Frequently Asked Questions

Yuegu New Energy manufactures a comprehensive range of LiFePO4 home energy storage systems including:

• Wall-Mounted Battery Packs: 25.6V/51.2V models from 2.5kWh to 15kWh capacity
• Mobile Battery Systems: Wheeled units from 15kWh to 30kWh with easy portability
• Stackable Battery Packs: Modular 51.2V systems supporting up to 15 units in parallel
• All-in-One Systems: Integrated battery + inverter solutions from 2.5kWh to 15kWh
• Tower Type Systems: Compact vertical designs for space-efficient installations

All systems feature 6000+ cycle life, multiple communication interfaces (RS232/RS485/CAN/WiFi/Bluetooth), and comprehensive protection functions.

LiFePO4 batteries offer significant advantages over other battery chemistries:

• Safety: Most stable lithium chemistry with no thermal runaway risk
• Longevity: 6000+ cycles at 80% DOD compared to 2000-3000 for other types
• Temperature Tolerance: Operates reliably from -20°C to 60°C
• Environmental: Non-toxic, recyclable materials without heavy metals
• Performance: Consistent voltage output, high discharge rates (up to 200A)
• Cost-Effective: Lower lifetime cost due to extended cycle life

25.6V Systems (8S configuration):

• Nominal voltage: 25.6V (24V system compatibility)
• Best for: Smaller residential systems, RV/marine, backup power
• Capacity range: 100Ah-200Ah (2.5kWh-5kWh)
• Advantages: Lower cost, compatible with 24V inverters and solar controllers

51.2V Systems (16S configuration):

• Nominal voltage: 51.2V (48V system compatibility)
• Best for: Larger residential/commercial, grid-tie systems, high power applications
• Capacity range: 100Ah-600Ah (5kWh-30kWh)
• Advantages: Higher power output, better efficiency, industry standard for home storage

Most modern residential solar systems use 48V (51.2V) configuration for optimal performance and compatibility with high-power inverters.

Yes! Most Yuegu battery systems support parallel connection for scalable capacity:

• Wall-Mounted & Mobile Systems: Up to 15 units can be connected in parallel
• Stackable Systems: Designed specifically for parallel operation with vertical stacking up to 6 units
• All-in-One Systems: Select models support up to 9 units in parallel (e.g., YG10-6.2KW)

Parallel connection requires proper BMS communication setup (CAN/RS485) to ensure balanced charging/discharging across all units. Our technical team provides complete configuration guidance.

All Yuegu LiFePO4 batteries are rated for 6000+ cycles at 80% Depth of Discharge (DOD) while maintaining ≥80% of original capacity.

What this means in real usage:

• Daily cycling: 6000 cycles = 16+ years of daily use
• Seasonal cycling: Used during peak rate hours or winter months = 20+ years
• Backup power: Occasional discharge during outages = 30+ years

Cycle life is verified through accelerated testing per IEC 62620 standards. Actual lifespan depends on operating temperature, charge/discharge rates, and maintenance practices.

Standard Operating Range: -20°C to +60°C

Performance by Temperature:

• Optimal (15°C-35°C): 100% rated capacity and performance
• Cold (-20°C to 0°C): Slightly reduced capacity (85-95%), BMS prevents charging below freezing until cells warm up
• Hot (40°C-60°C): Full capacity maintained, advanced thermal management prevents overheating

Built-in heating elements (optional) enable charging in sub-zero temperatures. Advanced BMS monitors cell temperatures and adjusts charge/discharge rates for safety and longevity.

Latin America Climate Suitability: Yuegu batteries excel in diverse climates from high-altitude Andes cold (-20°C) to tropical coastal heat (+45°C).

Yuegu batteries feature comprehensive communication options for seamless integration:

• RS232: Point-to-point serial communication for direct inverter connection
• RS485: Multi-drop bus communication for parallel battery systems
• CAN Bus: Industry-standard protocol compatible with major inverter brands (Victron, SMA, Growatt, etc.)
• WiFi (optional): Wireless monitoring via smartphone app
• Bluetooth (optional): Local connection for configuration and monitoring

The intelligent BMS broadcasts real-time data including SOC (State of Charge), voltage, current, temperature, cycle count, and fault codes. Compatible with major monitoring platforms and home energy management systems.

