Sumry SP Series Off-Grid Hybrid Solar Inverter Instruction Manual

Introduction

The Sumry SP series off-grid hybrid solar inverter is a versatile power solution designed to provide uninterruptible power. It integrates the functions of a solar inverter, MPPT solar charger, and battery charger into a compact unit. This manual provides essential information for the safe and efficient installation, operation, and maintenance of your inverter.

Key features include pure sine wave output, programmable supply priority, a high PV input voltage range (55-450VDC), and a built-in MPPT solar charger (80A for 3KW, 110A for 3.8KW & 6.2KW models). It is compatible with various battery types, including lithium-ion, and offers optional WiFi monitoring and BMS communication.

Figure 1: Sumry SP Series Inverter Overview with Power Ratings

Safety Information

• Read all instructions and cautionary markings on the unit and in this manual before installation and operation.
• Do not attempt to disassemble the unit. There are no user-serviceable parts inside.
• Ensure proper grounding of the inverter.
• All wiring must be performed by qualified personnel.
• Install the inverter in a well-ventilated area, away from flammable materials.
• This inverter must work with a battery. Ensure the battery is connected before connecting solar panels.
• Always ensure the PE protective conductor is grounded.

Installation

1. Pre-Installation Checklist

• Verify all components are present and undamaged.
• Ensure the installation location is suitable (well-ventilated, dry, away from direct sunlight, and within operating temperature range).
• Have appropriate circuit breakers ready as specified below.

2. Circuit Breaker Specifications

It is recommended to install circuit breakers in the following positions:

• Between the battery pack and the inverter battery input.
• Between the solar panel and the photovoltaic input of the inverter.
• Between the power input of the grid and the inverter.
• Between the inverter output and the load.

The circuit breaker effectively prevents misconnection or reverse connection of the mains input and inverter output. It also protects against short circuits, load short circuits, or overloads in the output.

Table 1: Recommended Circuit Breaker Specifications

3. Wiring and Connection Steps

1. Battery Connection:
   • Install a circuit breaker between the battery and the inverter.
   • Open the breaker.
   • Connect the battery to the inverter. (3KW/3.8KW models require 24V battery; 6.2KW model requires 48V battery).
   • Close the circuit breaker.
   • Measure the voltage on the battery side of the inverter to ensure it is normal.
2. PV Input Connection:
   • Install a circuit breaker between the PV input and the inverter.
   • Turn on the circuit breaker.
   • Ensure the battery voltage is normal.
   • Connect the solar panels to the inverter.
   • Close the circuit breaker between the PV input and the inverter. The inverter display should light up and start charging.
3. Inverter Startup:
   • Press the power button (usually located on the bottom right corner of the inverter) to start the machine.
   • Verify there is 220V/230V/240V AC voltage output from the inverter.
4. AC Input and Output Connection:
   • Install a circuit breaker between the AC input (utility/generator) and the inverter.
   • Install a circuit breaker between the inverter output and the loads.
   • Turn on the circuit breakers for both AC input and output.
   • Connect the inverter to the mains (utility/generator).
   • After 2 minutes, turn off the mains input circuit breaker, then turn off the inverter output circuit breaker. This completes the installation procedure.

Figure 2: Wires and Technical Specifications Diagram

4. Solar Panel Wiring Method

Proper wiring of solar panels is crucial for optimal performance and safety. Consider both series and parallel configurations based on your system's voltage and current requirements.

Figure 3: Solar Photovoltaic Panel Wiring Methods (Series/Parallel)

• Series Connection: Increases the system voltage. The total voltage must be less than the hybrid inverter's maximum PV input voltage (Voc/inverter). Example: 6 panels (41.92V/10.35A each) in series = 251.52V.
• Parallel Connection: Increases the system current. The total current should not exceed the maximum PV input current of the hybrid inverter. Example: 3 strings of 2 panels in parallel (41.92V/10.35A each) = 125.76V, 20.7A.
• PV Cable Dimensions: Recommended cable dimensions are 6-8A/mm².

Operating Instructions

1. Working Modes

The Sumry SP series inverter offers versatile working modes to optimize power management:

• Charging Modes:
  • Only Solar: Charges batteries exclusively from solar power.
  • Solar First: Prioritizes solar power for charging, using utility/generator only when solar is insufficient.
  • Mains & Solar: Charges batteries from both utility/generator and solar power simultaneously.
• Output Modes:
  • Solar First: Prioritizes solar power to supply loads.
  • SBU First: Prioritizes solar, then battery, then utility to supply loads.

