GT3.8 and the SPRX4000 are identical hardware, I believe its just labeled for SunPower

The GT5.0 is running both of my photowatt arrays ... I'm working on adding another 5.1kw array and another GT5.0 using the Florida rebate program

The graphs are done by RRD (Round Robin Database). It's really good at logging sampled values, but not so good at "cumulative" values (kWh per week, kWh per month). Fun to play with, though.

As I understand it, my Xantrex is an oddball GT4.0 unit. It is not an SPRX4000:


Rumor is that the hardware is identical to the GT3.8, only the GT4.0 has a raised output cap and needs a 25A breaker to be code compliant.