This is the amazing bit – the daily running costs of robot mowers and automowers- are just the cost of electricity needed to recharge their batteries. This cost amounts to approx £40.00 / year. It is advised to get your automower / robotic mower serviced each year (and to also get a software update – which gives you the benefit of all improvements as they become available ). You may also with to change the blades ( the Husqvarna automowers often come with spares sets of blades included ).
Other than that – there are no running costs.