I also agree with Ed, especially regarding the C rating of your LiFEPO4 batteries. I built a solar generator based on Julian¡¯s (OH8STN) 576W design and when researching this chemistry I found there was a wide range of C values, which tells the amperage that the cells can put out. It would be interesting to see what your cells¡¯ C rating is.
BTW, operating in an olive grove surrounded by salt water sounds like a very pleasant operating environment!
Jay
73 de N0SR?
JaySheepdog