Where do you get the idea that voltage drops are causing it? Do you guys have any data showing higher failure rate at apartment complexes and light commercial than houses?
They get 208Y/120v service and run the compressor on 208v.
There are 200v motors meant for 208v service and 230v motors for 240v, but most are 208/230 approved, so apartment complex condensing units are running dual rated compressors at 208v nominal.
Single houses get 120/240 and run on 240v.
Condensing units are almost always rated 208-230 and its a sure bet that 240v service seldom drop below 208v.