Solar Inverter Installation Guide

This solar inverter installation guide provides a step-by-step technical reference for installing Anern solar inverters, including off-grid, hybrid solar inverter, MPPT solar inverter, low-frequency solar inverter, and parallel inverter systems.

It is designed for professional installers, EPC contractors, system integrators, and technical teams, and covers safety requirements, wiring connections, battery integration, and commissioning procedures commonly used in residential and small commercial solar power systems.

This guide focuses on standard installation practices to support safe operation, stable system performance, and long-term reliability.

1. Safety Requirements Before Installation

Before installing any solar inverter, ensure the following safety conditions are met:

• Installation must be performed by qualified and trained personnel

• Disconnect all AC and DC power sources before installation or maintenance

• Follow local electrical codes and regulations

• Never connect PV, battery, or AC wiring while the inverter is powered ON

• Use insulated tools and appropriate personal protective equipment (PPE)

• Proper safety preparation reduces the risk of electric shock, equipment damage, and system failure.

2. Unpacking and Initial Inspection

After receiving the inverter:

• Inspect the outer packaging for damage

• Check the inverter housing for visible defects

Verify all accessories are included:

• Wall-mounting bracket

• Mounting screws

• Communication cables (if applicable)

• User manual and documentation

• Do not install the inverter if physical damage is found.

3. Installation Environment Requirements

The inverter installation location must meet the following conditions:

• Indoor or sheltered area (protected from rain and direct sunlight)

• Solid, non-flammable wall (concrete or brick recommended)
  
  

Well-ventilated environment

• Minimum clearance: ≥ 30 cm on all sides

• Ambient temperature range: –10°C to 50°C

• Avoid areas with high humidity, corrosive gases, or dust accumulation

Correct installation environment directly affects inverter lifespan and performance.

4. Mounting the Solar Inverter

To mount the inverter:

• Use the supplied wall-mounting bracket

• Drill mounting holes according to bracket dimensions

• Secure the bracket with expansion bolts

• Hang the inverter vertically on the bracket

• Ensure the inverter is firmly fixed and level

• Remove the bottom cover before electrical wiring

• Vertical installation supports proper heat dissipation.

5. Grounding (Earthing) Connection

Proper grounding is mandatory for safety and surge protection.

• Connect the inverter grounding terminal to a reliable earth ground

• Use grounding cable size according to local electrical standards

• Ensure low grounding resistance

Incorrect grounding may cause electric shock or equipment damage.

6. AC Input and AC Output Wiring

When connecting AC wiring:

Install an external AC circuit breaker between the grid and inverter

Confirm correct wiring polarity:

• L (Line): Brown or Black

• N (Neutral): Blue

• PE (Earth): Green/Yellow

• Do not confuse AC input and AC output terminals

• Select cable size based on inverter rated power

• Tighten all terminal screws securely

Improper AC wiring may cause inverter malfunction or protection shutdown.

7. PV (Solar Panel) Connection

For photovoltaic input wiring:

• Install a DC circuit breaker between PV array and inverter

• Verify PV open-circuit voltage does not exceed inverter maximum rating

Connect:

• PV+ → PV+ terminal

• PV− → PV− terminal

• Use properly rated DC cables and insulated tools

• Complete PV wiring before powering ON the inverter

Always double-check PV polarity to avoid inverter damage.

8. Battery Connection

8.1 Lead-Acid Battery Connection

• Ensure battery voltage matches inverter specifications

• Install a DC breaker or fuse between battery and inverter

• Connect BAT+ and BAT− correctly

• Recommended battery capacity: ≥ 200Ah for stable system operation

8.2 Lithium Battery Connection

• Confirm lithium battery protocol compatibility

• Connect battery power cables first

• Connect BMS communication cable (RS485 or CAN)

• Select battery type in inverter settings before startup

• Correct battery configuration ensures accurate charging and protection.

9. Parallel Inverter Installation (If Applicable)

For parallel systems:

• Use identical inverter models

• Follow master–slave configuration rules

• Ensure battery cables are equal length

• Connect parallel communication cables correctly

• Configure parallel parameters before powering ON

• Parallel installation must follow manufacturer specifications strictly.

10. Communication and Monitoring Setup (Optional)

If supported:

• Insert Wi-Fi or GPRS communication module

• Secure communication cable connections

• Configure system monitoring via mobile APP or web platform

• Monitoring enables real-time system status and fault detection.

11. Final Inspection Before Power ON

Before starting the inverter, confirm:

• All wiring connections are secure

• Grounding is completed

• AC and DC breakers are OFF

• Bottom cover is reinstalled correctly

12. Power ON Sequence

Follow the correct startup sequence:

• Turn ON battery breaker

• Turn ON inverter power switch

• Turn ON PV breaker

• Turn ON AC input breaker

• Check LCD display and system status

Incorrect startup order may trigger system protection.

13. Operation and Maintenance Notes

• Keep ventilation openings clean

• Inspect wiring and terminals periodically

• Do not overload the inverter

• For long-term shutdown, disconnect PV, battery, and AC power

• Regular inspection improves system reliability and service life.

  
  

To check solar inverter maintenance guide.