How to solar power your home<br>Call a professional. Grid tied systems are probably your best bet, especially if you live in an area with reliable power. By having a grid tied system, you are eligible for tax credits, plus you'll be able to sell your excess power back to your power company.
In order to receive a tax credit it is not necessary to have a grid tied system.
( z1 need :polarity - :ARG1 ( z2 system :ARG1-of ( z3 tie :ARG2 ( z4 grid ) ) ) :purpose ( z5 receive :ARG1 ( z6 credit :mod ( z7 tax ) ) ) )