About Us: Manufacturers of Sustainable Lithium Batteries in Spain
We manufacture sustainable LiFePO4 batteries in Spain.
IONLY is an engineering and manufacturing company based in Valencia that specializes in lithium iron phosphate (LiFePO4) batteries. As a battery manufacturer in Spain, our commitment is clear: to offer sustainable, long-lasting, and locally developed energy storage solutions, from design through technical support.
A Valencian company with a European vision
We design and manufacture our batteries in Valencia
Up to 90 % of the value added comes from the European Union
We are committed to a responsible supply chain, free from critical dependencies on Asia. Our key components are European, and our assembly and design are 100% domestic. IONLY is a battery manufacturer in Spain that drives the local industry with its own technology.
From our facilities in Valencia, we oversee every stage of the process:
Engineering, installation, testing, and after-sales support. We design our products with a focus on energy efficiency and serviceability to maximize the service life of each battery.
Clean Energy, Responsible Technology
IONLY develops 5.3 kWh batteries with high-performance cylindrical LiFePO4 cells. Our systems are stackable and recessed, making them suitable for residential, commercial, and industrial projects.
Safe, Modular, and Scalable LiFePO4 Batteries
We currently offer this modular solution, but we will soon be expanding our product line to include:
· Residential and light-duty industrial models (51.2 V and 201.8 V) with a capacity of 5.3 kWh, which can be connected in parallel to reach up to 106 kWh.
· C&I line: 409.6 V and 42.4 kWh per unit, expandable up to 0.85 MWh.
· Utility-scale line: 821 V and 3.4 MWh in a 20-foot container.
All versions share standard modules, featuring a scalable and efficient modular architecture.
No cobalt or materials from conflict zones
We manufacture our products without compromising our principles of sustainability. We do not use cobalt or other materials associated with geopolitical conflicts or polluting extraction processes.
We comply with European Regulation EU2023/1542
Our technology complies with European battery regulations, including criteria for repairability, digital passports, traceability, and recyclability.
Why choose IONLY?
European, ethical and future-proof product
IONLY is more than just a battery. It is an energy storage solution built to last, be repaired, and evolve. Designed in Spain for the European market, based on the principles of eco-design, efficiency, and responsibility
We are committed to innovation and building close relationships
R&D&I with the Energy Technology Institute (ITE)
We partner with leading technology centers to ensure a product that is technically competitive, reliable, and certified from the outset.
Patent pending and full control of the value chain
IONLY features its own BMS, in-house-developed electronics, and patentable casings. This self-sufficiency ensures quality, traceability, and true differentiation.
Local technical support and customized financing
We provide repairs in less than 72 hours, offer advice on facility design, and provide direct financing for large-scale projects. Being close to our distributors is part of our value proposition.
Innovative SME Company
At iOnly Batteries, we hold AENOR certification as an Innovative SME, a recognition that attests to our commitment to research, development, and technological innovation (R&D&I).
This distinction positions us as a leading company in the energy sector, reinforcing our ability to offer advanced and sustainable energy storage solutions.
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