I just ordered a GRT Horizon HXR EFIS and was surprised to learn that it doesn't come with any sort of battery back-up.
GRT will be glad to sell me one for "only" $140 extra, but they "recommend" the $275 version.
Given that I could buy another Concorde battery and wire in an entirely separate and redundant battery system for the entire plane for less, I have hesitated and did not order their battery.
Has anyone found an acceptable alternative?
GRT will be glad to sell me one for "only" $140 extra, but they "recommend" the $275 version.
Given that I could buy another Concorde battery and wire in an entirely separate and redundant battery system for the entire plane for less, I have hesitated and did not order their battery.
Has anyone found an acceptable alternative?