u/PresentationSad2034

Yesterday, the ambient temperature in Northern Virginia was about 93 degrees Fahrenheit. After mowing our front yard Lymow returned to the dock to recharge; however, despite a valiant effort it didn’t charge… finally sending an E51 error. After checking everything suggested, nothing helped.
Research revealed that the BMS (battery management system) will not allow charging the battery if too hot or too cold. Unfortunately the error message doesn’t mention anything about the temperature. After sitting in the dock overnight, and temperatures dropping, the Lymow charged and was ready to go in the morning.

Don’t panic! Just be aware that summer temperatures can delay recharge.