Figure 4: Versatile Working Modes

2. LCD Display and Button Operation

The comprehensive LCD display allows user-configurable settings and easy access to operational data. Use the accessible buttons to navigate menus and adjust parameters such as battery charging current, AC/solar charger priority, and acceptable input voltage ranges.

3. Power Flow Diagrams

The inverter can supply power to loads even during power failures, acting as a hybrid system that mixes solar, battery, and utility power.

Figure 5: Solar System Connection and Operation

• Operation with battery connected, Solar Power and AC Power available: Solar modules, utility grid, and battery packs all contribute to powering home appliances.
• Solar Power and AC Power not available: Battery packs and a generator (if connected) supply power to home appliances.

Important: This inverter must work with a battery. Ensure it is connected to a battery before connecting solar panels.

4. Monitoring and Control (Optional WiFi)

For enhanced monitoring and control, an optional WiFi module is available. This allows you to monitor and manage your inverter via a smartphone app (available on App Store/Google Play).

Figure 6: Monitor and Control via Smart App (Optional WiFi)

The inverter has a single communication port (COMM port). You can choose to communicate via the WiFi module or the battery BMS, but only one method can be used at a time. If using a WiFi module, it must be purchased separately.

Maintenance

• Regular Cleaning: Keep the inverter's exterior clean and free from dust. The intelligent fan speed adjustment and built-in anti-dust kit (optional) help maintain optimal performance in harsh environments.
• Ventilation: Ensure the inverter's ventilation openings are not blocked to allow for strong heat dissipation and prevent overheating.
• Connection Checks: Periodically inspect all wiring connections for tightness and signs of corrosion.
• Battery Health: Monitor battery charge levels and overall health, as the smart battery charge design optimizes battery life.
• Firmware Updates: Check for any available firmware updates through the monitoring app (if WiFi module is used) to ensure optimal performance and access to new features.

Figure 7: Strong Heat Dissipation

Troubleshooting

This section provides general troubleshooting tips. For complex issues, contact customer support.

• No Power Output:
  • Check all circuit breakers (battery, PV, AC input, AC output) to ensure they are closed.
  • Verify battery voltage is within the normal operating range.
  • Ensure the inverter is powered on.
  • Check for overload or short circuit protection activation (the inverter has built-in protection).
• No Solar Charging:
  • Confirm solar panels are correctly wired and connected.
  • Check PV input voltage range (55-450VDC) is met.
  • Ensure the PV input circuit breaker is closed.
  • Verify sufficient sunlight is available.
• Inverter Overheating:
  • Check for blocked ventilation openings.
  • Ensure the ambient temperature is within the operating range (-10°C to 55°C).
  • Reduce load if continuously operating at maximum capacity.
• Communication Issues (WiFi/BMS):
  • Ensure only one communication method (WiFi or BMS) is active at the COMM port.
  • For WiFi, check module connection and app settings.
  • For BMS, ensure the battery's communication protocol (PACE or PYLONTECH) is compatible.

Specifications

The Sumry SP series offers various models with different power ratings. Below is a detailed specification table.

Figure 8: Product Data Sheet

Table 2: Detailed Technical Specifications

Other Specifications:

• Output Current: 80A
• Output Type: SINGLE
• Certification: CE
• Voltage: 220V-240V
• Selectable Voltage Range: 90-280VAC for home appliances
• Wave form: Pure sine wave
• Battery maximum charge current: 80A
• Maximium efficiency: 98%
• Work without battery: No, it must work with battery
• Inverter feature: Off grid
• Feature 3: hybrid solar inverter
• Is Smart Device: Yes

User Tips

• Battery Compatibility: The inverter is compatible with a wide range of batteries including Flooded (FLD), Gel, Lithium-iron phosphate (LI), Lithium-ion (LI), AGM/Sealed (SLD), and user-custom batteries. Ensure your battery type is correctly configured in the inverter settings.


Figure 9: Compatible Battery Types

• Appliance Compatibility: The inverter can power a variety of household and office loads, including refrigerators, lamps, televisions, fans, and air conditioning units.


Figure 10: Diversified Uses with Various Appliances

• Power Outage Protection: The inverter is designed to deliver emergency AC power to devices with a transfer time less than 20ms, minimizing disruption during power outages.


Figure 11: Protection Against Power Outages

Warranty and Support

For warranty claims, technical support, or service inquiries, please contact your original point of purchase or the manufacturer directly. Ensure you have your product model number and purchase details available.

The manufacturer, SUMRY, is a highly-rated and popular brand known for low returns, indicating reliable product quality and customer satisfaction.