📊 Generate Weekly Energy Consumption Reports with API, Email and Google Drive

This workflow automates the process of retrieving energy consumption data, formatting it into a CSV report, and distributing it every week via email and Google Drive.

⚡ Quick Implementation Steps:

• Import the workflow into your n8n instance.
• Configure your API, email details and Google Drive folder.
• (Optional) Adjust the CRON schedule if you need a different time or frequency.
• Activate workflow—automated weekly reports begin immediately.

🎯 Who’s It For

Energy providers, sustainability departments, facility managers, renewable energy operators.

🛠 Requirements

• n8n instance
• Energy Consumption API access
• Google Drive account
• Email SMTP access

⚙️ How It Works

Workflow triggers every Monday at 8 AM, fetches consumption data, emails CSV report and saves a copy to Google Drive.

🔄 Workflow Steps

1. Schedule Weekly (Mon 8:00 AM)

• Type: Cron Node
• Runs every Monday at 8:00 AM.
• Triggers the workflow execution automatically.

2. Fetch Energy Data

• Type: HTTP Request Node

• Makes a GET request to:

  https://api.energidataservice.dk/dataset/ConsumptionDE35Hour (sample API)

• The API returns JSON data with hourly electricity consumption in Denmark.

Sample Response Structure:

{
"records": [
{
"HourDK": "2025-08-25T01:00:00",
"MunicipalityNo": ___,
"MunicipalityName": "Copenhagen",
"ConsumptionkWh": 12345.67
}
]
}

3. Normalize Records

• Type: Code Node

• Extracts the records array from the API response and maps each entry into separate JSON items for easier handling downstream.

• Code used:

  const itemlist = $input.first().json.records; return itemlist.map(r => ({ json: r }));

4. Convert to File

• Type: Convert to File Node
• Converts the array of JSON records into a CSV file.
• The CSV is stored in a binary field called data.

5. Send Email Weekly Report

• Type: Email Send Node
• Sends the generated CSV file as an attachment.
• Parameters:
• fromEmail: Sender email address (configure in node).
• toEmail: Recipient email address.
• subject: "Weekly Energy Consumption Report".
• attachments: =data (binary data from the previous node).

6. Report File Upload to Google Drive

• Type: Google Drive Node

• Uploads the CSV file to your Google Drive root folder.

• Filename pattern:

  energy_report_{{ $now.format('yyyy_MM_dd_HH_ii_ss') }}

• Requires valid Google Drive OAuth2 credentials.

✨ How To Customize

Change report frequency, email template, data format (CSV/Excel) or add-ons.

➕ Add-ons

• Integration with analytics tools (Power BI, Tableau)
• Additional reporting formats (Excel, PDF)
• Slack notifications

🚦 Use Case Examples

• Automated weekly/monthly reporting for compliance
• Historical consumption tracking
• Operational analytics and forecasting

🔍 Troubleshooting Guide

Issue	Cause	Solution
Data not fetched	API endpoint incorrect	Verify URL
Email delivery issues	SMTP configuration incorrect	Verify SMTP
Drive save fails	Permissions/Drive ID incorrect	Check Drive permissions

📞 Need Assistance?

Contact WeblineIndia for additional customization and support, we're happy to help.