I purchased this unit for my neighbour so she could monitor her "sunny boy" solar panel inverter. I had already tested my own on her inverter and it worked perfectly.
Her new unit did not work, however, the problem being that "sunny boy" inverters will only connect to bluetooth drivers written by a handful of suppliers ie broadcom, microsoft or toshiba - but not Belkin!
The solution is either not to install the driver on the cd accompanying the unit or to deinstall if you have already done so and then let the unit find a driver (hopefully microsoft) on the web.
Then it will work perfectly like all Belkin products appear to do