A 37kW solar system will certainly cost a different amount depending on the solar business you buy it from. Prices also vary from city to city due to logistics, taxes etc. To give you some indication though, we believe that the "market price" for a 37kW solar system at the moment is between: $42,600.00 (on the lower end -. The cost of 37kW solar power systems varies. On the lower end, you might expect to get Chinese inverters such as Sungrow, Growatt, JFY, GoodWe etc. and Chinese (lower-tier) panels such as Hannover, Munsterland, ZN Shine. You could expect to pay somewhere between $1,317.38 and $1,997.42 per month as a repayment for your 37kW solar power system. Note: This figure could vary drastically. It is based on.