Live in NE down an isolated road,, tired of losing power 10-15 days a year, decided to get high quality propane generator to run the whole, big house in case of (frequent) outage,, installer came highly recommended. Buried 500 gallon tank, big job. I was present with him at first start up, it made a whining, oscillating sound that installer told me did not sound quite right, he said the gas valve probably needed adjustment, left me with distinct impression it was no biggie, just fine tuning, didn't hear from him about it again, he parried my constant emails, as essentially 'no biggie'. A few days later was the freak October snow, lost power for four days. Generator ran the house, but whining sound got louder and I noticed light bulbs brightness oscillating with the sound. I called factory tech help for the generator, they told me it was a major problem, oscillation meant voltage surge that could destroy my appliances. Now, my installer says it is a defective control panel, covered under factory warranty he can't replace it for weeks, but don't worry he measured voltage oscillation, it is no more than 10%, so OK to leave generator on line while waiting for new panel. My questions:
-- it is OK to leave generator online to kick in during possible outage while waiting for control panel fix, or could voltage surge dangerously?
-- is leaving it online going to void my warranty?
-- are my applicances, HVAC or house electrical systems possibly already damaged due to four days of running off the oscillaing generator?
-- can I trust my installer at all after this? (now i worry he cut corners or misled me about other aspecgt of the job, including propane pipes under active driveway?
sorry for the long winded post.