Yuegu batteries are designed for broad compatibility with major inverter brands through standard communication protocols (CAN/RS485/RS232).

Confirmed Compatible Brands (partial list):

• Victron Energy (Venus OS compatible)
• SMA Solar Technology
• Growatt
• Deye/Sunsynk
• GoodWe
• Sol-Ark
• Schneider Electric
• Studer Innotec

Voltage Compatibility: Match battery voltage to inverter DC input—use 25.6V batteries with 24V inverters, 51.2V batteries with 48V inverters.

For specific compatibility confirmation or custom communication protocol development, contact our technical team with your inverter model details.

Yes, professional installation by certified electricians is strongly recommended and may be required by local regulations.

Why Professional Installation Matters:

• Safety: High-voltage DC systems (up to 58.4V) require proper handling and connection techniques
• Code Compliance: Must meet local electrical codes and utility interconnection requirements
• System Integration: Proper communication setup between battery, inverter, and solar panels
• Warranty: Professional installation documentation may be required for warranty claims
• Optimization: Correct sizing, placement, and configuration for maximum performance

We provide comprehensive installation manuals, wiring diagrams, and technical support. For B2B partners, we offer installer training programs and certification.

Space requirements vary by battery configuration:

Wall-Mounted Systems:

• 2.5kWh-5kWh: ~500-650mm W × 400-585mm H × 150-160mm D
• 10kWh-15kWh: ~650-800mm W × 420-560mm H × 160-185mm D
• Requires solid wall mounting (concrete, brick, wood studs)
• Minimum clearance: 300mm sides, 500mm top/bottom for ventilation

Mobile/Wheeled Systems:

• Floor space: ~700-900mm W × 400-550mm D × 500-700mm H
• Wheeled design allows flexible placement and repositioning

Environmental Requirements:

• Indoor or weatherproof enclosure
• Temperature: -20°C to +60°C ambient
• Humidity: ≤95% non-condensing
• Altitude: ≤4000m above sea level
• Avoid direct sunlight, moisture, corrosive gases

Outdoor installation requires a weatherproof enclosure with appropriate IP rating (IP65 or higher recommended).

While Yuegu batteries have robust metal casings, they are not designed for direct weather exposure. For outdoor installations:

• Required: NEMA 3R or higher rated enclosure with ventilation
• Temperature Management: Ensure enclosure doesn't trap excessive heat (>60°C)
• Moisture Protection: Sealed cable entries, drainage for condensation
• Shade Recommended: Avoid direct sun to prevent overheating
• Altitude Consideration: UV-resistant enclosures for high-altitude installations

Many Latin American regions have ideal conditions for covered outdoor installations (e.g., under eaves, in carports, protected patios). Contact us for enclosure recommendations.

Standard Package Includes:

• Power cables: DC output cables with appropriate gauge (typically 16mm² or larger)
• Communication cables: RS232/RS485/CAN connection cables (varies by model)
• Mounting hardware: Wall brackets, screws, anchors for wall-mounted units
• User manual: Installation guide, wiring diagrams, technical specifications

Not Typically Included (site-specific):

• Long-distance cable runs (customer/installer provides based on layout)
• Fuse/breaker protection (should be installed per local electrical code)
• Conduit/cable management (varies by installation environment)
• Weatherproof enclosures for outdoor installation

We can provide complete cable kits and accessories for OEM/ODM orders. Custom configurations available for distributors and large projects.

Flexible MOQ based on order type:

• Stock Models (Standard Configuration): 10-20 units per model depending on capacity
• OEM/ODM Orders: 50-100 units for customized products (logo, packaging, specifications)
• Sample Orders: 1-2 units available for evaluation (at sample pricing)
• Container Orders: Discounted pricing for full 20ft/40ft container shipments

As a top 5 Chinese manufacturer with factory-direct pricing, we offer competitive rates even for smaller distributors. MOQ negotiable based on long-term partnership potential.

