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| Specification Attribute | Technical Detail |
| Brand | Smarten |
| Series / Range | Helio Inbuilt Lithium MPPT Solar PCU Series |
| Model / Item Designation | HELIO 2500 (2500VA / 25.6V / 100Ah LiFePO4) |
| Product Type | All-in-One Wall-Mount Pure Sine Wave MPPT Solar PCU with Inbuilt Lithium Battery |
| Generic / Common Name | 2500VA Lithium Solar Inverter / 2.56 kWh LiFePO4 Solar PCU / Wall-Mount Solar Power Station |
| Inverter Rating / Output Capacity | 2500 VA (2.5 kVA) / 24V Class |
| Nominal System DC Voltage | 25.6 V DC |
| Battery Chemistry | Lithium Ferro Phosphate (LiFePO4 / Li-ion) |
| Battery Capacity & Stored Energy | 100 Ah @ 25.6V | 2.56 kWh (2560 Wh) |
| Output Waveform | DSP-Based Pure Sine Wave (≤ 5% THD) |
| Output Voltage & Regulation | 220V AC ± 10% | 50 Hz |
| Solar Charge Controller | Built-in Advanced MPPT (Maximum Power Point Tracking) |
| Charging Sources | Dual Charging: Solar PV Array and AC Utility Grid |
| Grid Charging Control | Front Switch / Keypad Selectable Mains Charging Enable / Disable |
| UPS Transfer Time | Less than 10 milliseconds (< 10 ms UPS Mode) / < 20 ms WUPS Mode |
| Peak System Efficiency | Greater than 93% (> 93%) |
| Display Interface | Multi-Parameter Digital LCD Screen (Real-Time Battery, Solar & Load Monitoring) |
| Deep Discharge Recovery | Integrated Recovery Circuitry for Deeply Discharged Cells |
| Mounting & Form Factor | Compact Wall-Mount Enclosure (Floor-Mount Compatible) |
| Target Power Systems | Modern Duplex Homes, Commercial Showrooms, Healthcare Clinics & Offices Across Nepal |
| Best Used For | Inverter ACs, Water Pumps, Refrigerators, Wi-Fi Systems, Desktop PCs & Complete Solar Power Backup |
Inbuilt 100Ah (2.56 kWh) LiFePO4 Lithium Battery: High-capacity Lithium Ferro Phosphate storage pack is completely enclosed inside the unit, eliminating messy external wiring, operating acid-free and fume-free, and offering long cycle life with zero water maintenance.
High-Efficiency Inbuilt MPPT Solar Controller: Advanced Maximum Power Point Tracking controller extracts up to 30% more solar yield than PWM units, maximizing daily generation from connected solar arrays even during overcast periods.
Heavy-Duty 2500VA DSP Pure Sine Wave Engine: Delivers clean, undistorted 220V AC electricity (≤ 5% THD) to effortlessly power heavy inductive appliances—including inverter air conditioners, refrigerators, water pumps, and electronics—without motor humming or overheating.
Dual Charging Sources with Grid-Saving Control: Seamlessly combines solar array harvesting and utility grid input, featuring user-configurable grid-charging enable/disable controls to prioritize renewable solar power and cut electricity expenses.
Under 10ms UPS Transfer & Wall-Mount Chassis: Provides seamless changeover in less than 10 milliseconds to prevent sensitive computers and servers from restarting, housed in an aesthetic, space-saving wall-mount enclosure with an LCD telemetry screen.