GRANKIA ESS-3.6K5LV-US is a 3600W output solar energy battery storage system combining a 5.12kWh LiFePO4 battery, 4.5kW PV input, MPPT solar charging, and pure sine wave inverter technology. Designed for residential backup and off-grid applications, it delivers efficient renewable energy storage with intelligent monitoring and reliable 120V power output.
Ideal for residential users, small off-grid homes, RV applications, emergency backup, and distributed energy systems requiring reliable 120V AC power.
Compact Solar Energy Battery Storage for Reliable Home Power
Grid instability, electricity cost increases, and renewable energy demand drive household interest in on-site power reserves.
The ESS-3.6K5LV-US solar energy battery storage system combines an inverter, a lithium battery pack, and an energy management controller in one enclosure.
Conventional systems require separate batteries, chargers, and inverters with external wiring. This integrated unit reduces installation steps and removes compatibility mismatches between components.
With a 3.6kW rated output power, 5.12kWh LiFePO4 battery capacity, and 4.5kW maximum PV input, it provides a practical solution for homes, cabins, RV energy systems, and emergency backup applications.
Product Architecture and Core Technology
All-in-One Energy Storage Design
The ESS-3.6K5LV-US combines four functional components:
- Pure sine wave solar inverter
- LiFePO4 battery pack
- MPPT solar charge controller
- Battery management system (BMS)
This single-enclosure layout eliminates external cabling between discrete devices.
You will gain:
- Shorter installation time
- Floor space reduction
- Pre-verified component coordination
- Single-point maintenance access
For users evaluating a 5kWh lithium battery solar storage system, this configuration delivers a measured balance of stored energy and available output.
Solar Energy Conversion
The solar energy battery storage system accepts PV array power up to 4.5kW.
The MPPT charger tracks the array’s maximum power point and adjusts the operating voltage to match panel output under changing irradiance.
| Parameter | ESS-3.6K5LV-US Specification | User Benefit |
| Maximum PV Array Power | 4.5kW | Supports medium-size residential solar systems |
| MPPT Technology | Single MPPT | Optimized solar charging control |
| Maximum PV Open Circuit Voltage | 300VDC | Compatible with high-voltage PV strings |
| MPPT Operating Range | 90VDC – 260VDC | Maintains efficient solar tracking |
| Maximum Solar Charge Current | 80A | Faster battery charging |
The MPPT controller captures solar energy and directs it to the internal battery.
Key Features & Benefits
Integrated 3.6kW Pure Sine Wave Hybrid Solar Inverter
ESS-3.6K5LV-US uses a high-efficiency inverter with:
- 3600W rated output power
- 7200W surge capability
- Pure sine wave output
- 110V/120V AC compatibility
Pure sine wave output matches utility-grade electricity.
You will operate:
- Computers
- Communication equipment
- Medical devices
- Home appliances
Users can operate critical equipment safely during grid failures.
The system supplies backup power without an external inverter.
LiFePO4 Battery Chemistry, 5.12kWh Capacity
The unit uses a 16S1P LiFePO4 cell configuration rated at 51.2VDC, 100Ah, for a nominal capacity of 5.12kWh.
LiFePO4 chemistry maintains thermal stability. Cycle life: ≥6000 cycles at 80% depth of discharge. This exceeds lead-acid alternatives by approximately three times.
You will obtain a decade of daily cycling before meaningful capacity fade, lowering the effective cost per kWh stored over the system’s lifetime. This makes the platform a durable residential solar energy battery storage system rather than a short-lifespan buffer.
Battery Performance and Energy Management
Advanced Lithium Battery Protection
The battery management system monitors:
- Voltage
- Current
- Temperature
- Charging status
- Discharging condition
Multiple protection functions include:
| Protection Function | Description |
| Overcharge Protection | Prevents excessive charging voltage |
| Over-discharge Protection | Protects battery lifespan |
| Overcurrent Protection | Prevents abnormal current conditions |
| Over-temperature Protection | Improves operational safety |
| Short Circuit Protection | Provides electrical protection |
LiFePO4 chemistry plus BMS logic reduces safety risks during routine operation.
Long-Life Energy Storage Performance
Battery durability is a key factor in solar energy storage applications.
| Battery Type | Typical Cycle Life | Maintenance | Usable Energy |
| Lead-Acid Battery | 500-1500 cycles | High | Medium |
| AGM Battery | 800-2000 cycles | Medium | Medium |
| ESS-3.6K5LV-US LiFePO4 | ≥6000 cycles | Low | High |
Longer cycle life reduces replacement frequency. You will lower total ownership cost over 10+ years.
Pure Sine Wave Output with Fast Transfer
The ESS-3.6K5LV-US matches North American residential electrical standards: 120VAC, 60Hz (50Hz auto-detect also available).
