storagefaults.comstoragefaults.com

FranklinWH•aGate

Analysis by Marcus & Team

FranklinWH aGate Buzzing Sound During Backup

Troubleshoot a buzzing sound in your FranklinWH aGate during backup operation. Identify causes, solutions, prevention, and safety measures for residential ESS.

Frequently Asked Questions

•What is the typical lifespan of the aGate battery?

The FranklinWH aGate battery is designed for a lifespan of 10 years or more, depending on usage patterns and environmental conditions. Refer to the manufacturer's warranty for specific details.

•What are the recommended AC load limits for the aGate during backup?

Refer to the aGate's product specifications for the maximum continuous and surge power output ratings during backup operation. Exceeding these limits can damage the inverter.

•How do I access the FranklinWH installer portal?

Contact FranklinWH technical support to obtain access credentials and instructions for using the installer portal.

Related questions

Loading related questions...

Marcus leads the technical research department at Storage Faults. Together with a team of systems analysts, he specializes in translating complex solar storage error codes into actionable diagnostic steps for the US market.

← Back to list

What to Look For:

The FranklinWH aGate hybrid inverter emits a noticeable buzzing sound specifically during backup operation (grid outage). The sound may vary in intensity and pitch. Verify normal operation during grid-tied operation.

Important Warnings:

The FranklinWH aGate contains high-voltage DC components (up to 600V DC or higher). Incorrect handling can result in severe electric shock or arc flash. Only qualified electricians with proper training and personal protective equipment (PPE) should perform any troubleshooting or repair work. Always follow lockout/tagout procedures before working on the system. Ensure compliance with NEC Article 690 and 706.

Recommended Action:

1

Disconnect the AC input to the aGate by switching off the main breaker feeding the inverter. Engage rapid shutdown by verifying DC disconnect switch position.
2

Using a calibrated multimeter, verify zero voltage on both the AC input and DC input terminals of the aGate after shutdown procedures.
3

Inspect the inverter's exterior for any visible signs of damage or loose components. Do not open the inverter housing without proper authorization and training.
4

Use a clamp meter to measure the AC current being drawn from the aGate during backup operation. Compare this value to the inverter's rated output current.
5

Review the inverter's event logs through the monitoring app or installer portal for any error codes or warnings related to overloading or component failures. Note the timestamp of buzzing events.
6

Contact FranklinWH technical support with the fault description, measured values, and event log data for further assistance. Provide photos/videos of the buzzing.
7

A qualified electrician must perform internal component inspection and repair if authorized by FranklinWH, adhering to NEC 706.15.

How It Works:

The aGate inverter converts DC power from the battery to AC power for household use during grid outages. This involves high-frequency switching within the inverter's power electronics. The buzzing sound typically originates from components like inductors, transformers, or capacitors vibrating due to electromagnetic forces caused by these switching frequencies. The intensity of the buzzing is related to the power level being delivered and the efficiency of the DC/AC conversion process. Anti-islanding protection is engaged during backup, isolating the system from the grid.

Pro Tip:

Use the FranklinWH installer portal to access advanced diagnostic information, including real-time voltage and current readings for individual components. Check the DC bus voltage stability during backup operation, as fluctuations can indicate capacitor issues. The service menu (accessible with installer credentials) provides component-level diagnostic information and allows for forced firmware updates.

Why This Happens:

Loose component within the inverter housing vibrating at the switching frequency (e.g., inductor, capacitor).
Harmonic resonance within the inverter's internal circuitry causing audible noise.
Overloading the inverter during backup operation, leading to increased current draw and component stress.
Degradation of electrolytic capacitors in the DC bus or AC output filter, impacting filtering efficiency.
Issues with the inverter's internal cooling system causing components to overheat and vibrate.
Grid impedance issues that manifest only during islanded operation.

Maintenance Tips:

Regularly monitor the inverter's performance through the monitoring app, paying attention to any error codes or unusual behavior.
Ensure the inverter is installed in a well-ventilated area to prevent overheating. Keep vents clear of obstructions.
Periodically check for firmware updates and install them promptly to address potential software glitches or improve efficiency.
Avoid overloading the inverter during backup operation by carefully managing the connected loads.
Conduct annual system inspection by a qualified electrician, including visual inspection of components and testing of safety functions (e.g., rapid shutdown).
Ensure proper grounding and bonding of the system as per NEC 250.