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- 5kW AC output sized for typical homes. The inverter delivers a rated output of 5,000W, covering the simultaneous loads of a typical small-to-medium household.
- Single-MPPT solar input. One PV input accepts up to 5,500W with a 120–500VDC working range, matching common residential rooftop arrays.
- Start small, expand later. The compact stack begins with one 5.12kWh module and grows to 25.6kWh (up to 5 modules) without changing the inverter.
- Grade A LiFePO4 cells. All-new Grade A LFP cells offer a 6,000-cycle service life at 90% DOD — dependable for daily charge and discharge.
- Certified for export. CE, FCC, UN38.3 and MSDS documentation, as shown in the product data sheet.
- Space-saving and easy to manage. The home-appliance style stack includes CAN/RS485/RS232 communication, optional Wi-Fi monitoring, and rollers for positioning.
The KINPOWER K-STACK is a 5kW solar energy storage system built around a compact, stackable lithium iron phosphate (LiFePO4) battery design. It starts at a single 5.12kWh module and scales up to 25.6kWh across five modules, giving small homes, first-time solar owners and space-constrained households a practical entry point into solar storage. All-new Grade A LFP cells provide a 6,000-cycle service life, and a built-in BMS delivers high-level safety protection. For a home that wants dependable backup without over-sizing the system, this 5kW solar energy storage system keeps the footprint small and the configuration simple.
Why Choose the K-STACK 5kW Compact Solar Energy Storage System
Models and Specifications
| Model | SMP-EU101-1 |
|---|---|
| Module Number | 1 PCS |
| Total Energy | 5.12kWh |
| Standard Voltage | 51.2V |
| Working Voltage | 43.2–57.6V |
| Discharge / Charge Current | 100A / 50A |
| DOD | 90% |
| PV Working Range | 120–500VDC |
| MPPT Range | 120–450VDC |
| PV Input Power | 5500W |
| Max PV Current | 22A |
| Max Charging Current | 30A |
| Rated Input Voltage | 220/230/240VAC |
| Input Voltage Range | UPS(170~280)VAC±2% / APL(90~280)VAC±2% |
| Max Bypass Current | 30A |
| Rated Output Voltage | 220/230/240VAC |
| Rated Output Power | 5000W |
| Total Product Dimension | 550×500×446mm |
| Communication | CAN/RS485/RS232/WiFi(Optional) |
| IP / Temp / Humidity | IP20 / 0–55℃ / −20–55℃ / ≤80% |
All standard configurations share a 51.2V low-voltage design, 90% DOD, IP20 protection, and the same 550×500×170mm module footprint.
A Compact Stackable Solar Battery That Grows With You
The thin-profile K-STACK starts at just one 5.12kWh module — a total product height of only 446mm — so it fits in tight utility spaces. When household needs grow, add 5.12kWh modules to reach 10.24kWh, 15.36kWh, 20.48kWh or 25.6kWh, with total heights up to 1126mm. Each module measures 550×500×170mm and weighs 46kg, and the series supports stacking up to 15 modules for future expansion.
How the 5kW System Powers a Small Home
During the day, the PV input charges the battery while powering loads. In the evening or during a grid outage, the system switches to battery mode with a 5,000W rated output — enough for lights, refrigerators, fans, TVs and other everyday appliances. For households adding storage for the first time, the 5.12kWh entry configuration provides a straightforward way to start storing solar energy and reducing grid draw.
