The Basslink (/ˈbæslɪŋk/[2]) electricity interconnector is a 370 km (230 mi) 500 MW (670,000 hp) high-voltage direct current (HVDC) cable linking the electricity grids of the states of Victoria and Tasmania in Australia, crossing Bass Strait, connecting the Loy Yang Power Station, Victoria on the Australian mainland to the George Town substation in northern Tasmania.

Financial benefits from the Basslink investment included reduced or deferred need to invest in further base load generation facilities, and potential to profit from selling peak load power into a market in which prices are generally higher, and because the cable was also used to supply power to Tasmania in times of drought, as most of Tasmania's electricity generation is hydroelectricity.

A government review of Basslink in 2011 found, "Basslink-related costs have been around $130 million ($ nominal) greater than the actual revenue benefits... [However] Taking both direct and indirect sources of value [such as increased energy security in times of drought] together, Hydro Tasmania concludes that over the period 2006-07 to 2010-11 the average net benefit of Basslink to its business is in excess of $40 million per annum".

At midnight on the morning of Saturday, 29 April 2006, the link was officially enabled for commercial trading of energy on the National Electricity Market.

[8] Hydro Tasmania pays a Basslink interconnector facility fee for the transport of the electrical energy of about AU$70 million p.a.

[14] On 12 November 2021, the companies that owned and operated the Basslink undersea power cable between Tasmania and Victoria were placed into voluntary administration.

[24][25][26] The Tasmanian Government uses it, as well as the TasGovNet fibre backbone, as part of the Connect Tasmania Core infrastructure, to facilitate a more competitive telecommunications industry within the state.