I had a similar problem with windmills but I worked it out. Try getting rid of the batbox at the solar collector end so its:
Solars
Copper
LV Trans (Powered)
HV Line
MV Trans (Powered)
HV Line
HV Trans (Powered)
HV Line (several)
HV Trans
HV Line
MV Trans
HV Line
LV Trans
Copper
Batbox
Put switches on the solar collector end transformers and turn them all on. Make sure the 3hole side ALWAYS points to the high voltage side for ALL transformers.