Based upon the replies to this topic, I am concluding that no member of the airraidsirens forum is aware of any municipalities that would be willing to pay $3000 for a Tbolt battery backup system.

Ok, I realize this topic has been raised several times in the past few years, and I have read all the posts. But please read on. If a battery backup attachment for Tbolts existed with the following features: * Ten minutes minimum run time for temperatures above 32 degrees F * Eight deep-cycle lead-a...