Saturday, February 1, 2014

Costs and Benefits


I'll be the first to admit that at retail prices with no incentives, residential solar is not yet affordable.  However, what makes it affordable, or actually even slightly profitable, is a 30% tax credit.  I essentially am paying 30% less for my system, with the remainder being paid by taxpayers in general.  (You're welcome.)

My 10KW system cost me $34,900 installed. (Yes, that's $3.49 per Watt for those of you tracking prices.)  This was a "turnkey" installation. I didn't need to do any permits, buy any equipment, or do anything at all... the installer took care of all that.  That will net me a $10,470 tax credit.

However, I was able to completely finance this installation with a "solar loan".  I have a 15-year FHA "Home Improvement Loan" (tax deductible) for the first $25000, plus an add-on "same-as-cash" loan for the balance (plus fees, etc.) which I need to pay off within 18 months.  Of course, the plan is to pay it off with the 30% tax credit.

Here's the math for costs incurred before my system was activated January 5:

Loan application fee: $100
December loan payment: $229.16

December Savings:
Tax savings from deductible interest: $42.29

January Costs:
Loan payment: $229.16
January Savings:
Reduced electric bill (1.09MWh * $0.05227) = $56.97
Tax savings from deductible interest: $42.16

Running total of costs: $558.32
Running total of savings: $141.43

(Monthly savings are not expected to exceed costs until June when summer peak rates kick in, getting ahead by September.)

A prediction for February:
Reduced electric bill (3.95 * 28 * 10 = 1.105 MWh) = $57.77
Tax savings from deductible interest: $42.03

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