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"only about 20 percent of households had access to green loans from banks to do so, because they often require sufficient equity in a house and for the homeowner to have an active mortgage."

I get the equity requirement. But why an active mortgage?

Tim Sparks, at the Electricity Authority!?
Thing is - the _install_ costs recently dropped while power price went significantly up.

And for comparison, power in Australia was always about 2x more expensive, while solar was about 2x cheaper. That's a 4x worse payback period in NZ!

> He said it was cheaper to put solar on houses than build solar farms

How?