ROCKSOLAR 20kWh-61.44kWh High Voltage Outdoor LiFePO4 Battery System (DC UL9540 Certified)

ROCKSOLAR R Series 20kWh–61.44kWh High Voltage LiFePO4 Battery System

What it does: High-voltage, large-capacity energy storage for residential, commercial, and industrial solar systems — pairs with hybrid inverters for backup power, solar self-consumption, and microgrid applications.

The battery alone has DC UL 9540 certificate so you do not need to worry to pair with a particular model inverter to meet UL9540 requirements.

Key specs:

• Capacity: 20kWh–61.44kWh
• Chemistry: LiFePO4 | Voltage range: 204.8V–614.4V
• Cycle life: 6,500+
• Expansion: up to 32 units in parallel
• Installation: floor-standing modular cabinet
• IP 65
• Working Temperature: -20C - +55C

Built for: Whole-home backup, commercial ESS, industrial energy storage, solar battery systems, microgrids, demand charge reduction, off-grid projects

Why it matters:

• High-voltage architecture (up to 614.4V) = lower current losses, better inverter efficiency, lower balance-of-system costs
• 6,500+ cycles = long service life with minimal degradation
• Integrated BMS = overcharge, over-discharge, overcurrent, temperature protection, and cell balancing
• Modular cabinet design = easy expansion, professional install, simplified maintenance
• Scalable up to 32 units = grows from residential to large commercial scale

Certifications: UL1973, UL9540, UL9540A — meets North American safety standards

Why DC UL 9540 certification matters to you

You will have the freedom of choice to choose the most popular inverters when planning your system.

Warranty: 10 years

• Shipping: Orders are processed within 1–2 business days. Standard delivery takes 3–7 business days depending on your location.
• Returns: You may return or exchange products within 30 days of receiving your order. Items must be in original condition with proof of purchase.
• If your item is defective or damaged due to manufacturing issues, we’ll gladly replace it at no additional cost.