A solar off-grid PV power generation system is a type of power generation system that converts solar energy into electricity and operates independently of the power grid. This system consists of solar panels, controllers, inverters, and batteries. Through the use of controllers and inverters, solar panels transform solar energy into direct current (DC), which is subsequently transformed into alternating current (AC). Batteries are used to store the electricity produced for later use. In such systems, the choice of battery is particularly critical. Which are the best batteries for solar off-grid use？

Off Grid Solar Battery Types

At present, the commonly used battery types for off-grid photovoltaic power generation systems include lead-acid battery, lithium iron phosphate battery and lithium-ion battery. These batteries are suitable for a variety of scenarios due to their different characteristics. The following will introduce their characteristics and applicability in detail.

Lead-Acid Batteries: A Long History and Mature Technology

The history of lead-acid batteries dates back to 1859 when French scientist Gaston Planté invented them. Using two lead plates as positive and negative electrodes, separated by rubber and immersed in sulfuric acid as the electrolyte, Planté successfully achieved the conversion between electrical and chemical energy, creating the first rechargeable battery. In 1860, Planté presented his lead-acid battery to the French Academy of Sciences, making it a focal point of attention.

As a well-established energy storage device, lead-acid batteries have maintained a dominant position in the off-grid solar energy sector due to their mature technology, low cost, and simple maintenance. Over decades of development, lead-acid battery technology has been continually refined. Advances have led to higher energy density and extended cycle life, further broadening their applications in energy storage.

As a manufacturer of lead-acid batteries, JYC Battery has also been dedicated to technological advancement and innovation, striving to provide higher-quality and more reliable solutions for off-grid photovoltaic power systems. JYC’s introduction of CCDR deep-cycle technology has brought revolutionary improvements to the lifespan and performance of lead-acid batteries.

JYC Lead-Acid Batteries

JYC Battery has over 20 years of experience in manufacturing lead-acid batteries. Its products are widely used in various fields, including UPS systems, telecom power supplies, electric power operation systems, solar energy storage systems, railway locomotive starters, emergency backup power, marine lighting, alarm systems, security devices, and electronic testing equipment.

Features of JYC Lead-Acid Batteries
  • CCDR Punching Technology: High-density punching grids with excellent corrosion resistance and consistency.
  • High-Quality AGM Technology: AGM separators fully absorb electrolytes, ensuring no free acid inside.
  • High-Purity Materials and Proprietary Formula: Combined with strict process control, these ensure low impurity levels, minimal float charging current, and extended battery lifespan.
  • Low Acid Density Design: Minimizes electrode plate corrosion, prolonging service life.
  • Advanced Heat-Sealing and TTP Technology: Ensures low internal resistance, outstanding high-power performance, and high energy density.
  • Stringent Production Control: Combined with advanced manufacturing equipment, it guarantees high product consistency.
  • Comprehensive Specifications: A wide range of models to meet diverse application needs.
  • Durable ABS Case: High-strength ABS enclosures with an optional flame-retardant version.
  • Customized Product Development: Offers tailored lead-acid battery solutions to meet specific application requirements.
Special Battery Grid Technology

In 2019, JYC Battery began trial production of lead-acid batteries utilizing CCDR Punching technology. After four years of rigorous validation and practical application, the technology demonstrated exceptional stability, reliability, and cost efficiency. By 2022, CCDR Punching technology had achieved large-scale production, with its products widely adopted across various fields. Their high performance and stability have earned widespread customer recognition.

With the maturation of JYC’s CCDR Punching technology-based lead-acid batteries, the company initiated trial production of the CCDR “Small Density Series” in 2024. This series features optimized structural design and manufacturing processes to deliver enhanced performance, reduced size, and greater versatility for diverse applications.

Looking ahead, as the Small Density Series enters mass production, JYC Battery plans to further expand its application scenarios in high-end markets such as energy storage, communications, and emergency power supplies, help more industries achieve green and efficient energy solutions, and promote development and progress of lead-acid battery technology through continuous innovation.

Lithium Iron Phosphate Battery: Safe, Eco-Friendly, and Durable

Lithium Iron Phosphate Battery offers significant advantages in off-grid photovoltaic systems due to their high safety and long lifespan. With exceptional cycle life, these batteries maintain stable performance even after thousands of charge-discharge cycles, extending system operation and reducing replacement costs. Their outstanding thermal stability ensures safe operation under extreme conditions, enhancing system reliability. Additionally, LiFePO₄ batteries support deep discharge and high-rate charging, maximizing solar energy utilization and improving overall energy efficiency. As an eco-friendly option, they contain no rare or harmful metals, aligning perfectly with the high environmental standards of renewable energy systems, making them an ideal choice for building green energy solutions.

Lithium-Ion Batteries: High Energy Density, Flexible, and Efficient

Lithium-ion batteries have become an ideal energy storage option for off-grid photovoltaic power generation systems due to their high energy density and excellent performance adaptability. Their lightweight design and compact structure can effectively save space, making them more suitable for portable and small photovoltaic systems. In addition, the high-efficiency charging and discharging characteristics of lithium-ion batteries can quickly store energy when the sun is sufficient and provide continuous power output at night or in rainy weather, ensuring stable operation of the system around the clock. Lithium-ion batteries also have excellent low-temperature performance and can still maintain efficient operation in cold climates, meeting the application requirements of various geographical environments. With their efficient and flexible energy storage capabilities, lithium-ion batteries provide reliable energy guarantees for off-grid photovoltaic power generation systems and help promote the widespread application of clean energy.

JYC Lithium Batteries

While the main industry remains unchanged, JYC Battery has expanded into related fields of the lithium battery industry to achieve full coverage of lithium battery products. Now, it has developed a full range of lithium batteries, such as industrial batteries and energy storage batteries, and various products are widely involved. The upstream and downstream related industries of the industry have been appropriately extended, and it has entered the ranks of world-class lithium battery companies. With high-quality products, a sound network, and perfect services, it provides consumers with a brand-new consumption experience, helps millions of people live a better life and leaves the mark of JYC Battery in every sunny place in the world.

How to Choose the Right Off-Grid Solar Battery

Users should be able to comprehensively evaluate battery types based on application scenarios, budgets, and performance requirements. For example, lead-acid batteries are suitable for cost-sensitive and loose application conditions; lithium iron phosphate batteries are suitable for energy storage systems with high safety and life requirements; lithium-ion batteries are more suitable for small, portable devices or systems with special requirements for high energy density.

JYC Battery is committed to providing users with high-quality energy storage products and professional solutions, whether lead-acid batteries or lithium products, that can meet diversified needs to help users build efficient and reliable off-grid photovoltaic power generation systems.