, the battery is fully charged and the unit has switched to "Maintain" mode. Error Codes & Troubleshooting

: The display will show "FUL" when the battery is fully charged. Always disconnect the AC power first, then the black clamp, and finally the red clamp. Troubleshooting Common Fault Codes

: Use the "Mode" button to select your battery type (e.g., Lead-Acid, AGM, GEL).

The interface of the EverStart 6811a is simple. Here is what every light and button does according to the 2021 manual.