Solar Panel Quote - Texas.

[Sunking]

You pay less than 10 cents per Kwh, no Net Metering, and no local incentives. Invest the money for 10 years and retire off it.

[Naptown]

This is where I am stuck. B gave me datasheet specs for the PV. I don't know if this would suffice.

Conergy PH 230P-255P

Rated power (Pmax) 255W
Power tolerance +3%
Module efficiency 15.5%
Maximum power voltage (Vmpp) 30.68V
Maximum power current (Impp) 8.33A
Open circuit voltage (Voc) 38.40V
Short circuit current (Isc) 8.69A
Nominal Operating Cell Temperature (NOCT)43±2°C
Temperature coefficient (Pmax) –0.47%/ºC
Temperature coefficient (Voc) –0.34 %/ºC
Temperature coefficient (Isc) 0.05 %/ºC
Maximum system voltage 600v (UL) /1000v (IEC)
Maximum Series Fuse Rating 15A

At Standard Test Conditions (STC): 1000W/m², 25°C, air mass 1.5

Also, B is offering me installation of Power Optimizer Add-on within that price.

255 watt panels x 31 panels = ?
The only way to do 31 panels is with the optimizers or a power1 inverter.

[Ian S]

I don't see what you're paying for electricity. You need that info to figure out whether the deal makes sense financially. Simplest approach is to calculate how long it will take to recoup your costs by way of savings on your electric bill. If less than 10 years, it's a good deal. 10-15 it gets dicey. 15-25, you really have to want to go solar. Beyond 25, it makes no sense whatsoever IMHO.

[iandowny]

You didn't include nameplate ratings on the b systems and the production was way off for b3

This is where I am stuck. B gave me datasheet specs for the PV. I don't know if this would suffice.

Conergy PH 230P-255P

Rated power (Pmax) 255W
Power tolerance +3%
Module efficiency 15.5%
Maximum power voltage (Vmpp) 30.68V
Maximum power current (Impp) 8.33A
Open circuit voltage (Voc) 38.40V
Short circuit current (Isc) 8.69A
Nominal Operating Cell Temperature (NOCT)43±2°C
Temperature coefficient (Pmax) –0.47%/ºC
Temperature coefficient (Voc) –0.34 %/ºC
Temperature coefficient (Isc) 0.05 %/ºC
Maximum system voltage 600v (UL) /1000v (IEC)
Maximum Series Fuse Rating 15A

At Standard Test Conditions (STC): 1000W/m², 25°C, air mass 1.5

Also, B is offering me installation of Power Optimizer Add-on within that price.

[Naptown]

You didn't include nameplate ratings on the b systems and the production was way off for b3
That puts b3 in the winner slot.

[iandowny]

Given the equipment specified and the costs they are all too high at over 4.00 a watt

I must be calculating it wrong.

When I did 'Total Contract Price'/'System Output', I am only getting anywhere from 3.09 - 4.7 (Before rebates (Federal and Energy Provider))

And when I discount those, it comes anywhere from 1.5 to 2.3 per watt? Am I not understanding this right?

[iandowny]

Also, btw, I am comparing A1 and B3 proposal more closely, since that is the system size I probably will go to.

[Naptown]

Given the equipment specified and the costs they are all too high at over 4.00 a watt

[iandowny]

Solar Decision.pdf

Attached above. I am trying to do some research on which is more cost effective quote for me. Can you please look at the proposals that I attached in the PDF and tell me if these proposals pass mustard?

Also, here is my consumption history (kWh).
2012 Jan 345
2012 Feb 524
2012 Mar 482
2012 Apr 527
2012 May 778
2012 Jun 1346
2012 Jul 1944
2012 Aug 1696
2012 Sep 1322
2012 Oct 655
2012 Nov 723
2012 Dec 661
2013 Jan 689
2013 Feb 632
2013 Mar 631
2013 Apr 849
2013 May 1304
2013 Jun 1753

Attached PDF.

PS: My Energy provider (CoServ) might give me a 5K discount for the year 2014 (that's why provider A is discounting that in the final price already).

Thank you for your help.