This document describes the HESP Series Solar Hybrid Inverter, an all-in-one device that integrates solar energy storage, mains charging, and AC sine wave output. It is designed for high response speed, reliability, and industrial standards, utilizing DSP control and advanced control algorithms.
Function Description
The HESP Series Solar Hybrid Inverter serves as the energy conversion unit for a complete solar power system. It can convert light energy from PV modules into DC power to charge batteries or directly invert it into AC power to drive loads. It also supports charging the battery from mains or a generator while powering the load. When solar energy is insufficient and mains are not connected, the battery and PV module power the load.
The inverter offers four charging modes:
- Only Solar: Prioritizes PV charging, with no mains charging initiated. This is the most energy-efficient mode, suitable for regions with good daylighting conditions.
- Mains Priority: Prioritizes charging from Mains Power. PV power charging starts only when the mains fail.
- Solar Priority: Prioritizes charging from PV. Mains charging starts only when PV fails or the battery voltage is below a set value. This mode fully utilizes solar energy during the day and switches to mains charging to maintain battery levels, ideal for stable grids with expensive feed-in tariffs.
- Mains & Solar Hybrid Charging: Prioritizes PV MPPT charging and supplements with Mains Power if PV energy is insufficient. Mains charging stops when PV energy is sufficient. This mode offers fast charging and is suitable for unstable grid areas, ensuring sufficient backup power at all times.
The inverter also provides two output modes:
- Inverter Output: PV and battery power the load. When Solar First Mode is selected, green solar energy use is maximized. It switches to Mains Power if PV fails. This mode maximizes solar energy use while maintaining battery power, suitable for relatively stable power grids.
- Mains Bypass: The inverter switches to inverter power supply only when Mains Power fails, acting as a backup UPS, suitable for regions with unstable power grids.
- Inverter First: Switches to Mains Power supply only when the battery is under-voltage. This mode maximizes the use of DC energy and is used in regions with stable power grids.
- Hybrid Output and Grid Connection: In utility bypass state, if no battery is connected or the battery is full, the load power is supplied by both PV and utility when the hybrid function is enabled. Surplus PV energy is fed back to the grid if the grid connection function is enabled.
Important Technical Specifications
The HESP4860S100-H model has the following key specifications:
Parallel Mode:
- Permitted parallel units: 1-6
AC Mode:
- Rated input voltage: 220/230Vac
- Input voltage range: (170Vac~280Vac) ±2% or (90Vac~280Vac) ±2%
- Frequency: 50Hz/ 60Hz (Auto detection)
- Frequency Range: 47±0.3Hz~55±0.3Hz (50Hz); 57±0.3Hz~65±0.3Hz (60Hz)
- Overload/short circuit protection: Circuit breaker
- Efficiency: >95%
- Conversion time (bypass and inverter): 10ms (typical)
- AC reverse protection: Available
- Maximum bypass overload current: 40A
Inverter Mode:
- Output voltage waveform: Pure sine wave
- Rated output power (VA): 6000
- Rated output power (W): 6000
- Power factor: 1
- Rated output voltage (Vac): 230Vac
- Output voltage error: ±5%
- Output frequency range (Hz): 50Hz ± 0.3Hz (50Hz); 60Hz ± 0.3Hz (60Hz)
- Maximum Efficiency: >92%
- Overload protection:
- (102% < load <125%) ±10%: report error and turn off output after 5 minutes
- (125% < load < 150%) ±10%: report error and turn off output after 10 seconds
- Load >150% ±10%: report error and turn off output after 5 seconds
- Peak power: 12000VA
- Loaded motor capability: 4HP
- Rated battery input voltage: 48V (Minimum starting voltage 44V)
- Battery voltage range: Undervoltage alarm/shutdown voltage/overvoltage alarm/overvoltage recovery... (settable on LCD screen)
- Power saving mode self-consumption: Non-ECO mode ≤100W; ECO mode ≤50W
AC Output (Grid):
- Rated Output Power (W): 6000W
- Max. apparent power (VA): 6000VA
- Max. output current (A): 26A
- THDI: <3%
- Rated voltage (V): 230Vac
- Frequency: 50Hz/60Hz
AC Charging:
- Battery type: Lead acid or lithium battery
- Maximum charge current (can be set): 0-60A
- Charge current error: ± 5Adc
- Charge voltage range: 40-58Vdc
- Short circuit protection: Circuit breaker and blown fuse
- Circuit breaker specifications: 40A
