That marks a sharp deterioration from a net loss of $1.4m for the comparable period in 2014.
The results were affected by lower electricity prices, euro-dollar exchange rates and the impairment of capitalised development costs in Chile.
However, the company saw steady revenues of $17.2m, compared with $17.8m in the second quarter of last year.
Earnings before interest, tax, depreciation and amortisation dropped to $9.2m
