Built for Long-Term Partners
Who Value Reliability Over Price
RUEN SOLAR is a factory-controlled lithium energy storage manufacturer serving distributors, EPC contractors, and energy solution providers who prioritize engineering discipline and long-term cooperation.
Built on Manufacturing Discipline, Not Short-Term Trading
RUEN SOLAR was founded with a clear purpose: to bridge the gap between mass-produced battery cells and the real-world demands of energy storage systems. We recognized that many buyers struggle to find suppliers who truly understand system integration — not just product specifications.
Unlike trading companies or cell-focused factories, we invested in building complete system manufacturing capabilities from day one. Every team member, from engineering to production, thinks in terms of how our products perform in actual installations — whether it's a residential backup system in Australia or a commercial peak-shaving solution in South Africa.
"We don't just sell batteries — we engineer energy storage solutions that our partners can confidently install, warrant, and stand behind."
Since 2015
Factory-Direct.
Engineering-Driven.
Global.
What you qualify is what you receive — we don't outsource critical processes or resell unknown products.
Factory-Direct Manufacturer
In-house lithium ESS production — not a trading company.
Approx. 100 In-House Staff
Engineering, production, QC, and international sales under one roof.
Proven Global Export
Serving Africa, North America, Europe, Australia, and SE Asia.
Manufacturing Facility
Quality Control
Global Logistics
Partners We're Built to Serve
Our manufacturing model, engineering depth, and service approach are designed specifically for professional energy storage buyers who value reliability over the lowest price.
Solar & ESS Distributors
Regional importers and wholesalers who stock and resell battery systems nationwide. We provide consistent quality across batches and flexible MOQ arrangements to support your inventory needs.
EPC Contractors
Project developers who design and build commercial, industrial, and microgrid installations. We understand tender requirements, project timelines, and the importance of documentation.
Local ESS Brands (OEM/ODM)
Energy companies with strong local marketing but no manufacturing capability. We provide white-label solutions with your branding, custom firmware, and tailored enclosure designs.
System Integrators
Inverter manufacturers and solution providers who need reliable battery partners. Our BMS communication protocols and long-term supply stability make integration seamless.
Telecom & Data Centers
Organizations requiring backup power for communication towers and critical infrastructure. Our 48V lithium systems offer reliable lead-acid replacement with superior lifecycle value.
Microgrid Developers 微电网开发商
Developers building campus, island, or industrial park power systems. Our modular ESS designs and EMS compatibility support complex multi-source energy architectures.
Does your business fit our partner profile? Let's discuss how we can support your goals.
Talk to Our TeamSystem Thinking, Not Just Cell Selling
While most battery factories focus on module production, RUEN SOLAR engineers complete energy storage systems. This system-first mindset shapes everything from BMS design to after-sales support.
Beyond Specifications — Real System Understanding
Our engineering team doesn't just match battery cells to enclosures. We design for real-world performance: how the BMS communicates with various inverter brands, how thermal management affects cycle life, and how our systems behave in your customers' actual installations.
BMS-Inverter-EMS Integration
Deep protocol expertise ensures seamless communication across your system architecture.
Residential to Container Scale
Unified engineering approach from 5kWh home systems to 500kWh+ container solutions.
Project-Level Understanding
We think beyond products to understand installation, commissioning, and field service realities.
In-House BMS Development
Custom BMS solutions with multi-protocol support for seamless inverter compatibility.
Thermal Management
Engineered cooling systems optimized for cycle life across diverse climate conditions.
Modular Architecture
Scalable designs that grow with your customers' needs without system replacements.
Safety Engineering
Multi-layer protection systems designed to exceed international safety standards.
Need engineering support for a specific system configuration? Our technical team is ready to help.
Discuss Your RequirementsOEM Without Chaos
We support OEM/ODM within controlled frameworks to ensure quality and consistency.
Enclosure Design
Branding, color, and housing customization.
BMS Protocol
Firmware adaptation for specific inverters.
Packaging & Docs
User manuals and boxes in your language.
System Config
Capacity and voltage matched to application.
OEM Partner
Customization Is Structured — Not Experimental
Many buyers worry that OEM means chaos — endless specification changes, inconsistent batches, and unclear timelines. At RUEN SOLAR, customization follows a controlled framework that protects both your brand and our production quality.
What Customization Doesn't Mean
Customization does not mean uncontrolled changes or unstable configurations. We work with you to define specifications once, validate through samples, then maintain consistency through production.
Looking for a manufacturing partner for your private label energy storage brand?
Explore OEM and ODM Battery SolutionsConsistency Over Claims
Quality at RUEN SOLAR is managed through process discipline, not marketing slogans. We prioritize stability over shortcuts.
Quality Is a Process, Not a Promise
Your customers rely on stable, predictable performance from every unit you deliver. That's why our quality system focuses on consistency across batches, full traceability, and engineering sign-off before mass production begins.
