Long Island, NY proposal

[Kidneydocmd]

Hello everyone,
I've been contemplating going solar for quite some time and would appreciate some input on this proposal. I'm new to this site, so please let me know if additional information is needed.

Annual Electrical Usage 8,424 kWh

24 SunPower SPR-X21-345 producing 8793 kWH's of annual electricity
offsetting 104%

Total cost: $33,585
NYSE RDA rebate, federal tax credit, New York State tax credit, take cost down to $17,640

Cost per kWh (30 year basis) $0.07

[sunnyguy]

May want to check out:

https://www.solarpaneltalk.com/forum/solar-panels-for-home/solar-panels-for-your-home/303403-is-sunpower-price-difference-worth-it-thoughts-posting-as-new-topic

https://www.solarpaneltalk.com/forum/solar-panels-for-home/solar-panels-for-your-home/300687-2-98-watt-lg-solaredge-quote

[SunEagle]

Hello everyone,
I've been contemplating going solar for quite some time and would appreciate some input on this proposal. I'm new to this site, so please let me know if additional information is needed.

Annual Electrical Usage 8,424 kWh

24 SunPower SPR-X21-345 producing 8793 kWH's of annual electricity
offsetting 104%

Total cost: $33,585
NYSE RDA rebate, federal tax credit, New York State tax credit, take cost down to $17,640

Cost per kWh (30 year basis) $0.07

Did you do the math on that system? If the final cost is $17640 and it produces 8793 kWh a year @ $0.07/kWh it will take you over 28 years to pay for the system.

8793kWh x $0.07/kWh = $615/yr savings . $17640 / $615 = 28.6 years.

[acamato]

Did you do the math on that system? If the final cost is $17640 and it produces 8793 kWh a year @ $0.07/kWh it will take you over 28 years to pay for the system.

8793kWh x $0.07/kWh = $615/yr savings . $17640 / $615 = 28.6 years.

Rates on LI are ~$0.21-$0.22/kWh. Savings would be $0.14/kWh = $1,231.02/year.

Looking at it another way:

24 x 345W = 5880 W

$/W = $5.71. Seems high.(prior to incentives)

I installed a 13.23kW (42 LG 315 W Panels, SolarEdge inverter) for ~$3.4/W (prior to incentives)

[ButchDeal]

Did you do the math on that system? If the final cost is $17640 and it produces 8793 kWh a year @ $0.07/kWh it will take you over 28 years to pay for the system.

8793kWh x $0.07/kWh = $615/yr savings . $17640 / $615 = 28.6 years.

I don't think he has $0.07/kWh power in Long island NY. I think what he is saying is that the PV system will be giving him 30 years of power at $0.07/kWh instead of the Long Island rate of ??

[SunEagle]

Rates on LI are ~$0.21-$0.22/kWh. Savings would be $0.14/kWh = $1,231.02/year.

Looking at it another way:

24 x 345W = 5880 W

$/W = $5.71. Seems high.(prior to incentives)

I installed a 13.23kW (42 LG 315 W Panels, SolarEdge inverter) for ~$3.4/W (prior to incentives)

I agree if your rates are above $0.25/kWh you get a much shorter payback. Anyone paying less than $0.15/kWh makes it much harder to justify solar unless you get a final price of < $2/watt.

[SunEagle]

I don't think he has $0.07/kWh power in Long island NY. I think what he is saying is that the PV system will be giving him 30 years of power at $0.07/kWh instead of the Long Island rate of ??

My mistake on what he was stating.

But even at $0.14/kWh savings or $1231/yr it will still take over 14 years to pay back that $17640 cost.

[ButchDeal]

My mistake on what he was stating.

But even at $0.14/kWh savings or $1231/yr it will still take over 14 years to pay back that $17640 cost.

yep, SunPower and NY install costs @ $4.05/w is killing his ROI.

[paris401]

I have '2' SP systems at my homes, and while not 100% scientific , they both outproduce larger systems in my area with similar orientations.. again maybe not 100% apples to apples, but its pretty close, and they can't touch my production..

[sunnyguy]

I have '2' SP systems at my homes, and while not 100% scientific , they both outproduce larger systems in my area with similar orientations.. again maybe not 100% apples to apples, but its pretty close, and they can't touch my production..

what is the % difference in average daily efficiency over the course of a year?

[Kidneydocmd]

I appreciate the feedback. I was also given a quote for LG panels. Price is pretty comparable, after incentives there is about a $700 difference final price. Quotes from a different company altogether are similar, so it's not an issue of this one company trying to rip me off. I was told breakeven was about 9 years, but seeing the math above convinces me that it is not. Maybe I shouldn't proceed with going solar.

[Kidneydocmd]

Hi everyone,
Is my math wrong: I'm looking at $4.05/watt pre incentive and $2.13/watt post. Are those that bad? Is this system really not worth it. My quoted price is comparable amongst two different companies and seems like the typical install cost on Long Island. Based on the reasoning mentioned in these posts it would seem like no one should even consider installing a system unless post incentive offer on Long Island is around $10,000, which does not seem reasonable. I appreciate any input. The loan rates in New York are set to increase significantly towards end of the month, at least according to the sales rep.

[paris401]

what is the % difference in average daily efficiency over the course of a year?

here are the '2' examples
both houses are on the same street, with the same orientation

1st system is 5.5 (mine) against a 4.9 - my system is 15% larger- on an average day, I am producing about 50% more, less the 15% = 35% - my system has been in for 13months, the one down the block has been in for 2 1/2 years

2nd system is 9.3 (mine) against a 9.9 - my system is 5% smaller - on an average day , I am producing about 25% more + the 5% = 30% - my system has only been in since oct 15, while the other system is 2years old.

the 1st system are using kyoera panels
the 2nd system are using lg panels

scientific... no.... real world...yes...

[ButchDeal]

here are the '2' examples
both houses are on the same street, with the same orientation

1st system is 5.5 (mine) against a 4.9 - my system is 15% larger- on an average day, I am producing about 50% more, less the 15% = 35% - my system has been in for 13months, the one down the block has been in for 2 1/2 years

2nd system is 9.3 (mine) against a 9.9 - my system is 5% smaller - on an average day , I am producing about 25% more + the 5% = 30% - my system has only been in since oct 15, while the other system is 2years old.

the 1st system are using kyoera panels
the 2nd system are using lg panels

scientific... no.... real world...yes...

scientific no, real world no.
what is azimuth and tilt of each? ( you said same orientation but that doesn't mention much and rarely are any to the SAME)
Shadow differences.
what is difference in inverters.
you also noted a difference in age, with being 1 to 1.5 years NEWER so less degridation.

Also you state

on an average day, I am producing about 50%

That is not the same an annual average.

NREL does scientific testing and has shown repeatedly that there is very little difference. You are showing anecdotal evidence.

[sunnyguy]

my system has only been in since oct 15

It will be interesting to see your full year results.