Rated output is 3.6kW (7.2kW surge), delivered as a pure sine wave with a transfer time of 10ms for PC loads and 20ms for home appliances.
Sensitive electronics and motor-driven devices operate without waveform clipping or phase distortion.
This supports a genuine solar energy battery storage for home backup use case, keeping refrigerators, routers, and medical devices online during outages.
Flexible Charging Modes
The system supports multiple charging strategies:
- Solar First
- Utility First
- Hybrid Charging
The system automatically prioritizes free solar energy while falling back to grid or generator power when PV output is insufficient.
Maximum charging capability:
| Charging Source | Maximum Current |
| Solar Charging | 80A |
| AC Charging | 20A |
| Combined Charging | 80A |
You will prioritize renewable energy while retaining backup charging from utility or generator.
Users maintain continuous power availability without manually managing energy sources, which is critical for an off-grid energy storage setup in remote locations.
Comprehensive Protection and Connectivity
The system integrates reverse polarity, overvoltage, overcurrent, over-temperature, and short-circuit protection across PV, AC, and battery circuits, plus RS485, Bluetooth, and WiFi connectivity.
When a fault occurs, the system isolates the affected circuit and logs the event. You will monitor remotely via app or web portal. You will obtain diagnostic data without visiting the unit.
Technical Specifications
| Category | Specification |
| Model | ESS-3.6K5LV-US |
| Phase | Single-Phase In / Single-Phase Out |
| Rated Output Power | 3.6kW |
| Battery Capacity | 5.12kWh |
| Battery Chemistry | LiFePO4 |
| PV Input Power | 4.5kW |
| MPPT Range | 90–260 VDC |
| System Voltage | 51.2VDC |
| Output Voltage | 110VAC / 120VAC |
| Frequency | 50/60 Hz (auto-detect) |
| Surge Power | 7.2kW |
| MPPT Current | 27A |
| Max. Solar Charge Current | 80A |
| Cycle Life | ≥6000 cycles @ 80% DoD |
| Protection Rating | IP20 Indoor |
| Communication | WiFi / Bluetooth / RS485 |
| Dimensions (D×W×H) | 450 × 280 × 705 mm |
| Net Weight | 60 Kg |
| IP Rating | IP20 (indoor) |
Product Details
Application
The ESS-3.6K5LV-US is designed for distributed energy applications where reliable electricity, compact installation, and renewable energy utilization are important.
Residential Solar Backup Power
Households require stable power for lighting, communication, refrigeration, security, and home electronics.
The ESS-3.6K5LV-US provides:
- 3.6kW continuous AC output
- 7.2kW surge power capability
- 5.12kWh lithium battery storage
- 10ms transfer time for computer loads
During daytime:
- PV panels generate DC power.
- MPPT controller regulates charging.
- Battery stores excess energy.
Night or grid outage operation:
- Battery discharges to inverter.
- Inverter supplies AC loads.
- Transfer switch engages within 10–20ms.
You will obtain an integrated residential solar battery storage system with inverter for grid-independent operation.
Off-Grid Cabins and Remote Power Systems
Remote locations often face challenges such as:
- Limited grid access
- Expensive electrical infrastructure
- Unstable power supply
The ESS-3.6K5LV-US solves these problems through:
- Solar-first charging mode
- Generator input support
- Battery backup capability
- Intelligent power management
Typical applications include:
- Remote cabins
- Farm buildings
- Small workshops
- Remote monitoring stations
RV and Mobile Energy Applications
The compact design makes the system suitable for mobile energy solutions.
With dimensions of:
450 × 280 × 705 mm
and a weight of:
60kg
the ESS-3.6K5LV-US provides high energy density in a compact enclosure.
RV users can power:
- Refrigerators
- Air conditioners
- Lighting systems
- Entertainment devices
- Communication equipment
For users searching for a portable 3600W solar generator with LiFePO4 battery, this system provides higher integration and longer service life than traditional portable power stations.
Intelligent Monitoring and Connectivity
Smart Energy Management Platform
The ESS-3.6K5LV-US supports:
- WiFi communication
- Bluetooth monitoring
- RS485 communication
- App monitoring
- Web portal access
Users can check:
- Solar production
- Battery state of charge
- Charging status
- Output power
- System alarms
This enables real-time energy management without requiring professional equipment.
Flexible External Connections
The system provides multiple output interfaces:
AC Output
- 1 × 30A circuit connector
- 3 × NEMA 5-15R receptacles
DC Output
- USB-A: 18W × 4
- USB-C: 100W × 1
- USB-C: 60W × 1
- 12V cigarette socket: 120W
- 12V DC ports: 120W × 2
These interfaces allow direct connection of household and mobile electronic devices.
