Earlier this year, Congress authorized a total of $9 billion in loan guarantees over three years.
The renewable-energy law entitles anybody who puts in a solar panel or a windmill to sell surplus power to the grid, receiving a generous "feed-in tariff" guaranteed over 20 years.
For a start, it could prove more expensive; it has $8 billion more in guaranteed spending over the next decade.
The Eagles president, Joe Banner, refused to comment on reports that the contract contained $13 million in guaranteed money over the first three years.
In the House of Commons on Monday, Foreign Secretary William Hague was praised on all sides for the UK's part in the deal, which is initially for six months and will see some sanctions on Iran eased in return for guarantees over uranium enrichment and greater access for UN inspectors.
In addition to the $45 billion in actual cash the government handed over, the government is guaranteed $306 billion dollars more in guarantees of mostly toxic securities.
He agreed to resign as president and in return was given guarantees over his safety.
Plaid Cymru leader Leanne Wood, who is campaigning for a Yes vote in Scotland, said the First Minister Carwyn Jones has failed to stand up for Wales in terms of getting guarantees over future funding.
The contract included $20 million in guarantees.
The threat comes as Ratan Tata, the group's chairman, in turn warned there were no guarantees over job safety.
