Bluetti EP760 code 21
What it means: An insulation fault on the PV3 array. The manual associates it with a possible short between the solar array and ground.
What to do
Check the insulation resistor between solar array and grounding for a short circuit.
When to call service
The manual lists steps the owner can take. If the code comes back after them, or you are unsure, contact an authorized service dealer. A warning: the unit may keep running, but the cause needs attention.
Source: official Bluetti manual, page 72, read . Summary of the manual, not a reproduction.
Models this manual covers
Other EP760 codes
Questions
What does Bluetti code 21 mean?
An insulation fault on the PV3 array. The manual associates it with a possible short between the solar array and ground. (Bluetti manual for the EP760, page 72.)
How do I fix Bluetti code 21?
Check the insulation resistor between solar array and grounding for a short circuit.
Fuel, gas and electrical work on a home battery is for qualified technicians; follow the safety section of the manual. All 18 EP760 codes →