Interesting video. Here's a couple of assumptions that you may need to consider. 1. You're assuming maximun output of the panels all the time 2. You are assuming that the panels will not get damaged, and lose efficiency in the future. 3. You are assuming that the efficiency loss the company is providing is correct. One good hail storm can wipe out your panels in a matter of minutes. That will put you back on the grid in a hurry and having a 30 year warranty won't help you.
Good points but 1) We don't use solar panel max wattage in calculations .. Instead the solar designers use solar design software that uses data from nearest weather station, solar panel specs , inverter specs, roof orientation, roof angle etc...2) Actually the solar software we account for annual solar degradation. The reduced production is accounted for in the calculations... BTW usually 2-3% loss first yr then .5% or less annually .. Most solar panels guarantee by 25yrs 80%-92% of original output --depending on brand. 3) Actually most high quality solar panels updergo hail testing 1" diameter and wind load testing ... Solar panels use a high quality tempered glass pretty tough can survive small hail ... but if get big softball hail well it's not going to survive that ... That size wull damage everything roofs , cars , etc. That dosnt happen often but if it does then it's home insurance claim ...
Ground mount is an option .. however need to have ground space .. most homes in city or suburbs don't want to use up whole backyard for solar .... also ground mount adds about $.50 to $.65/watt ... on a 10kw $5000-6500 . thanks for watching and commenting.
