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What's the max generation you've seen for a 16.2kWh system at any given time?
- Thread starter njhtran
- Start date
So, my system size is 53.3% the size of yours., and my production is 56.1% of yours. The 2.8% difference seems like it would be explained by roof pitch, sun angle at your home vs mine, etc.
Interested to see what so cal dave is at but from this very limited sample size it would look like your system daily production is ok. FWIW the highest I have ever seen on my system peak input is like 7.1 and thats with the cloud edge effect. Its normally around 6.3 on a clear day (during june / july) that is not that hot but no clouds. My 8.7kW system generates around 11.5 to 13kW a year, depending.
EDIT: I also have zero clipping on my system (changed pics to thumbnails in respect for those browsing on mobile)
Interested to see what so cal dave is at but from this very limited sample size it would look like your system daily production is ok. FWIW the highest I have ever seen on my system peak input is like 7.1 and thats with the cloud edge effect. Its normally around 6.3 on a clear day (during june / july) that is not that hot but no clouds. My 8.7kW system generates around 11.5 to 13kW a year, depending.
EDIT: I also have zero clipping on my system (changed pics to thumbnails in respect for those browsing on mobile)
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Sure, no problem. If you want to compare notes again sometime, feel free to drop me a PM and you can spot check against a neighbor
SoCal Dave
Member
Date =9/21
System Size = 12.24kW
Highest peak generation shown =8.1kW (66.2% of full system)
Solar generated today =51.5 kWh (4.2kWh per system size kW)
Location - Central Temecula
SoCal Dave
Member
Jjrandorin - 35.4kWh / 8.7kW = 4.06kWh / system KW (96% of my system)
Dave - 51.5 kWh / 12.24kW = 4.2kWh / system kW
njhtran - 63.1kWh / 16.23kW = 3.89kWh / system kW (92% of my system)
So the amount of power produced per size of our systems varies a bit. Mine is producing the most and njhtran is the least. It could be factors such as panel orientation.
The interesting thing is my panels are facing everywhere, so I wouldn't have expected mine to be the highest.
Dave - 51.5 kWh / 12.24kW = 4.2kWh / system kW
njhtran - 63.1kWh / 16.23kW = 3.89kWh / system kW (92% of my system)
So the amount of power produced per size of our systems varies a bit. Mine is producing the most and njhtran is the least. It could be factors such as panel orientation.
The interesting thing is my panels are facing everywhere, so I wouldn't have expected mine to be the highest.
@SoCal Dave 's system is 75% as large as @njhtran and production is 81.6% production, so 6.6% different, but he is in central temecula. Still within the right margins, at least it seems like it to me. Thanks for posting!
So are mine, lol, and I have the oldest panels. I actually have 34 panels on my roof. If they were in todays panels I would have a lot higher production
It looks like those numbers are all pretty close to each other. As I recall from the beginning of this thread @njhtran has a significant number of his panels facing north, so it would make sense that his system was producing a bit less than the other ones, assuming they have a more optimal panel orientation.
SoCal Dave
Member
So are mine, lol, and I have the oldest panels. I actually have 34 panels on my roof. If they were in todays panels I would have a lot higher production
Yah, mine has 36 panels. So if you had the latest 340W panels I got, you would be my system size.
SoCal Dave
Member
I have some facing east, west, north, south. I think I also might have some facing downwards
Thats actually VERY helpful... I was considering trying to negotiate with tesla to get out of this solar lease early next year (when I can buy the system out), but I wanted to see if I could negotiate them letting me out of it to purchase a larger system. Ideally, they could simply take off what I have, and mount new ones on the same mounting (that I know is water tight at this point, no leaks in over 5 years and plenty of rain).
No idea if that is possible but I was going to ask, lol. Its helpful to know what system size I would be looking at.
SoCal Dave
Member
No idea on the lease conversion.
Technically it would be a 11.56 kW system (34 * 340W), but close enough to mine.
I don’t know how feasible that is. Even though solar panels are all about the same size they aren’t exactly the same size. I know that the new 340W panels are an inch or two longer and wider than the 315W panels they replaced, so I suspect that it’s unlikely that new panels will line up with your existing mounting system.
Yeah I realize its somewhat of a pipe dream. Even if I cant do it (which admittedly is likely) I want to buy my system out next year, which is supposed to be available after 5 years. There isnt a buyout price like a car lease, either. my contract says a buyout is supposed to be done with an appraisal. Given how much solar has dropped in the last few years, I am wondering how much my buyout would be even with what it is now.
SoCal Dave
Member
From what I've read, it isn't a system price appraisal - like you can buy a new 8kW system for $16K but yours is old so it is only worth $12K.
Instead it is a valuation on the value of the electricity the system still can produce. Making up numbers, but if your system is 5 years old it has 15 years of life left. Each year it is producing $2K of power so it is worth $30K (15 years * $2K). It seems completely insane and not worth buying out.
The one difference might be yours is a lease vs the ones I've read about are PPAs.
bkp_duke
Well-Known Member
Late to the reporting game, but here are my numbers from yesterday:
Date =9/21
System Size = 12.06kW (see sig for details)
Highest peak generation shown =8.6kW (71.3% of full system)
Solar generated today =58.7 kWh (4.9kWh per system size kW)
Location - North SD County
We had some significant marine layer until about 9:30 AM here, so missed out on a little bit of AM production.
SoCal Dave
Member
Interesting how you out performed all of us. I assume North SD was cooler or are your panels better aligned?
bkp_duke
Well-Known Member
SunPower panels with micro-inverters. They aren't cheap, but they are the best you can buy (highest efficiency, lower temperature loss coefficient, and less degradation over time).
If it makes you feel better, your panels will have long since paid for themselves and I'll still be waiting on mine to complete paying for themselves.
SoCal Dave
Member
Interesting.
I'm curious how much temperature is going to play a factor with my system's production. My guess is I'll produce the most in May and June. Long days, but the heat isn't as bad as August and September.
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