U.S., Nov. 23 -- Every startup founder or CEO of a young company is in a hurry to succeed. The company is their life's work; their hopes and ambitions all tied up in it alongside their capital. When that business is a clean energy business, there is added urgency: climate change doesn't wait, and if this innovation can make a difference, there is a moral pressure to get it to market yesterday, if not sooner.

So, when the first VC makes an offer, the temptation to take the money is strong. Money in the bank this morning means investing in the business this afternoon, which means profit and environmental impact tomorrow.

But picking the right investor can be a case of 'more haste, less speed'. In fact, it may be that clean energy entrepren...