|Our 2.1 KW micro-inverter DIY PV array.|
Tuesday, November 8, 2011
How Much Money Do You Save Installing Your Own PV System?
When we did our PV system two years ago, I did not really have a good way to evaluate how much money I saved by doing the install myself, let alone how this might vary over the country. I knew how much it cost me, but, I did not really have a good number on how much an equivalent professionally installed system would cost.
The Nov/Dec issue of Solar Today answered that question by providing a state by state installed cost per watt survey. The current US wide average turns out to be $6.80 per peak watt.
Using the latest prices, a setup similar to what we put in two years ago would be about $3.30 per watt. So, the savings for for DIY install is a bit over 50%. For the 2300 watt system I looked at, this is a bit over $8000. Not exactly chicken feed.
Being a fan of solar thermal I'll just mention that that the cost per peak watt for our $1K Solar Water Heating system is less than 50 cents a peak watt -- Holy Cow! :)