---
title: "Forecast.Solar"
description: "Forecast.Solar is a built-in integration for Home Assistant. It has 67.6k installs sharing analytics and needs the vendor's cloud."
canonical: "https://vulpo.app/integrations/core/forecast-solar"
url: "https://vulpo.app/integrations/core/forecast-solar.md"
last-updated: "2026-10-22"
version: "1.4"
---

# Forecast.Solar

> Forecast.Solar is a built-in integration for Home Assistant. It has 67.6k installs sharing analytics and needs the vendor's cloud.

Forecast.Solar is a built-in integration that estimates solar energy and power production for a configured array. It adds sensors for estimated energy production this hour, next hour, today, remaining today and tomorrow, plus power estimates for now and for 1, 12 and 24 hours ahead. Peak power times for today and tomorrow are also provided as sensors. The forecast is based on panel azimuth, declination, location and total peak wattage entered during setup in the UI. Options cover an API key, inverter size, and damping factors for morning and evening results. A Get forecast action returns the production forecast as a time series, and the data comes from the vendor's cloud service.

Automatic summary of Home Assistant's source code. Something wrong? [Get in touch](https://vulpo.app/contact)

[Open in My Home Assistant](https://my.home-assistant.io/redirect/config_flow_start/?domain=forecast_solar)

## Supports

- **Uses the vendor's cloud**: Needs an internet connection and an account with the vendor.
- **Set up in the UI**: Add it in Settings, Devices and services. Nothing to download.
- **Updated with Home Assistant**: Ships and updates with every Home Assistant release.

## Setting it up

It is added under Settings, Devices and services, with Add integration.

### Connect

- **Azimuth (360 degrees, 0 = North, 90 = East, 180 = South, 270 = West)**
- **Declination (0 = Horizontal, 90 = Vertical)**
- **Latitude**
- **Longitude**
- **Total Watt peak power of your solar modules**

### After setup

- **API key**
- **Damping factor: adjusts the results in the evening**
- **Damping factor: adjusts the results in the morning**
- **Inverter size (Watt)**

Texts from Home Assistant's source code, [Apache License 2.0](https://www.apache.org/licenses/LICENSE-2.0).

## Entities

- **Sensors**: Estimated energy production - this hour, Estimated energy production - next hour, Estimated energy production - today, Estimated energy production - remaining today, Estimated energy production - tomorrow, Highest power peak time - today, Highest power peak time - tomorrow, Estimated power production - in 12 hours, Estimated power production - in 24 hours, Estimated power production - in 1 hour, Estimated power production - now

## Actions

- **Get forecast**: Returns the solar production forecast time series for a configured Forecast.Solar entry.
  Fields: Forecast.Solar entry, End, Resolution, Start

## Troubleshooting

- **Diagnostics**: Downloads a diagnostics file to attach to a bug report.

## At a glance

- Kind: Built-in integration
- Category: [Energy](https://vulpo.app/integrations/category/energy.md), Solar and batteries
- Brand: Forecast.Solar
- Number: 67.6k installs sharing analytics
- Connection: Needs the vendor's cloud
- Upkeep: Part of Home Assistant
- Needs: Built into Home Assistant
- Domain: `forecast_solar`
- Source: <https://www.home-assistant.io/integrations/forecast_solar/>

In Vulpo: Solar Panel card, Solar Peak card

[Home Assistant Energy Dashboard in Vulpo](https://vulpo.app/features/energy)

## Forecast.Solar in Vulpo

Forecast.Solar feeds the Solar Panel card, which compares production with the forecast, and the Solar Peak card, which shows when production peaks today and tomorrow. The Solar Production Live Activity (Pro) runs from a power sensor of your own, such as your inverter's.

- [Download Vulpo on the App Store](https://apps.apple.com/us/app/vulpo-for-home-assistant/id6758255800)
- [Home Assistant Energy Dashboard in Vulpo](https://vulpo.app/features/energy)

Independent directory, made by the developer of Vulpo. Not affiliated with Home Assistant or the Open Home Foundation. [About these numbers](https://vulpo.app/integrations/about)

Last updated 2026-10-22. Source: https://vulpo.app/integrations/core/forecast-solar

---

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