Hanchu HESS-OF-E-3.5K1 3.5 kW 24 V Inverter

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The Hanchu HESS-OF-E-3.5K1 is a reliable and efficient 3.5 kW off-grid inverter, engineered for residential and light commercial installations. As the go-to brand for Pacific Solar Technologies, Hanchu is fully supported with after-sales service, deep local expertise, and nationwide distribution in South Africa.

Warranty:

• 2-year warranty when paired with any third-party lithium battery
• 5-year extended warranty when paired with an official Pacific or Hanchu lithium battery

Key Features & Technical Specifications

Inverter

• Model: HESS-OF-E-3.5K1
• Capacity: 3.5 KVA / 3.5 kW (off-grid hybrid)
• Parallel Capability: No
• Input Voltage: 230 VAC
• Input Voltage Range:
• 170-280 VAC (for personal computers)
• 90-280 VAC (for appliances)
• Input Frequency: 50/60 Hz (auto-sensing)
• Output Voltage: 220/230 VAC 5%
• Output Frequency: 50/60 Hz
• Surge Power: 7000 VA
• Waveform: Pure Sine Wave
• Transfer Time:
• 10 ms (PCs)
• 20 ms (appliances)
• Peak Efficiency (PV inverter): 96%
• Battery inverter Efficiency: 93%
• Overload Protection:
• 5 s @ >140 % load
• 10 s @ 110-140 % load
• Crest Factor: 3:1
• Admissible Power Factor: 0.6-1 (inductive/capacitive loads)

Battery Compatibility

• Nominal Voltage: 24 VDC
• Floating Charge Voltage: 27 VDC
• Overcharge Protection: 33 VDC
• Charging Method: CC / CV
• Lithium Battery Activation: Yes (via PV)
• Battery Communication: RS-485

Solar & AC Charging

• Charger Type: MPPT
• Max PV Array Power: 4000 W
• Max PV Open-Circuit Voltage: 500 VDC
• MPPT Voltage Range: 60-500 VDC
• Max Solar Input Current: 15 A
• Max Solar Charge Current: 100 A
• Max AC Charge Current: 80 A
• Max Combined Charge (PV + AC): 100 A

Physical Dimensions

• Unit Dimensions (L×W×H): 358 × 295 × 105 mm
• Package Dimensions: 465 × 350 × 175 mm
• Net Weight: 7.0 kg
• Communication Interfaces: RS-232 & RS-485

Environmental Specifications

• Operating Temperature: -10 C to + 50 C
• Storage Temperature: -15 C to + 50 C
• Humidity Tolerance: 5-95 % (non-condensing)

Note: This is a stand-alone off-grid inverter-it is not designed to feed electricity back into the utility grid. Ideal for solar-battery setups, backup power, and remote installations.

What's in the box
1 x Inverter
1 x Manual
1 x Cabling