---
title: "Step-by-step guidance for installation changes"
method: POST
path: "/api/customer-service/installation-change-wizard"
tags: ["Customer Service"]
---

# Step-by-step guidance for installation changes

`POST /api/customer-service/installation-change-wizard`

## Request

- Base URL: `https://api.cernion.de`
- URL: `https://api.cernion.de/api/customer-service/installation-change-wizard`
- Auth: none declared

6 change types: operator change, storage retrofit, capacity increase, decommissioning, tariff switch, direct marketing

## Query parameters

- `token` string

## Request body

- object
  - `changeType` 'operator_change' | 'storage_retrofit' | 'capacity_increase' | 'decommissioning' | 'tariff_switch' | 'direct_marketing', required: Type of change the customer wants to make
  - `currentSituation` string, required: Description of current situation (minimum 10 characters)
  - `installationType` string: Optional: Type of installation (solar, wind, storage, etc.)
  - `mastrNummer` string: Optional: MaStR registration number
  - `token` string: Optional Cernion MCP token for this request. Overrides CERNION_TOKEN when provided.

## Response `200`

Successful response

- object

---

[API](https://skmtc.dev/cernion/apis/cernion-energy-tools-api.md) · [All operations](https://skmtc.dev/cernion/apis/cernion-energy-tools-api/llms.txt) · [OpenAPI document](https://skmtc.dev/cernion/apis/cernion-energy-tools-api/revisions/cdb94473b538?raw)