Davies (53 from 25 balls) smashed six fours and a pair of maximums as the visitors racked up 205-5 from their 20 overs, the left-hander in the runs again after a half-century in Friday???s loss to Glamorgan as well as two recent County Championship tons.
Surrey then dismissed Essex, beaten by Hampshire in their Blast opener,??for 161,??with young pacemen Tom Curran (4-35), James Burke (3-23) and Matt Dunn (2-27) doing most of the damage.
Surrey???s Jason Roy (4) was run out early on by Essex skipper Ryan ten Doeschate ??? another low score for last term???s top Blast run getter following his tally of one against Glamorgan ??? but Davies and Kumar Sangakkara (38 from 21) then put on 80 for the second wicket in six overs.
Sangakkara was??removed by left-armer Reece Topley (1-52) after plundering three sixes and two fours, though Davies continued to motor, sharing a stand of 44 with Gary Wilson (41 from 34) before he was caught by Graham Napier looking for another big shot.
Zafar Ansari (31no from 21) impressed again, a day after creaming an unbeaten 67 from 32 deliveries, but Essex???s Australian quick Shaun Tait (0-26 from four overs) prevented the visitors from posting a bigger total.
Essex openers Nick Browne (7) and Dan Lawrence (3) were sent packing in Dunn???s first over, though,??meaning Greg Smith (44 from 35) and Kishen Velani (22 from 26) had to undertake a rebuilding job.
The middle-order men added 71 but when they were castled by Curran in the 12th over and Napier (6) and James Foster (9) failed to really contribute, Essex???s hopes of victory looked incredibly slim.
Ten Doeschate (40 from 19), however, biffed four fours and two sixes to keep the home fans believing but when he holed out to Surrey captain Gareth Batty, the Eagles soon??slumped to back-to-back T20 Blast defeats.