That's one reason why I invested around $30,000 in renewable energy features (passive and active) in the house I built last year. $3k per year amortised over 1

That's one reason why I invested around $30,000 in renewable energy features (passive and active) in the house I built last year. $3k per year amortised over 10 years for a low operating cost system, comfortable living and working environmnet? It's a no brainer.