---
title: "2025 Time Series and TMY API release notes"
slug: "clone-2025-api-lta-release-notes"
updated: 2025-12-05T08:18:14Z
published: 2025-12-05T08:18:14Z
---

> ## Documentation Index
> Fetch the complete documentation index at: https://kb.solargis.com/llms.txt
> Use this file to discover all available pages before exploring further.

# 2025 Time Series and TMY API release notes

| Release date | Released features |  |
| --- | --- | --- |
| 03.12.2025 v2.6.0 | - TMY and TS API now support 1-minute resolution within the new 1-minute TMY/TS API subscription plan. - TS API has a new parameter `splitOutputByYears` that splits up the response values into individual files by year when set to `true`. |  |
| 16.9.2025 v 2.5.0 | - TMY and TS API now support CSV download format. To download data as CSV, enter `“SOLARGIS_CSV”` under the `“outputFormat"` parameter. |  |
| 14.7.2025 v 2.4.0 | **TMY API update** - TMY API now supports GTI**parameters** in the request. - TMY API now supports optional environmental **albedo**(one yearly or twelve monthly LTA values)****and **horizon parameters** in the request. If you provide these in the request, they will be used in the GTI simulation and sent to you in the response as well. If you do not provide them, the system will use Solargis values instead. - TMY API now supports terrain shading as a boolean value and time zone offset in the request. - TMY API response now also sends albedo and horizon data (SOLARGIS_JSON format only) - Below is the full JSON request reflecting the changes. ```json { "latitude": 49.160155, "longitude": 19.852295, "timeStep": "PT15M", "tmyScenario": "P50", "siteName": "Pro example Site", "fileLabel": "offset", "utcOffset": "+01:00", "outputFormats": [ "SOLARGIS_JSON", "SAM" ], "terrainShading": true, "environment": { "surfaceAlbedo": 0.12, "horizon": { "azimuth": [ 0 ], "height": [ 0 ] } }, "gtiConfiguration": { "layout": { "azimuth": 180, "mounting": { "type": "FIXED_ONE_ANGLE", "tilt": 39 } } } } ``` |  |

Dataset representing hourly meteorological conditions over a typical year derived from long-term climate data.

Global tilted irradiation - the total amount of solar radiation received on a surface that is tilted at an angle relative to the horizontal.