






RoyPow Off-Grid Energy Storage System
10Years Warranty
20Years of Design Life
16 Units Flexible Capacity Expansion
Easy Installation: Wall Mounted
Intelligent BMS:Multiple Safe Protections
High Compatibility:Compatible with Many Brands of Inverters
5.12Kwh LiFePO4 Battery
- Our Lithium Iron Phosphate (LiFePO4) Batteries are engineered for optimal off-grid energy storage, offering high-performance, reliability, and long-lasting durability. Each module delivers 5kW of maximum continuous discharge power, providing consistent and dependable energy for your off-grid applications, whether for residential, commercial, or industrial use.
- With the flexibility to expand your system capacity by adding up to 16 units, these batteries can easily grow with your energy needs, ensuring scalable and future-proof energy storage.
- Designed for superior longevity, our batteries boast an impressive cycle life of over 6,000 cycles, guaranteeing they will provide years of uninterrupted service. Plus, with a 10-year warranty, you can have full confidence in the long-term value and performance of your investment.
- Perfect for sustainable energy solutions, our LiFePO4 batteries ensure your off-grid systems run smoothly and efficiently for many years to come.

Flexible Capacity Expansion
- Meet specific residential electricity usage requirements with scalable energy storage. The system starts with a standard capacity of 5.1 kWh and can be expanded up to a maximum capacity of 81.6 kWh, ensuring adaptability to varying household energy demands.

Intelligent BMS Monitoring & Management
- The advanced Battery Management System (BMS) continuously monitors and optimizes battery performance, enhancing efficiency, safety, and longevity. With real-time diagnostics and intelligent control, the system ensures stable operation and maximized energy output.

6KW Off-Grid Inverter
- Experience reliable and efficient off-grid energy storage with our advanced off-grid inverter. Designed for durability, it boasts a 10-year lifespan with a 3-year warranty, ensuring long-term performance and peace of mind. Installation is effortless—set up quickly and power up in no time.

intelligent management
- With intelligent management features, you can easily monitor system status through the LCD display or mobile app, providing real-time control and convenience at your fingertips.
Off-grid Energy Storage System
An off-grid energy storage system works by capturing and storing electricity for use when it's needed, without relying on the power grid.
- Step 1. Energy Generation – Solar panels or wind turbines generate electricity from sunlight or wind.
- Step 2. Energy Storage – The electricity is stored in batteries for later use, especially at night or when power generation is low.
- Step 3. Power Conversion – An off-grid inverter converts the stored DC (direct current) power from the batteries into AC (alternating current) power, which is used by household appliances.
- Step 4. Energy Management – A Battery Management System (BMS) monitors battery health and ensures efficient energy use.
This system provides a reliable, independent power supply, making it ideal for remote areas or backup power needs.

