To begin safely with the HP-AHP20SA series inverters, adhere to the following sequence and precautions:

Connection Order:

• Ground the inverter/charger first.
• Connect the battery, ensuring the correct polarity.
• Attach the AC load, carefully checking connections.
• Connect PV modules, taking care of high voltage.
• Hook up Utility or Generator input.
• Add any optional accessories last.
• For disconnections, simply reverse this order.

Safety Precautions:

• Do not install in environments prone to humidity, salt spray, corrosion, grease, flammability, explosive materials, or dust accumulation.
• Disconnect all switches and breakers before starting any wiring activities.
• Choose appropriate wire and breaker sizes based on the model specifications and installation distances.
• Ensure tight and secure connections, using cable clamps to stabilize cables. Avoid opening or touching internal components of the inverter/charger; allow ten minutes for cooling down before any internal operations.
• Be cautious around high voltage areas, especially the PV input, utility input, and AC output connections.
• Do not touch the fan while it is operational to prevent injury.

Additional Considerations:

• Follow the correct installation steps, especially when handling batteries.
• Maintain sufficient clearance around the inverter/charger for heat dissipation.
• Properly ground the cabinet of inverter/charger but avoid grounding the battery, PV, or AC terminals.
• If using in areas with frequent lightning, install an external surge arrester.
• Test the generator before use due to potential complex output conditions.

Upon initial startup, double-check wire connections and proceed with setting parameters as per the manual.