If you're in a SECO service area, they offer the same type of thing that mounts between the outside meter and the box. You have the option to purchase outright ($349 plus tax including free installation) or pay month-to-month ($5.95/month plus tax, $25 installation fee). See
http://www.secoenergy.com/surge.html . Also, click on "Meter Treater Q&A" at the bottom of that page to open a pdf that contains some interesting info!!
Bill
