It would be very difficult.
From wikipedia... Lightning - Wikipedia, the free encyclopedia
"An average bolt of lightning carries an electric current of 40 kiloamperes (kA), and transfers a charge of five coulombs and 500 MJ. Large bolts of lightning can carry up to 120 kA and 350 coulombs[1]. The voltage depends on the length of the bolt, with the dielectric breakdown of air being three million volts per metre; this works out to approximately one gigavolt (one thousand million volts) for a 300 m (1000 ft) lightning bolt. With an electric current of 100 kA, this gives a power of 100 terawatts. "
So, you need a system capable of absorbing all of that power in an instant, convert it to the voltage necessary for your storage system, and store it... all in a VERY short period of time. And unless you've got a nice tall tower to ensure your feeder is the highest point for miles around, you can't gaurantee lightening strikes.
Then there's the problem of long periods between thunder storms.
From wikipedia... Lightning - Wikipedia, the free encyclopedia
"An average bolt of lightning carries an electric current of 40 kiloamperes (kA), and transfers a charge of five coulombs and 500 MJ. Large bolts of lightning can carry up to 120 kA and 350 coulombs[1]. The voltage depends on the length of the bolt, with the dielectric breakdown of air being three million volts per metre; this works out to approximately one gigavolt (one thousand million volts) for a 300 m (1000 ft) lightning bolt. With an electric current of 100 kA, this gives a power of 100 terawatts. "
So, you need a system capable of absorbing all of that power in an instant, convert it to the voltage necessary for your storage system, and store it... all in a VERY short period of time. And unless you've got a nice tall tower to ensure your feeder is the highest point for miles around, you can't gaurantee lightening strikes.
Then there's the problem of long periods between thunder storms.