We're grounded.There've been quite a few questions about our solar PV system. Now the
Norse sun goddess will answer your queries.
You may be asking,
What's that spiral thingy in a pit? It's a copper wire in a hole by the side of my house, attached to the meters. I found it when we got back from camping Sunday. I assume it's the PV-system ground wire and not some paleopagan artifact the installers unearthed for fun. The hole is three feet deep in an area where the topsoil is about three inches thick so I'm guessing no fun was involved at all.
Ziz asks,
How much did it cost and how much does it generate at peak flow? Ours is a 3.2 kW system, meaning that's its peak output. The sticker price was about $22,000, minus a whopping rebate from
Austin Energy of nearly $12,000, which the utility pays directly to our contractor. We got a loan at a decent rate for the balance through the utility's deal with a credit union, and of the remaining $10,000 we'll get to knock off $2000 on our 2006 federal income tax because of the solar tax credit (which is good only for 2006-07).
A woman at Rocketboy's gym asked me,
Can PV panels can be installed on a metal roof? Yes, they can. My estimator said that's the preferred method, as they can just clamp things to the seams on the roof. Also, a metal roof will outlast a shingle roof by many years, allowing you to avoid the hassle and expense of having your solar contractor remove and re-install your system when the roof needs reshingling.
I myself asked,
Should we get a battery for the system? For us, the answer was no. We're tied into the grid (and we have net metering so any overproduction gets sold to the utility) and a battery costs around $4000. If we were off-grid, sure, but in our situation a battery would never pay for itself.
And everyone wants to know,
Is it working yet? Not yet. As with any home improvement project, there are delays for parts and inspections. Right now we're waiting on two surge protectors for the PV system and a special flashing for the solar attic fan. After that stuff's installed, we have to get the thumbs-up from the city before the switch is flipped. When that day arrives, some time in the next week or two, you can bet I will tell you about it.