak/ off-peak imports and maybe just set export to maybe the average of 0.05, to get things going.

potent heron Sep 13, 2023, 2:41 AM

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list_peak_hours_periods_start_hours:
  - peak_hours_periods_start_hours: "15:00"
list_peak_hours_periods_end_hours:
  - peak_hours_periods_end_hours: "21:00"
list_treat_deferrable_load_as_semi_cont:
  - treat_deferrable_load_as_semi_cont: true
load_peak_hours_cost: 0.3652
load_offpeak_hours_cost: 0.2002
photovoltaic_production_sell_price: 0.05

glacial path Sep 13, 2023, 2:41 AM

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maybe include three inverters of that model to get ~ 20 kW with 18 x 370W panels on each

potent heron Sep 13, 2023, 2:43 AM

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why are the inverters/panels data so out of date?

glacial path Sep 13, 2023, 2:45 AM

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potent heron why are the inverters/panels data so out of date?

uses a library called pvlib, david has been talking about upgraded to a more recent snap shot.

potent heron Sep 13, 2023, 2:45 AM

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(notes)
Panels are actually (Jinko) 43 x JKM470N-60HL4 (about half east, half west, 22 degrees)
Inverter is actually (Goodwe) 1 x GW20K-DT (3P 2MPPT)
Battery is actually (Tesla) 1 x Powerwall 2

glacial path Sep 13, 2023, 2:47 AM

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I have two inverters and half East half West, so this is useful. 2x 7.5 kW inverters but 18.5 kWp panels:

list_pv_module_model:
  - pv_module_model: Advance_Power_API_M370
  - pv_module_model: Advance_Power_API_M370
list_pv_inverter_model:
  - pv_inverter_model: SolarEdge_Technologies_Ltd___SE7600A_US__208V_
  - pv_inverter_model: SolarEdge_Technologies_Ltd___SE7600A_US__208V_
list_surface_tilt:
  - surface_tilt: 18
  - surface_tilt: 10
list_surface_azimuth:
  - surface_azimuth: 90
  - surface_azimuth: 270
list_modules_per_string:
  - modules_per_string: 29
  - modules_per_string: 21
list_strings_per_inverter:
  - strings_per_inverter: 1
  - strings_per_inverter: 1

potent heron Sep 13, 2023, 2:47 AM

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It's astonishingly slack to be using March 2019 data in September 2023.

glacial path Sep 13, 2023, 2:51 AM

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Have you been able to setup additional inverters, in the config to get closer to 20 kWp?

potent heron Sep 13, 2023, 2:53 AM

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I'm staring blankly at the configuration yaml at the moment. Wondering what values to use, and what is impact of same

glacial path Sep 13, 2023, 2:54 AM

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Or just use the 20kW SolarEdge:

SolarEdge_Technologies_Ltd___SE20K__480V_

potent heron Sep 13, 2023, 2:55 AM

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OK will try that

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Need to scale the panels to match something that exists. There is a jinko that's 420W so fairly close. Sec.

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How do I convert the string in the csv to something for the yaml?

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all special characters to _. Hmm

glacial path Sep 13, 2023, 2:58 AM

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Just replace all of the special charaters including spaces to _

potent heron Sep 13, 2023, 3:02 AM

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list_pv_module_model:
  - pv_module_model: Jinko_Solar_Co___Ltd_JKM410M_72HL
list_pv_inverter_model:
  - pv_inverter_model: SolarEdge_Technologies_Ltd___SE20K__480V_
list_surface_tilt:
  - surface_tilt: 22
  - surface_tilt: 22
list_surface_azimuth:
  - surface_azimuth: 90
  - surface_azimuth: 270
list_modules_per_string:
  - modules_per_string: 24
  - modules_per_string: 25
list_strings_per_inverter:
  - strings_per_inverter: 2

Scaled 43*470W to 49*410W

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So, using day-ahead, it's only predicting 4.4kW for today + tomorrow, when it's actually twice that already...

glacial path Sep 13, 2023, 3:08 AM

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what does perfect return?

potent heron Sep 13, 2023, 3:10 AM

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Looks about the same as today/yesterday in perfect. ie ~8kW peak. It's only early spring here.

glacial path Sep 13, 2023, 3:11 AM

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You should also have some new sensors in HA; sensor.p_batt_forecast, p_load_forecast, p_grid_forecast, p_soc_batt_forecast, with attributes for the next 24 hours.

potent heron Sep 13, 2023, 3:11 AM

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Sec, will look.

glacial path Sep 13, 2023, 3:14 AM

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Next steps are to get a curl command working as an automation to call the REST end points, in stead of pressing the buttons on the web interface. https://emhass.readthedocs.io/en/latest/intro.html#usage

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I use the rest_command integration in place of the curl command, but the documentation is written around curl to get it running.

