12 K solar system?

[David M]

Hmmmmmmmm, not too sure about that. You need to know your DAILY usage. Also need an idea of regular spikes in usage. You can get a rough idea by looking at your current electric bill and dividing those kw by the number of days. If your 100kw divided by 30 days means approx 3.33 kw per day, then you would need a system that generated on average 3.33 plus whatever you lose to inefficencies, so maybe 5kw per day for example if 70% efficient. I know in my own case, I need to average about 15kw per day to keep even, but since Jan 1 this year, I have only averaged 12.7kw - with low of 2.3kw on Mar 7 and high of 23.0kw on Mar 15. That's where my generator comes into play. Does that $12K figure include a backup such a a generator? A generator may be important on those high usage days also.

Search the archives - a treasure trove of info already posted.

David

Ninole Resident