The short pulse will not set fire to plants contacting the wires, nor injure humans or animals.
Electrical costs are minimal.
Deep cycle marine batteries are recommended for 12-volt energizers. Solar panels are simply a recharging system for battery powered energizers. Install 110-volt energizers in a shed, garage, or other building and bury insulated underground cable from the energizer to the fence. Protect your 110-volt energizer with a single outlet surge protector. Hang D-cell energizers directly from the fence wire.