All fuse sizes will be determined once the item is purchased......................
I had not looked at this topic before. I wonder how Tiki TD has made out with this?
There seems to be an issue with the schematic he posted.
The inverter DC side connection is incorrect. The inverter DC side connections is always made to the battery, preferably with a fuse in the positive line as close to the battery as safely possible. The DC side of the inverter should not have any connections directly to the solar controller. Never. I hope nobody has taken this schematic as the
way to wire that portion of their system.
Some solar charge controllers do indeed have terminals labeled for "load". That is not meant for large amperage loads such as an inverter. They are simply meant for use with low amperage devices like lights.
The comment about fuse sizes deserves comment too, as fuses are designed to protect the wiring, not the connected devices. Fuses are sized by the rated allowable amperage for the wire gauge. A possible exception to that would be the fuse for an inverter. Since we often over size the DC wires from battery to inverter to allow for minimal voltage drop that fuse can be sized to the maximum current draw of the inverter, as long as that amperage is smaller than what the wire is rated for.
I hope that explanation is clear; make sense.
Bruce's diagram has it right; at the top he rates the fuses by wire gauge.