OutBack created the de facto industry standard when the company introduced its MX60 design, the first multi-voltage Maximum Power Point Tracking (MPPT) charge controller. Now OutBack follows up on its original breakthrough with another first: an outdoor-rated charge controller with unprecedented thermal management capabilities designed for the most extreme environmental conditions.

The FLEXmax Extreme is engineered around the concept that the strongest chain is one with no weak link. In
the case of charge controller design, the weak link is typically the cooling fan. Removing the fan removes the greatest obstacle to long service life and high reliability, as fan problems severely limit power output.

FLEXmax Extreme’s advanced thermal engineering provides full power output from -20 to 45°C without requiring a cooling fan. And because a passively cooled unit can be sealed, circuit boards and other sensitive electronics are protected from dust, dirt, insects, and other external sources of contamination.

Installer features of the FLEXmax Extreme include: “ground-agnostic” design to support negative-, positive- and floating-ground systems, substantial wire-bending space, oversized terminals for easy installation with large gauge wire, and mechanical design that permits servicing and replacing all power components while the unit is mounted on a wall and attached to conduit.