snarley wrote:
Three of us bought these in Mazatlan and spliced them into our 30 amp extension cords. We also learned that here is a small single turn pot on the circuit board so we could adjust the switching points as ours seemed to switch about 108 rather than 110v. Otherwise , I can confirrn that when you add a heavy load at 115 v, the voltage drops for an instant and then boosts to 120. Highly recommend this for Mexican electrical systems.
It is GREAT to find out about this! Ours would not switch enough or fast enough to allow our heat pump (AC) to start. The voltage dropped too much so that the inverter kicked in to allow the compressor to start then reverted to the line voltage. This hard use eventually killed the inverter (Xantrex prosine 2.0) We're not in Mexico this season but I'll try that in the fall.