100% Capacity & Functional Testing
Every unit undergoes full capacity verification and functional testing before leaving our facility.
Batch Traceability
QR-coded tracking enables complete traceability from cell selection through final assembly.
Engineering Sign-Off
Mass production only begins after engineering validation and formal approval.
Incoming Inspection
Cell-level verification before production
Aging Test
Thermal and cycling validation
QC Records
Consistent documentation per shipment
Pre-Shipment Report
Full inspection before delivery
Looking for quality-controlled energy storage systems you can trust?
View Certified Lithium Battery SystemsBuilt for Regulated Markets
Our systems are designed with global compliance in mind. We support documentation, traceability, and long-term compliance alignment.
IEC Standards
IEC 62619, IEC 62040 compliance for battery safety and performance, enabling access to European and global markets.
UL Compliance
UL-related compliance pathways for North American market access, including UL 1973 and UL 9540 considerations.
UN38.3 Certified
Full UN38.3 transportation testing for safe international shipping via air, sea, and ground transport.
More Than Certificates — Compliance Support
For buyers in regulated markets like the US, Australia, or government projects, we understand that certification is just the starting point. We support your compliance journey with:
Need IEC-certified or UL-compliant lithium battery solutions for your market?
Learn About Our Certification SupportClear Process, Lower Risk
A structured cooperation process protects both sides. Here's how we work with partners from inquiry to delivery.
Requirement
Discuss your needs and application
Engineering
System proposal and technical review
Sample
Pilot validation and testing
Certification
Documentation and compliance support
Production
Mass production with QC control
Delivery
Shipping and after-sales
Predictable Timelines
Clear milestones and realistic schedules you can plan around.
Transparent Communication
Regular updates at every stage — no surprises.
Risk Reduction
Sample validation before commitment to large orders.
Ready to Start the Conversation?
Clear processes protect both sides. Let's discuss your requirements and find the right path forward.
Discuss Your ESS Project CooperationLong-Term Over One-Time
We believe long-term cooperation requires shared responsibility. We work best with partners who think beyond the first shipment.
"We aim to be the manufacturer partners rely on when projects matter — not just when prices are lowest."
Many suppliers disappear when issues arise. At RUEN SOLAR, we define responsibility boundaries clearly upfront — and we stand behind what we commit. Our partnership approach is built on principles that protect both sides over the long term.
Clear Responsibility Boundaries
We define what's covered and what's not — before issues arise, not after.
Transparent Communication
When problems occur, we communicate openly and work toward solutions together.
Continuous Improvement
Field feedback drives product improvement — we learn from every project.
Repeat Supply Commitment
We're built for ongoing cooperation, not one-time transactions.
5-Year Warranty
Standard warranty with 10-year extended options
Technical Support
Remote troubleshooting and field support
Spare Parts
Long-term availability for replacement components
Dedicated Contact
Single point of contact for ongoing projects
Looking for a responsible ESS manufacturer who thinks beyond the first shipment?
Learn How We Support Global ESS PartnersReal Factory, Real Control
We invite you to see where quality is built. Our facility combines automated precision with rigorous human oversight to ensure every system meets project standards.
Want to verify our capabilities in person?
Schedule a Factory VisitPowered by Tier-1 Leaders
An energy storage system is only as reliable as its components. We partner with the world's leading material suppliers to guarantee safety and longevity.
World's #1 lithium cell manufacturer, providing Grade-A LFP cells for our premium residential series.
Top-tier prismatic cell supplier known for high cycle life (6000+) in our commercial energy storage solutions.
Automotive-grade BMS processors ensuring millisecond-level voltage monitoring and balancing.
High-current industrial connectors that prevent overheating and ensure secure, vibration-proof connections.
Upstream lithium supply stability ensuring we deliver consistent pricing even during market fluctuations.
Advanced thermal insulation and fire suppression materials integrated into our container ESS designs.
Power MOSFETs that maximize efficiency and reduce heat generation in our high-voltage systems.
Pre-tested communication protocols with leading global inverter brands for plug-and-play integration.
Building a brand requires trusted components.
Request Component DatasheetsTrusted by leaders
from various industries
Learn why professionals across 30+ countries trust Ruen Solar to power their business and complete their customer journeys.
"What sets RUEN apart is their system-level thinking. They ensured compatibility with our local inverters before production."
"Response speed was the deciding factor. Their engineers replied within hours for our tender, not days. That won us the project."
"The OEM process was structured and transparent. No chaos, just consistent delivery."
"RUEN stands behind their product. Zero field issues in 200+ residential installations so far."
"Finally, a factory that understands we need marketing support and documentation, not just hardware."
"Stable pricing and reliable lead times. A true partner for our supply chain."
Global Project Gallery
We have successfully delivered 800+ projects in 30 countries.
Start Your Project With UsReady to Upgrade Your Energy Storage Supply Chain?
Fill in the form below to book a technical consultation with our engineering team.
