Random VM guest OS restart and "Display config is not supported." when client Mojave on battery power

Client H/W - Mid-2012 15" 1680x1050 non-retina MacBookPro9,1

Client OS - Mojave 10.14.6

Fusion 11.1.1

Guest OS - WinXP Pro 32

This never happens when connected to 120VAC, only on battery power

and happens when Fusion/WinXP in Single Window view or Unity view.

Start Fusion/WinXP in Single Window

Login WinXP

cmd/shift/U for Unity view

Fusion/WinXP idle after login/unity

Doing nothing or browsing in Chrome 76.0.3809.132

Then... Random black screen for 5-10 seconds

Fusion/WinXP comes back in a black/play button Single Window with a

Fusion error msg window "Display configuration is not supported." over the Fusion/WinXP Single Window.

Clear the error msg, then click the play button in the Single Window and

WinXP restarts "Restoring VM state" back to Single Window.

Any thoughts would be greatly appreciated!