Volvo Penta has begun final field testing on its newest Tier 4 interim product, the 16L, 625 kW generator engine, model TWD1663GE. “The 1663 has been developed to be a prime and standby power product in the 550-625 kW ranges,” said Phil Gaynor, Director, Volvo Penta's Industrial Engine Business. “This power node allows us to expand our top-of-the-line 16L product range into the rapidly growing prime power market, where single, twin and triple generator systems are becoming very popular,” he added. The 1663 utilises Volvo's Selective Catalytic Reduction (SCR) emissions solution, now used not only at Volvo Penta, but also across both the Volvo and Mack Truck US10 product lines. Volvo Penta, Volvo Truck and Volvo Construction Equipment, all part of Volvo Group AB, share many of the same base engines produced by Volvo PowerTrain. Volvo Penta offers SCR solutions for variable speed off-highway engines and, now, this constant speed generator engine. The maximum power output of the 1663, for standby power applications is 625 kW. This output is optimal for generator manufacturers choosing to link multiple generator sets together to offer 1.25 mW, 1.875 mW, and 2.5 mW power blocks to their customers.