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Questions tagged [solar]

67 questions
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How to account for the observer's elevation when calculating sunrise/sunset?

How to account for observer elevation when calculating sunrise/sunset? Calculating sunrise/set for any lat/longitude is no problem, but how to account for elevation instead of sea-level??? I've run out of combinations to try, and having spent over…
Stephen J
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Bifacial Radiance error when importing weather data

I keep getting the error: "Error! Solar altitude is -19 < -6 degrees and Idh = 26 > 10 W/m^2 on day 1 !Ibn is 0. Attempting to continue" for almost all days when I tried to import the TMY file from Meteonorm. Is there a reason behind it? Also, if…
Raj
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Solar PV - How to transpose daily GHI to a tilted surface?

I am trying to estimate PV output from daily GHI only. Is there a way to convert the daily GHI to total radiation on a tilted surface ie solar panel? Or do I have to use a model to convert to hourly GHI values and then calculate the beam and diffuse…
Digishack
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PVLib Forecast not adjusting for timezone

Background I'm attempting to produce a forecast of solar power using PVLib. I've followed all the instructions on the ReadTheDocs Page and am able to run through the query without issue and produce an output. Problem I've specified the timezone…
Bobby Heyer
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AISWEI Solar API - Get Plant List

I am trying to connect with the AISWEI Solar API. I was sent a API user manual and a Token by email. When i log into my account online I also see an APP Key which consists of a 9 digit number and a alphanumeric string after that. My issue is that i…
kyleprr
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Does anyone have any working code in Python or LabVIEW to get data from the SolisCloud Inverter API?

I have a solar installation with a Solis hybrid inverter and access to the SolisCloud API with my own plant info and secret key etc. I want to extract historical data to tell me how much energy the inverter has imported from the grid during 'Economy…
Magicbean
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Solar-Heating: Data analytics for Grafana, advanced query

I would need some help with a very specific use case I have for my homelab. I do have some solar panels on my roof, and I do extract a lot of data points to my server. I am using a specific app for that, making it easy to consume and automate stuff…
IceBoosteR
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How to Configure WEM-MX meter for energy tracking

As a warning this is a bit of a hectic endeavor. At work I'm trying to get a power meter to report its usage data. The meter that I am using is from this website http://www.energytracking.com/ (WEM-MX) this is a very old and outdated site, with very…
Leary00
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How do I calculate solar irradiance of 1 m^2 flat square at a latitude and longitude?

Is it possible using Python libraries like pysolar, pvlib or similarly to calculate the irradiance (Perez model) per day of the year of a 1 m^2 flat square situated at a certain latitude longitude
nickponline
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How to understand the solar zenith angle from tle data using pyorbital

Recently, I started processing tle data using pyorbital python library. I would like to get the solar zenith angle using this function: astronomy.sun_zenith_angle(utc_time, lon, lat) In degrees, I get a number between 0° and 180°. I don't really…
Gábor Kreinicker
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Solar PV seasonal pattern visualization using fanplot in python

I want to build some figures using the package fan plot or similar in Python I want to have a visualization of the intervals running from the darkest shade of the figures for the 50th percentile to the lightest ones at the 10th at the bottom and the…
cebep27
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Incident Solar Irradiation on inclinded plane using SolaR

I wanted to compare the global irradiation from the 9km grid ECMWF solar surface down irradiation with measured inclined irradiation at a site in Denmark. However, the results are not very good and I have found a lot of difficulty understanding the…
Blaiso
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ARKit: Converting Spherical Position to Cartesian Coordinates does not add point at correct place in ARKit

I am working on an app that shows Sun's orbit path around the current locations. Followed these steps. Get current location with CLLocationManager Get Azimuth and Elevation details of Sun with respect to current date time and location…
Haresh
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Solarwinds API SSL cert not able to verify

According to this post I should def verify the cert. https://thwack.solarwinds.com/product-forums/the-orion-platform/f/orion-sdk/35763/ssl-certificate-verification-or-not however, when I do generate the cert with openssl s_client -connect…
sam saul
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adding solar cells to PVLIB and modeling them

I am new to Pvlib and just started few days ago. We have four different solar cells installed in our university. I have the specifications of the four cells including Isc, Voc, Vmpp, Impp etc. I want to add these cells into the PVlib library and…
Hasan Jalal
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