i've done our '3' houses ... all with sunpower.. 1st house is with their 327;s, the other two with 335's - all with solaredge equipment - all have a 25year bumper to bumper warr... which is great... provided they are in bizz in 25yrs - over the 7years we have had em, we have had a few of the solaredge optimizers crap out , and all replaced without cost to us... and the panels do lose some power over time, but its hard to gauge... for instance nov and dec of 2020 have produced better then nov and dec of 2015- its all a question of the weather...