The SNP will stand up for Scotland's energy industry by demanding reforms to the UK's "punitive" transmission charging regime, the party has pledged in its election manifesto.
The current the system forces generators in Scotland to pay "huge fees" to connect to the grid, according to the document. Meanwhile generators in the south of England "receive subsidies".
"The SNP will continue to demand the reform of the punitive transmission charging regime, which has come to symbolise the UK government's repeated failure to deliver energy policies which meet Scotland's needs," the manifesto promises.
It says this "unfair" system played a role in the closures of the Longannet and Cockenzie coal-fired power stations and "must be overhauled".
Generators which connect to the transmission network are required to pay Transmission Network Use of System (TNUoS) charges.
The charges include a locational element which reflects the cost of reinforcing the network to accommodate new generation in different areas.
The locational charges in Scotland are generally higher than the rest of the UK, in particular the south of England, where they are often negative.
The SNP manifesto also promises to create a regulatory environment which encourages investment in energy storage schemes, including pumped hydro and batteries.