Warranty Conditions

These warranty conditions apply to TENTEK products purchased directly from us or from authorized distributors within Germany. In addition to your statutory rights, we provide a voluntary manufacturer’s warranty under the following terms.

1. Warranty Period

• Batteries (LiFePO₄ storage modules): 5 years
• Inverters / EMS controllers: 10 years
• Accessories & cables: 6 months

The warranty applies only to products purchased and used within the EU region.
All products are covered without additional usage limits or cycle restrictions unless otherwise specified.

2. Warranty Services

In the event of material or manufacturing defects during the warranty period, we will, at our discretion:

• Repair the defective product, or
• Replace it with an equivalent or higher-value product (new or refurbished), or
• Provide a refund based on the current value of the product.

3. What Is Covered?

• Verified defects caused by material or manufacturing errors.
• For energy storage systems: capacity degradation below the values defined in the product specifications.

4. Exclusions

The warranty does not cover:

• Improper installation, incorrect operation, or use outside technical specifications.
• Modifications or interference by unauthorized persons.
• Damage caused by force majeure (e.g., lightning, flooding), transportation damage after delivery, or damage caused by drops or impacts.
• Normal wear and tear or consumable components.
• Use with incompatible components or incorrect system configuration.
• Customer-induced damage or intentional destruction.

5. Warranty Claims (RMA Process)

For warranty inquiries, please contact our support team at support@tentekenergy.com.

Please provide the following information:

• Order number
• Serial number
• Description of the issue
• Photos or videos
• (Optional) Error code, if avai