What is the maximum altitude I can install the MPPT60/80?
The MPPT60 can be installed up to 15,000 ft. (4572m). The MPPT80 can be installed up to 6500 ft (2000m).
Altitude limits are established by the potential for "creepage",
which means the lowered air resistance to electricity can lead to arcing.
Component spacing on the circuit boards are directly related to creepage.