The Link 10 is an excellent instrument, and MUCH more than a mere volt-ammeter. The installation & extensive initial set-up is well documented in the instructions, and is the key to the device’s comprehensive intelligence. Having performed the set-up, you’ll get all the information you need from the Link.For many of us, the relatively high cost, and effort of installation may not be justified; but it can be an invaluable tool in evaluating & maintaining your electrical power system.Link-10 User Guide & Instructions:http://www.xantrex.com/support/docserve.asp?id=7Regards,Gord