Yes! Comprehensive OEM/ODM services are available:

OEM Customization (Your Brand):

• Custom logo on battery case, inverter faceplate, and LCD display
• Branded packaging with your company information
• Custom user manuals in your language
• Private labeling for complete white-label solutions

ODM Engineering (Custom Design):

• Modified capacity configurations (different cell combinations)
• Custom voltage outputs (24V, 48V, 72V, etc.)
• Specialized communication protocols for unique inverter compatibility
• Modified enclosure dimensions and mounting options
• Integration with your existing energy management platform
• Custom BMS programming for specific use cases

Development Process: Consultation → Technical feasibility study → Prototype (30-45 days) → Testing/validation → Production (MOQ applies).

Our experienced R&D team works closely with partners to develop products tailored to regional market needs and regulatory requirements.

Flexible payment terms based on order value and partnership status:

New Customers:

• 30% deposit upon order confirmation
• 70% balance before shipment
• Payment methods: T/T (bank transfer), L/C (letter of credit)

Established Partners (after 3+ successful orders):

• 30-50-20 terms: 30% deposit, 50% before shipment, 20% within 30 days of delivery
• Net 30/60 terms available for qualified distributors with strong credit

Large Projects (>$100,000 USD):

• Milestone-based payments aligned with production and delivery schedule
• Performance guarantees available

We understand the importance of favorable payment terms for distributors' cash flow. Terms are negotiable based on order history, business plan, and market references.

Production Lead Times:

• Stock Models: 7-15 days for quantities under 50 units
• Large Orders (50-200 units): 20-30 days depending on model mix
• OEM Orders (custom branding): 25-35 days including packaging preparation
• ODM Orders (custom design): 45-60 days after prototype approval

Shipping Times to Latin America:

• Sea Freight: 30-45 days to major ports (Santos, Buenos Aires, Callao, Valparaíso, etc.)
• Air Freight: 7-10 days (for urgent small shipments, higher cost)
• Express (DHL/FedEx): 5-7 days (samples only, very expensive)

Total Timeline Example: Order placed → 20 days production → 35 days sea freight → 5 days customs clearance = ~60 days door-to-door delivery

We provide real-time production updates and shipment tracking. Rush orders may be accommodated with expedited production fees.

Standard Warranty Coverage:

• Battery Cells & BMS: 10 years or 6000 cycles, whichever comes first
• Inverter (All-in-One Models): 5 years from installation date
• Accessories & Cables: 2 years

Warranty Performance Guarantee:

• Battery capacity ≥80% after 10 years / 6000 cycles
• Covers defects in materials and workmanship
• Free repair or replacement of defective components

Extended Warranty Options: 15-year extended warranty available for additional fee (5-8% of product cost).

Full warranty terms, exclusions, and claim procedures detailed in our Warranty Policy page. Professional installation documentation required for warranty activation.

Warranty Claim Process:

1. Contact Technical Support: Email charles@yvalleyenergy.com or WhatsApp +86 131 0672 8908 with:
   • Product model and serial number
   • Purchase date and invoice/order number
   • Detailed problem description with photos/videos
   • Installation date and installer information
2. Technical Diagnosis: Our team will diagnose the issue remotely (via monitoring data, photos) and provide troubleshooting guidance.
3. Warranty Approval: If covered under warranty, we'll issue RMA (Return Merchandise Authorization) and arrange replacement parts shipment.
4. Part Replacement: Defective components shipped to your location (or local distributor) within 7-15 days. Installation by qualified technician required.
5. Claim Closure: Defective part returned for analysis. Warranty documentation updated.

Average Resolution Time: 15-25 days from initial contact to replacement installation (varies by location and part availability).

Comprehensive Technical Support:

• Email Support: charles@yvalleyenergy.com (response within 24 hours)
• WhatsApp Support: +86 131 0672 8908 (for urgent technical issues)
• Installation Guidance: Wiring diagrams, configuration assistance, commissioning support
• Troubleshooting: Remote diagnostics via monitoring data analysis
• Software Updates: BMS firmware updates when available
• Compatibility Assistance: Help integrating with inverters, solar controllers, monitoring systems

For B2B Partners:

• Dedicated account manager for ongoing support
• Installer training programs (online and on-site available)
• Technical documentation library (installation videos, troubleshooting guides)
• Spare parts inventory recommendations and fast-track ordering

Support provided in English, Spanish, and Portuguese to serve the Latin American market effectively.