System Specification | |
Model | RBmax5.1L-F |
Electric Data |
|
Nominal Energy (kWh) | 5.12 |
Usable Energy (kWh) | 4.79 |
Cell Type | LFP (LiFePO4) |
Nominal Voltage (V) | 51.2 |
Operating Voltage Range (V) | 44.8 ~ 56.8 |
Max. Continuous Charge Current (A) | 100 |
Max. Continuous Discharge Current (A) | 100 |
General Data | |
Weight (Kg / lbs.) | 48 Kg / 105.8 lbs. |
Dimensions (W × D × H) (mm / inch) | 500 x 167 x 490 mm / 19.69 x 6.57 x 19.29 inch |
Operating Temperature (°C) | 0 ~ 55℃ (32 ~ 131℉) (Charge), -20 ~ 55℃ (4 ~ 131℉) (Discharge) |
Storage Temperature (°C) Delivery SOC State (20~40%) |
>1 Month: 0 ~ 35℃ (32 ~ 95℉); ≤1 Month: -20 ~ 45℃ (-4 ~ 113℉) |
Relative Humidity | ≤ 95% |
Max. Altitude (m) | 4000 m / 13,123 ft (>2,000 m / >6,561.68 ft derating) |
Protection Degree | IP 20 |
Installation Location | Ground-Mounted; Wall-Mounted |
Communication | CAN, RS485 |
Certification | EM,CE,Transportation,UN38.3 |
Warranty | |
Warranty (Years) | 5 Years |
System Specification | |
PV (DC Input) | |
Recommended Max. PV Input Power | 6000W |
Max. Input Voltage (VOC) | 500V |
MPPT Operating Voltage Range | 85V-450V (@75V Start up) |
Number of MPPT | 1 |
Max. Number of Input Strings per MPPT | 1 |
Max. Input Current per MPPT | 27A |
Max. Short-circuit Current per MPPT | 35A |
Grid (AC Input) | |
Max. Input Power | 11500W |
Max. Input Current | 50A |
Rated Grid Voltage | 220 / 230 / 240Vac |
Rated Grid Frequency | 50 / 60Hz |
Acceptable Range | 170-280Vac (For UPS); 90-280Vac (For Home Appliances) |
Battery (Bi-direction) | |
Battery Type | LiFePO4 / Lead-acid |
Battery Voltage Range | 40-60Vdc |
Rated Battery Voltage | 48Vdc |
Max. Charge / Discharge Current | 120A / 130A |
BMS Communication Mode | RS485 |
Efficiency | |
Peak Efficiency | 0.98 |
Max. MPPT Efficiency | 0.999 |
Backup Output (AC Output) | |
Rated Output Power | 6000W / 6000VA |
Rated Output Current | 27.3A |
Rated Output Voltage / Frequency | 220 / 230 / 240Vac 50 / 60Hz |
Parallel Capacity | Max. 12 Units |
Surge Power | 12000VA 5s |
THDv (@ Linear Load) | <3% |
Switch Time | 10ms Typical (For UPS), 20ms Typical (For Home Appliances) |
Protection | |
Inner Protection | Output Short-circuit Protection, Output Overvoltage Protection |
Surge Protection | PV: Type III, AC: Type III |
IP Rating | IP54 |
General Specifications | |
Operating Temperature Range | -10℃~55℃ |
Relative Humidity Range | 5%~95% |
Max. Operating Altitude | >2000m Derating |
Standby Self-consumption | <10W |
Installation Type | Wall-mounted |
Cooling Mode | Fan Cooling |
Communication | RS232/RS485/Dry Contact/Wi-Fi |
Display | LCD |
Mechnical Specifications | |
Inverter Dimension (L x W x H) | 346.6 x 120 x 444.7 mm |
Shipping Dimension | 560 x 465 x 240mm |
Net Weight | 12.4kg |
Gross Weight | 14.6kg |
Warranty Period | 3 Years |
In general, the order will be shipped within 24 hours after the payment is successful. If there is another condition, we will notify the customer by email.
USA Shipment from the CA or GA warehouse. The order won't be shipped on Saturday and Sunday, and orders placed on Saturday and Sunday will be shipped on next Monday.
Shipping fee
FREE shipping on all orders. All our shipping for products will be a door-to-door service with local UPS or FedEx delivery company.
Destinations
If you are concerned with shipping, please also check the free shipping area above picture. For some certain places, we might not deliver or need extra shipping.
Roypow offers free shipping within the continental U.S. For USA shipment we do not ship to Hawaii, Alaska, Puerto Rico, Overseas Islands.
Orders with multiple items may be shipped in separate packages to speed up delivery.
Tips for shipping
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Roypow is doing its best to make the promised time, please understand our warehouse is working only on business days, so please remember to enjoy the day even if there's a difference in the ETA. By the way, we will inform you proactively if something is wrong.
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You may please fill in the phone number. For a multi-hundred USD Battery, deserve a phone number for some urgent calls?
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Feel free to reach out to us at service@roypowcell.com.