I hope that the following article will help you to better understand this topic: Alternative energy mutual funds
ETFs combine characteristics of both mutual funds and closed-end funds. Investors may also benefit by having a third party (professional Alternative energy mutual funds managers) apply expertise and dedicate time to manage and research investment options, although there is dispute over whether professional Alternative energy mutual funds managers can, on average, outperform simple index funds that mimic public indexes.
Far from eye, far from heart
Growth Alternative energy mutual funds tend not to pay regular dividends.
Renewable energy is produced simply from ecological sources. It will not perish like fossil fuels like oil, coal, natural gas and also is less or no contaminating.
I dare say
If  Alternative energy mutual funds are divided into multiple classes of shares, each class will typically have its own NAV, reflecting differences in fees and expenses paid by the different classes.
There are some discouraging qualities to many of these technologies, but as weconsider it, the desirable aspects far overcome the adverse qualities.
Each class will invest in the same pool (or investment portfolio) of securities and will have the same investment objectives and policies.
The Alternative energy mutual funds areas we found are:
Solar Power mutual funds
Wind Power mutual funds
Tidal Power mutual funds
Hydro Electic Power mutual funds
Geothermal Energy mutual funds
Biomass Energy
Most Alternative energy mutual funds investment portfolios are continually adjusted under the supervision of a professional manager, who forecasts cash flows into and out of the Alternative energy mutual funds by investors, as well as the future performance of investments appropriate for the fund and chooses those which he or she believes will most closely match the fund’s stated investment objective.

As the saying Goes
Only on paper has humanity yet achieved glory, beauty, truth, knowledge, virtue, and abiding love  — George Bernard Shaw

Some tips about Alternative energy mutual funds investing