> For the complete documentation index, see [llms.txt](https://docs.altum.ai/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.altum.ai/english/sustainability/sustainability-api-v2/changelog.md).

# Changelog

Changelog of the deploy of the Sustainability API in format iteration (1.01) and (expected) release date (year, month and day).

### 1.05 - 2026-08-03

* Introduced a **new statistical method**, built from real-world building and energy label data, to estimate a building's **current measures** before evaluating them with the NTA 8800 model.

### 1.04 - 2026-05-20

* New inputs `battery_type`, `battery_system`, `ev_charger`, `electricicty_connection_type` , `netting_enabled` .
* New outputs `grid_import`, `grid_feed`, `electricity_need` , `battery` .

### 1.03 - 2026-05-07

* New outputs  `accuracy_indicator` and `definitive_beng2` 
* The `accuracy_indicator` measures the reliability of the estimated current energy label in ±1 label difference, which is converted to a 1-7 rating for simplicity at [Accuracy indicator](/english/sustainability/sustainability-api-v2/accuracy-indicator.md)
* Updated new ML model for cases where the definitive energy label is not known.

### 1.02 - 2026-04-14

* New input `number_of_solar_panels` translated to default values explained at [Measures](/english/sustainability/sustainability-api-v2/measures.md)

### 1.01 - 2026-03-26

* [NTA 8800 Energylabel v2 API](https://app.gitbook.com/o/pLuAKZrbll04y6968KwP/s/-Lw4gk5ARKsgVHFCdPZw/~/edit/~/changes/1423/sustainability/nta-8800-energylabel-v2-api) logic used internally as input. A separate call to [NTA 8800 Energylabel v2 API](https://app.gitbook.com/o/pLuAKZrbll04y6968KwP/s/-Lw4gk5ARKsgVHFCdPZw/~/edit/~/changes/1423/sustainability/nta-8800-energylabel-v2-api) is no longer required to received the current situation.
* New input `custom_measure_costs` explained at [Cost indicators](/english/sustainability/sustainability-api-v2/cost-indicators.md)


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation by asking a question.

Perform an HTTP GET request on the following URL with the `ask` and `goal` query parameters:

```
GET https://docs.altum.ai/english/sustainability/sustainability-api-v2/changelog.md?ask=<question>&goal=<user_goal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is what the user is ultimately trying to achieve, the reason they need the answer. Sharing it helps GitBook give you a better, more relevant answer. A goal is most helpful when it describes the outcome the user wants rather than restating the question. For example, with `ask=how do I create an API token`, a goal like `automate deployments from our CI pipeline` lets GitBook tailor the answer to that use case.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.