I would however like feedback on the assumptions of 5 % / year increase in retail electricity prices and 5 % / year decrease in PV system prices. (johnquiggin.com)
Get best solar power systems prices for your home or business. (blog.feedspot.com)
However, for space - constrained roofs and small installations where PV modules make up a small portion of total system prices, higher efficiency products often pay for themselves. (pv-magazine.com)