AT&T and solar company SunPower have announced a joint deal that will see AT&T provide data connections for solar module telemetry, and a cross-selling marketing campaign for qualifying AT&T customers in the summer. SunPower has recently launched its Equinox solar system, aimed at households considering rooftop installations. SunPower claims that Equinox delivers 70% more energy over a 25-year period with 70% fewer visible parts than conventional solar panels – essentially a nicer looking and more efficient unit. As SunPower’s manufacturing is done in-house, it offers a 25-year warranty on its generation hardware, and a 10-year warranty on the monitoring kit. That’s a very powerful sales tool to sell to potential adopters. A smartphone app and web dashboard provides a breakdown…