Open-Meteo Solar Forecast for Home Assistant (Marketplace integration)

Installs: 3k sharing analytics
GitHub stars: 168
Connection: Uses the vendor's cloud
Upkeep: Updated in the last 6 months
Version: 0.1.33, September 15, 2026
Category: Energy, Solar and batteries
Kind: Marketplace integration
Brand: Open-Meteo
Needs: Needs the Marketplace (HACS on 2026.10 and older)
Domain: open_meteo_solar_forecast
Source: github.com/rany2/ha-open-meteo-solar-forecast
Issues: Report an issue

Independent directory, made by the developer of Vulpo. Not affiliated with Home Assistant or the Open Home Foundation.

About

Open-Meteo Solar Forecast estimates how much energy solar panels may produce in the coming days. It adds sensors for estimated production this hour, next hour, today, the remaining part of today, and each day up to a week ahead, plus the time of the highest power peak. Several PV arrays can be configured, each with its own location, tilt, azimuth, module power, solar tracker type and DC efficiency. Inverter capacity can be shared by all arrays or set per array, and morning and evening damping, snow cover depth and a horizon file for shading are also available. Forecast data comes from the Open-Meteo cloud service, and setup runs through the Home Assistant interface. An action moves an array's location to given coordinates or to the home location.

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Supports

Uses the vendor's cloud Needs an internet connection and an account with the vendor.
From the Marketplace Installed through the Marketplace, formerly HACS.
Actively maintained Its author released or pushed a change in the last six months.

Provides

Sensors

Setting it up

Install it from the Marketplace and restart Home Assistant, then add it under Settings, Devices and services.

Connect

API key
API base URL
Name
Weather model
Inverter capacityThe AC capacity of a single inverter shared by all arrays in Watt (0 = no limit). Ignored if any array has its own inverter capacity set on the array pages.
Maximum snow cover depthIf greater than 0, the snow cover depth which results in zero module power.

Array

Latitude
Longitude
Declination0 = horizontal, 90 = vertical.
Azimuth0 = North, 90 = East, 180 = South, 270 = West.
Modules peak powerTotal Watt peak power of the solar modules in this array.
Array inverter capacityThe AC capacity of this array's own inverter in Watt (0 = no dedicated inverter). If any array has its own inverter, each array is clamped individually and the shared inverter capacity is ignored.
Solar tracker type
DC efficiency factor0.0 = 100% loss, 1.0 = no loss.
Morning damping factor0.0 = no damping, 1.0 = full damping in the morning.
Evening damping factor0.0 = no damping, 1.0 = full damping in the evening.
Use horizon fileUse the horizon line defined in the horizon file (see docs) to respect shading of the modules.
Partial shadingOnly if horizon is enabled: treat shadows as partial.
Horizon file pathPath to the horizon file (leave empty for the default path).
Add another array

After setup

API key
API base URL
Weather model
Inverter capacityThe AC capacity of a single inverter shared by all arrays in Watt (0 = no limit). Ignored if any array has its own inverter capacity set on the array pages.
Maximum snow cover depthIf greater than 0, the snow cover depth which results in zero module power.
Latitude
Longitude
Declination0 = horizontal, 90 = vertical.
Azimuth0 = North, 90 = East, 180 = South, 270 = West.
Modules peak powerTotal Watt peak power of the solar modules in this array.
Array inverter capacityThe AC capacity of this array's own inverter in Watt (0 = no dedicated inverter). If any array has its own inverter, each array is clamped individually and the shared inverter capacity is ignored.
Solar tracker type
DC efficiency factor0.0 = 100% loss, 1.0 = no loss.
Morning damping factor0.0 = no damping, 1.0 = full damping in the morning.
Evening damping factor0.0 = no damping, 1.0 = full damping in the evening.
Use horizon fileUse the horizon line defined in the horizon file (see docs) to respect shading of the modules.
Partial shadingOnly if horizon is enabled: treat shadows as partial.
Horizon file pathPath to the horizon file (leave empty for the default path).
Add another array

Texts from the code of rany2/ha-open-meteo-solar-forecast.

Entities

SensorsEstimated energy production - this hour, Estimated energy production - next hour, Estimated energy production - today, Estimated energy production - remaining today, Estimated energy production - tomorrow, Estimated energy production - day after tomorrow, Estimated energy production - 3 days from now, Estimated energy production - 4 days from now, Estimated energy production - 5 days from now, Estimated energy production - 6 days from now, Estimated energy production - 7 days from now, Highest power peak time - today, and 7 more

Actions

Update Array LocationUpdate the array location to match that of the provided coordinates, or to the configured HA home location if no coordinates are provided.Fields: Location Override

Troubleshooting

DiagnosticsDownloads a diagnostics file to attach to a bug report.

From the README

This custom component integrates the open-meteo-solar-forecast with Home Assistant. It allows you to see what your solar panels may produce in the future.

From the README of rany2/ha-open-meteo-solar-forecast, Apache License 2.0. Shortened.