Warranty Policy

Marstek is committed to providing customers with reliable, high-quality energy storage products. This Warranty Policy describes the commercial warranty services provided by Marstek for products purchased through Marstekenergy.com.

This commercial warranty is an additional warranty provided by Marstek and does not affect or limit any statutory consumer rights you may have under applicable German and European laws.

1. Marstek Commercial Warranty

In addition to your statutory consumer rights, Marstek provides a voluntary commercial warranty for eligible products purchased through the official Marstek online store or authorized Marstek sales channels. During the applicable warranty period, this commercial warranty covers manufacturing defects and defects in materials that occur under normal and intended use.

Warranty Registration

Marstek Warranty Registration Process

To protect your warranty rights, please complete the warranty registration promptly after adding your device.

Method 1: Register when adding the device

When adding your device in the Marstek App, follow the on-screen instructions, enter the required information, and upload valid proof of purchase to complete the warranty registration.

Method 2: Register from the device details page

If you did not complete the warranty registration when adding the device, you can enter the device details page and select Settings → Warranty to access the warranty page. Follow the instructions to upload the required proof of purchase and complete the warranty registration.

* If accessories such as cables, chargers, or adapters have quality issues, please contact the Marstek after-sales service team directly at support@marstekenergy.com.

Warranty Period

Product	Warranty Period
Venus Series	10 years
Jupiter Series	10 years
B2500D	10 years
Microinverter	10 years
Smart Meter / CT	10 years

The warranty period begins on the date the device is activated.

For products purchased through authorized distributors or other sales channels, the applicable warranty terms may differ. For warranty service relating to such products, please contact the original sales channel or the Marstek after-sales service team at support@marstekenergy.com.

2. Warranty Coverage

The Marstek Commercial Warranty covers product issues caused by:

• Manufacturing defects;
• Defects in materials;
• Product defects occurring under normal and intended use;
• Functional failures attributable to defects in the product itself;
• Other defects covered by the applicable product warranty terms.

This commercial warranty applies only where the product has been installed, operated, and maintained in accordance with the applicable user manual, installation requirements, and technical specifications.

3. Exclusions from Warranty Coverage

Marstek is not responsible under this commercial warranty for product damage or malfunctions caused by circumstances outside the scope of this commercial warranty, including but not limited to the following:

3.1 Improper Use

• Failure to use the product in accordance with the product user manual;
• Improper installation;
• Incorrect wiring or connections;
• Operation under conditions exceeding the product's specified technical parameters;
• Use outside the product's specified operating environmental conditions;
• Damage caused by improper storage or transportation after delivery of the product.

3.2 Unauthorized Modification or Repair

• Unauthorized disassembly of the product;
• Unauthorized modification of the product;
• Unauthorized repair or maintenance;
• Unauthorized modification of product components or software;
• Repairs performed by service providers or personnel not authorized by Marstek.

3.3 Damage Caused by Accidents or External Factors

• Physical damage caused by drops, impacts, collisions, or similar incidents;
• Damage caused by water ingress or contact with liquids, except where the product is specifically designed for the relevant environment;
• Fire;
• Lightning;
• Flooding;
• Extreme weather or other force majeure events;
• Damage caused by pests, animals, or other external factors;
• Damage caused during transportation independently arranged by the customer.

3.4 Other Exclusions

The commercial warranty may not apply in the following circumstances:

• The applicable warranty period has expired;
• The product serial number has been removed, altered, or is no longer identifiable;
• The customer is unable to provide reasonable and valid proof of purchase;
• The product has been reported as lost or stolen;
• The product has already been refunded;
• The product was provided as a free gift, unless otherwise expressly stated;
• The reported fault cannot be reproduced or verified, and insufficient evidence is provided to establish the existence of a product defect covered by this commercial warranty.

The above limitations or exclusions of this commercial warranty do not affect any statutory consumer rights that may not be excluded or limited under applicable law.

4. Contact Us

If you have any questions about this Warranty Policy or would like to submit a warranty claim, please contact us :

Marstek Customer Service Team Email: support@marstekenergy.com

Marstek reserves the right to update this Warranty Policy based on actual business circumstances. For a specific purchase order, the version of the Warranty Policy applicable to that order shall be determined in accordance with applicable law.