Cephus:
A buck-boost xfr will NOT solve fluctuating voltage problems, and may/could cause additional bad situations. Dependent on the actual load of the circuit that the electronics are on, a good thing may be a "good" UPS unit.
As to the voltage problems, you, or someone, has to stabilize the gen output. In the 'old days', before 'electronics, the gas pumps had no desires for a good 'clean', stable power source, but today it's another story.
John