- Overcharge protection: Alarm and turn off charging after 1 minute
PV Charging:
- Maximum PV open circuit voltage: 500Vdc
- PV operating voltage range: 120-500Vdc
- MPPT voltage range: 120-450Vdc
- Battery voltage range: 40-58Vdc
- Maximum PV input power: 6600W
- Maximum PV input current: 22A
- PV charging current range (can be set): 100A
- Charging short circuit protection: Blown fuse
- Wiring protection: Reverse polarity protection
Hybrid Charging Max Charger Current (AC charger+PV charger):
- Max charger current (can be set): 100A
Certified Specifications:
- Certification: CE(IEC62109-1)
- EMC certification level: EN61000
- Operating temperature range: -25°C~55°C (>45°C derating)
- Storage temperature range: -25°C~60°C
- Humidity range: 0% to 100%
- Noise: ≤60dB
- IP rate: IP65
- Heat dissipation: Forced air cooling, variable speed of fan
- Communication interface: USB/RS485 (WiFi/GPRS)/CAN/Dry contact Control
- Dimension (LWD): 556mm345mm182mm
- Weight: 19.2kg
Usage Features
- LCD Screen and LED Indicators: Designed with an LCD screen and 3 LED indicators for dynamic display of system data and operating status. The LCD screen allows real-time data viewing and parameter setup.
- Touch Buttons: Features touch buttons for menu navigation, option increase/decrease, and selection confirmation.
- Time Slot Control: Allows setting priorities for using mains and battery according to local peak and valley tariffs.
- Power Saving Mode: Available to reduce no-load loss.
- Intelligent Variable Speed Fan: Efficiently dissipates heat and extends system life.
- Battery Compatibility: Supports lithium battery activation by PV solar or mains, and is compatible with both lead-acid and lithium batteries.
- Comprehensive Protections: Includes short circuit protection, over voltage and under voltage protection, overload protection, reverse protection, PV night reverse-current protection, mains input over/under voltage protection, battery over/low voltage protection, heat sink over temperature protection, PV reverse polarity protection, AC reverse protection, bypass overcurrent protection, battery input overcurrent protection, battery input protection, charge short protection, CAN communication loss protection, parallel connection error protection, parallel battery voltage difference protection, parallel AC voltage difference protection, parallel current sharing fault protection, and synchronization signal fault protection.
- Parallel Operation: Up to six units can be connected in parallel for increased capacity, supporting both single-phase and three-phase configurations.
- Communication Ports:
- RS485: Two ports (RS485-1 and RS485-2) for direct communication with a host computer for monitoring and parameter setting, or for connection to WiFi/GPRS communication modules for mobile APP control.
- CAN: For connecting lithium battery communication.
- USB: For USB communication with optional PC host software, requiring a "USB to serial chip CH340T driver".
- Dry Contact: Can control the ON/OFF of a diesel generator to charge the battery, with terminals for Normally Closed (NC-N) and Normally Open (NO-N) points.
Maintenance Features
- Regular Checks: Recommended to conduct checks twice a year to ensure optimal long-term performance.
- Ensure unobstructed airflow around the unit and remove dirt/debris from the heat sink.
- Inspect exposed wires for damage (sunlight, friction, insects, rodents) and repair/replace as needed.
- Verify consistency of indications and displays with device operation, addressing any faults or errors.
- Check wiring terminals for corrosion, insulation damage, signs of high temperature/burning/discoloration, and tighten screws.
- Inspect for dirt, nesting insects, and corrosion, and clean as required.
- Replace failed arresters promptly to prevent lightning damage.
- Safety Precautions: Emphasizes disconnecting all power supplies and ensuring capacitors are discharged before any checks or operations to prevent electric shock.
- Troubleshooting Guide: Provides a fault code table with corresponding remedies for various issues, such as battery undervoltage, overcurrent, fan failure, overload, and communication errors.
- Installation Precautions: Detailed instructions for safe installation, including wearing safety goggles, avoiding metal objects near batteries, ensuring good ventilation, leaving space for heat dissipation, and proper wiring to prevent damage and ensure safety.
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