These days investors are in search of unique companies which are seeing a phenomenal growth in their business and are expecting better profit margins in the days to come. As a result, the stocks of top solar energy companies are in demand. Given below are some vital suggestions on how you too can invest in solar energy stocks. Look for Technologically Advanced Firms In the future, solar energy demand and applications are expected to rise tremendously. To cater to the rising demand, firms will need to have very high quality and modern technology. So, before investing in solar energy stocks, it is essential to know of the technological advancement of the firm. Ideally, you should go for companies that have an advanced research and development department that is engaged in new inventions to beat competitor firms. Check the Fundamentals Technology alone cannot be the factor to consider while selecting the top solar energy stocks. You also need to look at the fundamentals of the companies in this business and select the ones which have a good track record in dealing with clients successfully. Examining cash flow, profit and loss accounts and balance sheets of firms is essential to know of their cash reserves and financial strength. Know the Debt Levels All those keen on investing in solar energy stocks should understand that high debt levels can create a major problem for firms. Companies with high debts have to spend a huge amount of money on interest payments, and this affects their financial status and future plans. So, as far as possible, choose companies with comfortable debt equity ratios. Be a Long Term Investor All investors wishing to invest in the solar energy sector should note that investments can give superior returns only in the long term because the nature of this business is capital intensive. A lot of money is utilized in purchasing equipment, machinery and their maintenance, and hence it takes years even for the leading solar energy companies to post big profits. So, the time frame for investment in solar energy stocks should be for more than three years. Check for Institutional Interest in Stocks Institutional investors generally invest in huge amounts in companies having promising future. So, before you put your money in stocks of solar energy firms, you need to check institutional stakes in these firms. When you put your money in the solar energy sector, you should have an investment perspective rather than trading in these stocks for small term gains. Stocks of companies with rapid expansion plans can become multi-baggers in the future and help you earn big money. You can take help from your stock broker or stock investment expert to choose the right stocks. DISCLAIMER: This article is just for reference purposes and does not recommend any stock market transactions.