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I never take loans other than a mortgage (which I paid off), instead I use money I saved up. If you have to take out a loan för the installation the calculation

I never take loans other than a mortgage (which I paid off), instead I use money I saved up. If you have to take out a loan för the installation the calculation would change depending on how much the sharks take. The installation produces between 12.000 and 15.000 kWh per year which either is used directly (about 1/3) or sold at wholesale rate. Price for 1 kWh varies between ~1.50kr and ~5kr, last winter there were some extremes going up to more than 10kr. The minimum of 1.50kr occurs when electricity is basically free and constitutes taxes and surcharges which are always levied. Average price paid per kWh lies somewhere between 2kr and 4kr. With an average self-consumption of about 1/3 of the production, i.e. 4000-5000 kWh this saves ~13.500kr/year. The rest is sold at market rate plus an additional 0.31kr/kWh feed-in payment from the network operator, the total average ends up somewhere around 1kr/kWh giving around 9000kr/year for a yearly total (savings+income) of ~22.500kr/year. The total cost for the installation was ~130.000kr (66.700kr for the panels, 27.500kr för the inverter, 21.500kr for the mounting hardware, 5000kr for the cables (about half of which is not used yet, meant for future extension), 6000kr for electrical hardware like overcurrent protection, fusing and AC breaker plus a bit for screws, clips and nails. Without compound interest the payback period is 5.7 years, with current low interest levels it is not much more. I can probably deduct part of the investment from taxes so this will bring down the payback period even more, in the end it will be somewhere around 5 years.

hot_gril 4y ago
Appreciate the detailed calculations. My coworkers in California were quoting worse, but they probably paid for installation labor. > I never take loans other than a mortgage (which I paid off), instead I use money I saved up So opportunity-cost-wise, you'd have to otherwise invest in something that doubles in value over ~a decade. That's hit-or-miss with stocks in the US at least, so 5.7y break-even on this sounds decent.

hot_gril 4y ago

Appreciate the detailed calculations. My coworkers in California were quoting worse, but they probably paid for installation labor. > I never take loans other than a mortgage (which I paid off), instead I use money I saved up So opportunity-cost-wise, you'd have to otherwise invest in something that doubles in value over ~a decade. That's hit-or-miss with stocks in the US at least, so 5.7y break-even on this sounds decent.