The Swedish PV market is still limited compared to many other countries in Europe. However, the growth is strong. 19 MW was installed in 2013 showing that the market more than doubled during 2013 in comparison to 2012. Hence there is of interest to more in detail study the profitability of PV electricity in Sweden for grid connected PV systems, to understand how competitive PV is on the Swedish market. LCOE and payback period are presented for a PV system that is installed to replace retail electricity with PV electricity. Both the cases of private residential systems and of non-private systems are considered.
Consumers tend to have problems interpreting cost information, such as the annual percentage rate (APR), pertaining to loans. Students were used to test people's spontaneous estimates of loan cost when only the payment pattern was known, but not the APR or the total finance charge (FC). Experiments show that some absolute measures such as the FC seem to be used rather than relative measures when ranking loans. This leads to a bias against loans of longer duration. This can be avoided by using a heuristic, an approximate APR, by a simple development of the FC. The last section examines the problem of estimating the duration change when the interest rate is altered. Experiments show that the duration is generally underestimated when only the payment pattern and the interest rate are known. If the FC per month is known the situation improves somewhat, but still the effects on the duration of changing interest rates are underestimated.
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