-irrigation and waterlines in your garden
-power for lights and powerlines plus power-supply for charging station
-areas that will flood or build puddles when heavy rain falls
-obstacle like tree-stumps or rocks which the mower can climb
-garden furniture where the mower can get tangled up
-dog bones, branches of trees, toys and anything you would pickup when mowing with a normal mower
-any lawn edge that is changing with the seasons is a problem (agapanthus or other plants will grow into the path of mower)
-any lawn edge that has bumps and holes will send your mower astray
-any step-up from lawn to pavers or concrete areas
-unstable power-supply (use UPS)
-because of the harsh sun and rain we need hut or rain cover in New Zealand