Soldato
- Joined
- 4 Aug 2007
- Posts
- 22,432
- Location
- Wilds of suffolk
Problem is if 1 micro-inverter on your roof dies, you either ignore it and have less panels, or you have the pain of getting scaffold up again and replacing it, which has a cost as well.
Unless you need them I'd avoid micro-inverters on domestic personally.
Yes exactly, unless you have a heavily compromised array micro inverters will never pay back and raise the likelihood of failure significantly.
The only time I would add them is if going for an in roof panel solution which means the microinverters are able to be changed from inside.
Either cutting the membrane or I have seen some vids of them pushing them through the membrane where they overlap and fixing to roof itself (inside loft)
I was considering them for mine since I was listed as 5% shading. I can see the impact of this shading on my generation, it affects 5-10 minutes thats all. Deffo the right decision.
When I looked into it people (installers) were claiming about 5% failure rate in years 10-15. With 14 panels I would be almost certain statistically to have a failure in that time.
What do you do then when the first fails, replace them all, or just the failed one etc.
When inverters and micro inverters are responsible for the majority of solar failures then IMO keeping that as simple as possible makes most sense.
As many videos will demonstrate the benefit is very minor on a non compromised system.
Half cell, multiple bypass diodes etc have reduced most of the benefits. The benefits do still exist but they are much reduced unless big shading issues.