Wire Gauge Required Question
For some reason I just can't understand the various wire gauge tables, and I have tried to, so I am hoping somebody will take pity and do all the work! :) One table that I can follow says that for...
Forum Discussion
MEXICOWANDERER wrote:
Question?
Is it a standard for MPPT manufacturers to clearly post clear and understandable values (like a chart) to determine EFFICIENCY with 12 volt systems, when a RANGE of input voltage values are involved? Say 18 to 100 volts. That'll do for a starter.
To some degree yes.
The efficiency is typically maximized at or near rated current on the load side with a nominal input voltage.
When higher voltages are applied to the source side, the losses increase due to the switching times associated with transistors and diodes, and the energy stored/consumed by this stored device charge.
These losses are non-linear and vary with panel parameters so good reliable data is somewhat system specific.
EDIT: Here is a graph from my controller
