FPL customers hoping to generate their own electricity may have another option in the near future: a Bloom box.

CBS News' 60 Minutes featured an interview yesterday with K.R. Sridhar, from Bloom Energy, who invented the box and will release details about it Wednesday.

To power a home, you'd need one about the size of a car battery. But the current cost is unclear.

Sridhar told reports 60 Minutes Correspondent Leslie Stahl that the cost for an average homeowner is expected to decrease in the next 10 years to about $3,000. Large versions of the box used by about 20 companies so far cost about $700,000 each but clean energy rebates and tax breaks cut the price in half.

"Won't the utility companies see this as a threat and try to crush Bloom?" Stahl asked John Doerr, a partner with Kleiner Perkins Caufield & Byers who is investing in the technology.

Doerr said utilities can buy the box to replace substations.

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