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I'm offline for a meeting now, will catch in with you later.

potent heron Sep 13, 2023, 3:15 AM

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thanks, ttyl, I should probably do some work too 🙂

solid ginkgo Sep 13, 2023, 8:19 AM

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glacial path uses a library called pvlib, david has been talking about upgraded to a more rec...

you can get the most recent inverter/panel list from SAM. I just downloaded their tool and got the CSV's from the installation files

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however I noticed that pvlib has some inverters/panels that SAM doesn't have. So I merged the two

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pvlib.pvsystem.retrieve_sam(name=None, path=str(path))

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you can do this to search in the custom CSV located at path

glacial path Sep 14, 2023, 5:11 AM

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How did you get on? Any joy with the REST payloads via curl?

potent heron Sep 14, 2023, 5:25 AM

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I’m sure that would be fine, but unless it controls something it’s kindof pointless right?

glacial path Sep 14, 2023, 5:33 AM

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potent heron I’m sure that would be fine, but unless it _controls_ something it’s kindof poin...

That how it updates the forecasts for your battery via an automation calling a shell command with the curl payload instead of you pushing the optimise & publish button on front page. For day ahead you call the optimisation once a day and the call the publish endpoint every five minutes to update the forecasts.

Even without controlling your battery or deferrable loads it can still give you insights into the optimal plan for your battery.

potent heron Sep 14, 2023, 6:00 AM

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It's PV estimate (on day ahead) is useless. About half what it should be...

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But the shell commands seem to run (at least they return HTTP201)

shell_command:
  dayahead_optim: "curl -i -H \"Content-Type:application/json\" -X POST -d '{}' http://localhost:5000/action/dayahead-optim"
  publish_data: "curl -i -H \"Content-Type:application/json\" -X POST -d '{}' http://localhost:5000/action/publish-data"

glacial path Sep 14, 2023, 6:12 AM

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potent heron It's PV estimate (on day ahead) is useless. About half what it should be...

I feed my own PV estimate from SolCast so I have control:

https://emhass.readthedocs.io/en/latest/forecasts.html

potent heron Sep 14, 2023, 11:21 PM

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Looks like emhass added it's own scheduled jobs to call those shell_commands...

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It's still way under-estimating my solar tho

glacial path Sep 15, 2023, 1:29 AM

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potent heron Looks like emhass added it's own scheduled jobs to call those shell_commands...

EMHASS doesn't provide any automations you need to set them up yourself.

potent heron Sep 15, 2023, 1:29 AM

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I 100% don't remember setting up those

glacial path Sep 15, 2023, 1:41 AM

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potent heron It's still way under-estimating my solar tho

Sounds like you would be better with one of the other forecast models: https://emhass.readthedocs.io/en/latest/forecasts.html#pv-power-production-forecast

I actually just inject my own forecasts from SolCast and ignore all the solar forecasting from EMHASS: https://emhass.readthedocs.io/en/latest/forecasts.html#example-using-solcast-forecast-amber-prices

glacial path Sep 15, 2023, 1:42 AM

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potent heron I 100% don't remember setting up those

Can you post their content I'm intrigued..

potent heron Sep 15, 2023, 2:16 AM

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sec

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alias: EMHASS day-ahead optimization
trigger:
  - platform: time
    at: "05:30:00"
action:
  - service: shell_command.dayahead_optim
    data: {}

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alias: EMHASS publish data
trigger:
  - minutes: /5
    platform: time_pattern
action:
  - service: shell_command.publish_data
    data: {}

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Maybe I did it, and forgot. I pasted the shell command yaml from one of the docs I was reading....

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# for emhass
shell_command:
  dayahead_optim: 'curl -i -H "Content-Type:application/json" -X POST -d ''{}'' http://localhost:5000/action/dayahead-optim'
  publish_data: 'curl -i -H "Content-Type:application/json" -X POST -d ''{}'' http://localhost:5000/action/publish-data'

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Looks like day-ahead automation was created 12:05:07 on 13/sep

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Which is off the top of my logs

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I think I must have done this: https://github.com/davidusb-geek/emhass#common-for-any-installation-method

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