Lithium batteries for solar panel installations in homes and industrial settings
IONLY
Batteries designed in Spain: repairable, reusable, and recyclable
Safe, efficient energy that is 100% compliant with European regulations
LiFePO4 Technology: Thermal Stability, Safety, and Over 6,000 Charge-Discharge Cycles
IONLY relies on LiFePO4 chemistry as the basis for all its batteries: a technology that provides maximum thermal safety, high energy efficiency, and a service life exceeding 6,000 cycles. Ideal for demanding applications where durability and operational stability are key.
We comply with the European Ecodesign Directives (EU2023/1542)
Our batteries comply with the new European ecodesign regulations, including EU2023/1542, ensuring a more sustainable, traceable, and transparent product for consumers and the industry.
Manufactured in Valencia with up to 90% European value added
IONLY is a battery manufacturer in Spain with its own assembly operations, a selection of European components, and an optimized supply chain. Up to 90 % of the added value of each battery is generated within the European Union.
CE, EMC, UN 38.3, IEC/EN, and Battery Passport Certifications
IONLY holds international and European certifications that validate the safety, electromagnetic compatibility, transport, and sustainability of its products. Each battery includes its own Battery Passport for full traceability.
Why choose IONLY
batteries over other brands?
Independence from the Asian market: a European product
IONLY designs and manufactures its products entirely in Europe, minimizing its reliance on Asian suppliers. This results in greater stability, availability, and quality control.
No cobalt or raw materials from conflict zones
Our batteries do not contain cobalt, offering an ethical, safe, and socially and environmentally responsible alternative.
Modular, serviceable assembly: a design built to last
Thanks to their modular design, our batteries are easily scalable, repairable, and upgradeable. A commitment to true repairability and waste reduction.
Warranty of up to 10 years and local technical support
IONLY offers a warranty backed by its Spanish headquarters with local support. Technical support is designed to resolve issues within 72 hours.
Total control of the process: from the cells to the management software
We design both the BMS and the balancing algorithms, which allows us to offer a comprehensive solution with continuous energy optimization and full integration with the inverters.
IONLY
Technical Specifications for
Our Lithium (LiFePO4) Batteries
To develop reliable and sustainable energy storage solutions through innovation and a commitment to excellence. We adapt to your needs.
-
Rated capacity
, 5.5 kWh | Usable capacity: 5.16 kWh -
Rated voltage
, 51.2 V | Depth of discharge: 90% -
Charge/discharge current
Up to 288 A peak -
Operating range
-20 °C to 60 °C | Humidity 0–95% | Altitude up to 3,000 m -
Advanced Communication
, RS232, RS485, CAN bus, Dry Contact -
Certificates
CE, EMC, UN 38.3, IEC/EN, EU2023/1542 (Battery Passport) -
Scalable product line under development
We currently offer a 5.5 kWh modular solution, but we will soon expand the line with:
● Residential and light-industrial models (51.2 V and 201.8 V), scalable in parallel up to 106 kWh.
● C&I line with 409.6 V and 42.4 kWh per unit, scalable up to 0.85 MWh.
● Utility-scale line at 821 V and 3.4 MWh in a 20-foot container.
All versions share the same modular, series-based architecture, ensuring efficiency, scalability, and optimized maintenance.
Intelligent and versatile design adapted to every need
Wall-mounted, rack-mounted or flush-mounted installation for an aesthetically pleasing appearance
IONLY allows for different mounting configurations depending on the project’s space, style, or architecture.
Customizable finishes: oak wood, walnut, pine, stainless steel, white or black
We creatively explore new technologies and processes to optimize our product and adapt to the needs of the market.
Reduction of internal imbalances due to redundant construction
The internal control system automatically balances the modules to improve the system’s lifespan.
Up to 16 parallel connectable modules (up to 80 kWh per string)
A fully scalable system, designed to grow along with the user’s energy needs.
IONLY Solutions for the Home
Real energy savings and greater independence from the grid
Smart storage to manage self-consumption and avoid spikes in electricity bills.
-
Compatibility with leading residential inverters
. Simple, plug-and-play integration with the most widely used systems in Europe. -
Scalable system: from a single-family home to homes with high energy consumption
Suitable for both small homes and villas with a pool, heat pump, and electric vehicle. -
Easy integration into existing solar installations
There is no need to replace the entire system. IONLY batteries can be adapted to installations that are already in operation. -
Flexible financing for households: no need to tie up capital
Customized financing programs to facilitate the adoption of sustainable energy.
IONLY Solutions for Industrial Environments
Secure and robust storage for high-demand businesses
IONLY offers durable, high-capacity solutions for critical processes.
Advanced integration with on-grid and off-grid industrial systems
It supports hybrid configurations, microgrids, and applications in environments with unstable power supplies.
Prevent critical downtime through redundancy and fault tolerance
A design intended to ensure operational continuity even in the event of isolated incidents.
A Commitment to Energy Independence and Corporate Sustainability
Reduce your reliance on the grid and improve your company’s ESG profile
Commitment to the Environment,
and the Circular Economy
Repairable, reusable, and recyclable batteries
IONLY is committed to a circular and responsible energy storage model.
European institutional support and an ethical approach to the value chain
We partner with technology centers and adhere to standards of traceability and ethics.
Modular design that extends service life and reduces waste
Thanks to their flexible design, the modules can be upgraded, repaired, or replaced individually.
Local production to minimize the carbon footprint
Manufactured in Spain with a short supply chain and low environmental impact.
Quick Comparison: IONLY v
. other batteries on the market
IONLY vs. Cobalt-Based Batteries
Greater safety, greater environmental responsibility.
IONLY vs. imported batteries
from Asia
More technical support, better quality control, and reliable delivery times.
IONLY vs. Batteries That Cannot Be Repaired or Recycled
IONLY batteries are designed to last, be repaired, and be reintroduced into the value cycle.
Put your trust in a Spanish company—
—a leader in energy innovation
National and international support with certified technicians
A technical team with real-world field experience and solutions tailored to each client.
Joint development with the Energy Technology Institute (ITE)
IONLY actively collaborates with leading technology centers in applied R&D.
Patents and proprietary know-how in balancing and assembly algorithms
Full control over the system’s key internal processes: hardware, firmware, and software.
News
Would you like more information or a customized quote?
Contact us today and take the first step toward smarter energy.
