Not enough??? You can fix that since you are on a lake.
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Not enough??? You can fix that since you are on a lake.
You are lucky, smoke where I live in foothills has been real bad for a long time. I have had times down 50% because of smokeMy production is down due to fog in the am and smoke, probably about 10%
Would love to see your panel layout if you can please.Size is about 30kw. The panels are all south, north and west. The north ones will get very little in the winter I expect. But, I hope I oversized enough that during the great months of like april to July, I can bank lots of energy for the winter use, since I am 99% electric with a big house.
I produced 4.8MKh in June.
My Jun and july is just the opposite of yours. 2020- was a better producer than this year, both months.
Others have mentioned some good points. We are not far apart in location so your daylight hour length are very close. Mine is 14:40 hours long on 20 June and 9:40 hours on Dec 20th, shortest day; five hours difference in daylight and sun arc changes as well, highest in June and lowest in Dec. day length changes the slowest around the 20th of each of those peaks, meaning it takes many days to gain or lose 1 min and changes the fastest around Mar 20 and Sep 20th. Easy to find out if you subscribe to your local newspaper with weather info.Hello fellow bay area,
My 4kW system (installed in January 2021) production peaked in May and then got worse and worse over this summer.
I wonder if it is due to wild fire smoke or my panels just need cleaning.
Please share your data point, thanks!
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Don’t forget all of the extra “cloud” cover in the form of the smoke crossing the country from the PNW fires.Our production in central MA is definitely down this year, mostly due to the absurd amount of rain we've had this summer.
These are our readings for the past 5 years, starting 2017 (1st full year of install) - all data is Jan 1st to Sep 3rd each year
2017 - 5177 kWh
2018 - 5166 kWh
2019 - 5452 kWh
2020 - 5403 kWh
2021 - 4603 kWh
I am in the Bay Area and my system is clearly degrading. 2020 was less than 74% of 2013. These are 240W polysilicon panels on Enphase M250 micros.
View attachment 706424
Not enough??? You can fix that since you are on a lake.
Some politicians have floated (no pun intended) the idea of putting these in the Aqueduct. But people in the biz say you need relatively calm water,They should call it how to make a lake totally suck!
I could see something like that on the California Aqueduct.
Some politicians have floated (no pun intended) the idea of putting these in the Aqueduct. But people in the biz say you need relatively calm water,
They should call it how to make a lake totally suck!
I could see something like that on the California Aqueduct.
It has been done in India; it helped reduce evaporation from the canal as well.They should call it how to make a lake totally suck!
I could see something like that on the California Aqueduct.
Sounds good. But at least by me, yesterday was partially cloudy and that means you get cloud edge effect that can temporarily boost the peak production numbers as the sunshine goes through the water molecules at the edge of a cloud. As I understand it, these edges act as lenses concentrating the photons. I know we see some of our highest peaks on partially cloudy days like yesterday.bumping this, but after the "rain" we got here in the bay area last night, my panels peak production went up by 1kW from the previous day. I have 8.16kW system installed on 8/24/21, first week I has hitting peak of 6.1-6.2kW, over the next month and so, peak production started going down, I saw the panels had some dust on, but thought we are going into fall, so probably that is why. However, today my system start peaking 6.1-6.0kW and panels looks clean.
I have had my reserve at 15%. But, yep, with the rain coming, do not expect I can fully recharge the PW's, so the first time this happens, guess I will increase the reserveSo this thread brings up a question I have on the powerwall setting for the winter. I’m running my house off the Powerwalls from 4 to 9 peak, should I lower my reserve and just keep my setting on time based and if it gets to the reserve because of not enough sun let it then pull from the grid until the Powerwalls charges to 100%. Looks like for the next 7 days or so it will be cloudy and raining.
So this thread brings up a question I have on the powerwall setting for the winter. I’m running my house off the Powerwalls from 4 to 9 peak, should I lower my reserve and just keep my setting on time based and if it gets to the reserve because of not enough sun let it then pull from the grid until the Powerwalls charges to 100%. Looks like for the next 7 days or so it will be cloudy and raining.
I would say California is the issue for we cannot keep power on, but lets force more things electricIMO, this is the toughest season for Solar + Powerwall unless you're h2ofun with a monstrously oversized solar array.
The rain and high winds present what is supposed to be the worst impact to grid reliability. For example, the 0.25 inches of rain we saw on Sunday knocked out power to like 30,000 homes. 3 people at my work alone had no power for most of yesterday. Can you imagine any other grid in the USA that becomes unstable with 0.25 inches of rain?
So if you have Powerwalls with the intention of having some backup during an outage, you will want to set your reserve to a rather high level.
That is why the ideal situation is to be able to top off your Powerwalls a bit with grid energy from like 3am to 6am. Maybe not to 100%, but just enough so that the next day's muted solar production can fill up the remainder. This way you make sure you never tap into shoulder or peak rates. I really wish Tesla would allow this functionality when the weather has expected rain/clouds in the forecast.