System size confusion
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Hello, I have been researching residential solar panels for a weeks now and stumbled across this forum. We have met with 3 different companies and obtained 2 quotes. All 3 companies have stated we need a system around 6.2kWh to 6.6kwh to zero our monthly electric, however when I put my usage in a solar calculator it is telling me roughly around a 11kWh system. Obviously that's quite a difference, even one of the invoices from the company on a 6.6kWh system only estimated roughly 50 percent of electric usage per year. Here is my setup:
central florida
3100 sq ft. (New build, been in 6 months)
Oct 2016 roughly used 1530kWh and march 2017 was 897kWh.
No shading/trees chimney issues
roof faces pretty much dead south
first quote:
7.08kwh
24 canadian 295s
solar edge se7600 w/ 24 se300 optimizer
permitting installing and whole 9 yards for
$26020
Second quote:
6.55kWh
23 solarworld 285s
sb tl7000-us
Permitting installing and whole 9 yards for
$15299
thoughts?
Thank you for your time and response.
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Your low number seems awfully cheap for a ground mount system. Does this include all trenching, underground conduit, concrete and ground up racking?2.2kw Suntech mono, Classic 200, NEW Trace SW4024Comment
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36 Solarworld 325 watt premium USA made solar panels (11,700 watts)
2 SMA 6.0 TL US grid tied inverter with 2,000 watt SPS (secure power supply)
Iron Ridge racking ground mount
All conduit, wiring, MC4 connectors, ground lugs
Internal WIFI Monitoring included in the inverter
Warning labels applied to conduit
Engineering, Permitting, Installation
Balance of system parts
Total cost $27,700
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At $2.37 a watt for a ground mount, that seems almost too good to be true. Can you get reviews from previous customers or any other reviews of this contractor? If that checks out and you do decide to go with them, you ought to make sure the total is correct and not a typo.2.2kw Suntech mono, Classic 200, NEW Trace SW4024Comment
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CS6P-260P/SE3000 - http://tiny.cc/ed5ozxComment
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Who isn't on the verge of bankruptcy? Is a warranty from some faceless overseas corporation any better, just because they have a division that will sell you a TV too? I doubt I'll ever meet a single person who successfully wins a claim on a solar panel manufacturer's warranty.... the only payouts I've heard of are when the problems elevate to lawsuit level (BP Solar, for example). Installer warranties are worth much more (as long as they are in business)... the actual cost to replace a bad panel is much more about the time and effort to swap it than the equipment cost of the panel itself.2.2kw Suntech mono, Classic 200, NEW Trace SW4024Comment
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OutBack FP1 w/ CS6P-250P http://bit.ly/1Sg5VNHComment
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In their defense, and I don't know if they have remedied the problem but, if they have then the problem may not still exist.
2.2kw Suntech mono, Classic 200, NEW Trace SW4024Comment
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I have a similar question. I am in NJ and have been talking to a few installers big and small.
my question is about production guarantees.
i feel I have a good price from a installer who quoted me 20 lg 365 w panels and solaredge inverter/optimizer for $24895.
which I believe will cover almost 100% of my electricity usage.
now this vendor says 10 years labor warranty but no production guarantees.
other quotes are similar with older lower wattage panels but with 100% usage coverage and production guarantee but about 2k higher price.
should I worry about production guarantees? Or just take on the risk myself?
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Production (of a properly operating system) is pretty much a function of the weather (for those of us who
actually HAVE weather). Any guarantee is going to be set so low that it can't fail. Bruce RoeComment
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I have a similar question. I am in NJ and have been talking to a few installers big and small.
my question is about production guarantees.
i feel I have a good price from a installer who quoted me 20 lg 365 w panels and solaredge inverter/optimizer for $24895.
which I believe will cover almost 100% of my electricity usage.
now this vendor says 10 years labor warranty but no production guarantees.
other quotes are similar with older lower wattage panels but with 100% usage coverage and production guarantee but about 2k higher price.
should I worry about production guarantees? Or just take on the risk myself?
Why do you say others are "older lower wattage panels" did you base your dicision primarily on watts per module? if you did you do know that those LG modules are larger by 12 cells than the more common residential 60 cell modules? The 365 modules are actually the older lower efficient (Neon 1) modules than the smaller 60 cell LG Neon 2s.
Basically solar is sold by the watt not the module (panel). A 7.3kW system will produce the same if it is made of 20 modules or 23 modules.Last edited by ButchDeal; 06-03-2017, 11:29 AM.OutBack FP1 w/ CS6P-250P http://bit.ly/1Sg5VNHComment
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Ref:Butchdeal
My decision to go with LG 365 was two fold.
1. They are the neon 2 panels
2. Limited roof space
so I need to get the max output from the least number of panels.
size wise from specs I was given are the same so why not go with get 365w instead of 280w or 300w in the same space.
i just signed the contract for site inspection and have asked to max out the roof space with whatever can fit, which as per calculation is max of 21 panels. Which is very close to my 100% electricity usage.
site inspection will be the final decision as to how many can fit on the roof.
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Ref:Butchdeal
My decision to go with LG 365 was two fold.
1. They are the neon 2 panels
2. Limited roof space
so I need to get the max output from the least number of panels.
size wise from specs I was given are the same so why not go with get 365w instead of 280w or 300w in the same space.
i just signed the contract for site inspection and have asked to max out the roof space with whatever can fit, which as per calculation is max of 21 panels. Which is very close to my 100% electricity usage.
site inspection will be the final decision as to how many can fit on the roof.
Did you really have to sign a contract to have a site inspection? Hopefully the truth comes out before you are fully committed to moving forward with this vendor -- because if they told you the LG 365 panels are the same size as the other 280w or 300w panels, then they can't read spec sheets. The Lg 365 panels are 1960mm x 1000mm vs their 60 cell panels which are 1640mm x 1000mm.8.6 kWp roof (SE 7600 and 28 panels)Comment
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