September 17, 2023

What You Need to Know About Solar Battery Warranties

Energy Efficiency

Understanding Solar Energy Storage System Warranties

Welcome to Shine Solar’s Blog! When it comes to investing in a solar energy storage system, one essential aspect to consider is the warranty that comes with it. A solar battery warranty can provide you with peace of mind, ensuring that you're covered in case anything goes wrong with your system. In this comprehensive guide, we'll explore everything you need to know about solar energy storage system warranties.

Table of Contents:

‍‍What Is a Solar Energy Storage System Warranty?

At its core, a solar energy storage system warranty is a guarantee provided by the manufacturer or installer that promises to replace or repair the solar battery in case of defects or faults. This warranty is designed to protect homeowners from financial losses if their solar battery fails to perform as expected. Here are some key points to consider:

  • Length of Warranty: The duration of a solar battery warranty can vary significantly depending on the manufacturer, battery type, and other factors. 5 years is the minimum that is usually offered, and 10 is the solid Industry Standard. To this date, there is only one exception to this rule is Storz Power solar battery warranties that cover up to 25 years.
  • Types of Warranties: There are two primary types of solar battery warranties: manufacturer warranties and installer warranties. Manufacturer warranties cover defects and faults in the battery itself, while installer warranties cover issues related to the installation process.


Why Solar Energy Storage System Warranties Are Important

Understanding the importance of solar energy storage system warranties is crucial for homeowners looking to maximize the benefits of their solar investment:

  • Financial Protection: Solar batteries are a significant investment, and warranties provide financial protection against unexpected issues, ensuring that you don't incur additional costs for repairs or replacements.
  • Performance Assurance: Warranties often cover factors like performance, capacity, and power output, guaranteeing that your battery will meet certain performance standards over the warranty period.
  • Long-Term Reliability: Solar batteries are expected to last for many years. A warranty ensures that your investment will continue to deliver reliable performance over time.


Key Elements of a Solar Energy Storage System Warranty

To make an informed decision when selecting a solar energy storage system, it's essential to understand the key elements of a solar battery warranty. Here's what you should look for:

  • Warranty Length: Check how many years the warranty covers. Longer warranties provide greater peace of mind. Most systems come with at least a 10-year warranty. We must mention that the Storz Power warranty is a recent exception as it covers up to 25 years.
  • Performance Guarantees: Look for guarantees related to the integrity and output of your battery system.
  • Cycles and Throughput: Understand the number of charge and discharge cycles the warranty covers and any throughput clauses. Some warranties may end when a certain number of cycles are reached.
  • End of Warranty Capacity: Many manufacturers guarantee that your battery will retain a certain percentage (often 60%) of its original capacity by the end of the warranty term.


Common Misconceptions About Solar Energy Storage System Warranties

There are some common misconceptions about solar battery warranties that you should be aware of:

  • Home Insurance Coverage: Solar battery warranties are separate from home insurance and provide specific coverage for battery-related issues.
  • Battery Durability: While warranties offer protection, proper maintenance and usage are essential to maximize battery lifespan.
  • Uniformity of Warranties: Not all solar warranties are the same, so it's crucial to review the terms and conditions of each warranty carefully.


Tips for Maximizing the Value of Your Solar Energy Storage System Warranty

To get the most out of your solar battery warranty, consider these tips:

  • Regular Inspections: Schedule routine inspections to identify and address issues early.
  • Record Keeping: Maintain records of your system's performance and any maintenance or repairs. This is not hard and can result very useful.
  • Understanding Your System: Familiarize yourself with how your solar energy storage system works, as this knowledge can help with warranty claims.


Quick Comparative Analysis of Solar Battery Brands

Let's compare the warranties of some notable solar battery brands:

Tesla Powerwall 2

  • Chemistry: Lithium-ion
  • Warranty Length: 10 years
  • Inverter Covered: Yes

LG Chem RESU 10H

  • Chemistry: Lithium-ion
  • Warranty Length: 10 years
  • Inverter Covered: No (It does not include Inverters)

Sonnen Eco 10

  • Chemistry: Lithium iron phosphate (LFP)
  • Warranty Length: 10 years or 10,000 cycles (whichever comes first)
  • Inverter Covered: Yes

Storz Power

  • Chemistry: Lithium-Iron Phosphate (LFP)
  • Warranty Length: Up to 25 years
  • Inverter Covered: Yes



In conclusion, understanding solar energy storage system warranties is essential for making informed decisions and protecting your solar investment. By carefully reviewing warranty terms, you can ensure that your solar battery system continues to provide reliable and cost-effective energy storage for years to come.

Remember, the specifics of warranties may vary between manufacturers and installers, so it's essential to read and comprehend the terms and conditions of your specific warranty thoroughly.

In Shine Solar, our experts will offer you the best possible solar battery systems for your solar installation. We will make sure it is installed properly and that you have the corresponding warranty, in case you ever need it. We take care of evert detail so you can relax and enjoy your solar system. Save money, have the peace of mind that a reliable energy source offers and help the environment, all that and more, with Shine Solar.

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Nick Gorden

Nick Gorden is the Co-founder and CEO of Shine Solar. Nick’s energy, enthusiasm, and leadership is contagious and has contributed to attracting a talented and successful executive team. His time is focused on strategic growth, maintaining profitability and creating the optimal customer experience. Nick has started, managed and sold companies within the communications, mortgage lending, insurance and real estate industries resulting in tens of millions of dollars of market value to investors.

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