Grant Income – Green Accountancy
SGIP is a distibuted generation program for which the utility has control to turn on your powerwall to power the grid. So you are doing work and the GRANT IS TAXABLE INCOME.
Paying taxes isn't all bad, at least it means you have income, things can be worse...
The article referenced is tax advice from the United Kingdom, probably not something that I would want to rely on in front of the US IRS. But YMMV...
All the best,
BG