Growatt ARK Battery Low Voltage – Troubleshooting &... | solardiagnostics.org

Technical Background:

The inverter relies on the battery to maintain a stable voltage output for optimal system performance. When the battery voltage falls below a certain threshold, typically due to self-discharge during storage, the inverter triggers a low voltage fault. This is often detected through the battery management system (BMS), which monitors voltage levels and can also perform insulation resistance (RISO) measurements to ensure safety. If the battery voltage is too low, the inverter will disconnect from the battery to prevent damage and maintain system integrity.

Symptoms:

Users may observe a blinking red LED on the Growatt ARK battery, indicating a low voltage condition. The monitoring app may display alerts regarding battery status, including warnings of insufficient voltage. Additionally, there may be a noticeable drop in system performance or energy production due to the battery's inability to supply adequate power.

Possible Causes:

Insufficient charge due to prolonged inactivity of the Growatt ARK battery, leading to self-discharge below the minimum voltage threshold.
Faulty battery management system (BMS) calibration, causing incorrect voltage readings and triggering low voltage alerts.
Damaged or corroded connections at the junction box or battery terminals, leading to increased resistance and voltage drop.
Environmental factors such as extreme temperatures during storage, affecting battery chemistry and performance.
Inadequate storage conditions, such as high humidity or exposure to moisture, potentially leading to internal short circuits.
Age-related degradation of battery cells, which can occur even during storage if the battery is not properly maintained.

Solution:

1

Use a multimeter to measure the voltage at the battery terminals. Confirm that the voltage is indeed below the manufacturer's specified minimum.
2

Inspect all connections, including those at the junction box and battery terminals, for corrosion or damage. Clean or replace as necessary.
3

Verify the battery management system (BMS) status through the Growatt monitoring app or display. Ensure it is functioning properly and has the latest firmware updates.
4

If the voltage is critically low, connect the battery to a compatible charger to bring it back to the nominal voltage level, ensuring to follow the manufacturer’s charging guidelines.
5

After charging, recheck the voltage and BMS status to confirm the battery is operational.
6

If issues persist, consult the Growatt technical support for diagnostics or consider replacing the battery if it shows signs of significant degradation.
7

Document all findings and repairs for future reference and warranty purposes.

Safety Warning:

Always ensure that maintenance and troubleshooting are performed by a licensed electrician or certified solar installer to adhere to safety standards and local electrical codes.

Prevention:

To avoid low voltage issues in the future, ensure that the Growatt ARK battery is stored in a controlled environment, ideally at temperatures between 32°F and 77°F (0°C to 25°C). Regularly check the battery's voltage and condition every few months, even during periods of inactivity. Additionally, consider using a maintenance charger to keep the battery topped off during extended storage periods.

Frequently Asked Questions

•What causes low voltage in Growatt ARK batteries?

Low voltage in Growatt ARK batteries can occur due to prolonged storage without charging, leading to battery depletion. It's essential to maintain proper charge levels during storage.

•How can I prevent low voltage issues in the future?

To prevent low voltage issues, regularly check and charge the battery during storage. Ensure the battery is stored in a suitable environment to maintain optimal performance.

Growatt ARK Battery Low Voltage – Troubleshooting & Technical Fix Guide

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Frequently Asked Questions

•What causes low voltage in Growatt ARK batteries?

•How can I prevent low voltage issues in the future?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention: