TIU Canada’s Vita Solar is one of several dozen small renewable companies that are suing for nearly $18 million from the Guaranteed Buyer, the state company that is obliged to buy power from renewable developers. By the end of next year, the Guaranteed Buyer is to pay almost $1 billion in overdue electricity bills. Two weeks ago the Rada passed at first reading a bill to extend state guarantees to ‘green bonds’ that the government would launch to cover the debt.