Old School Tech has released a product review for the Bestek 300 watt pure sine wave 12 volt inverter. Pros: this fairly rugged unit, for the price, produces a nice sine wave, albeit at a marginal no-load 109 volts, and is acceptable for small inductive loads or any small load over lengths of extension cords. Cons: the available output is a fraction of the rated 300 watt continuous / 700 watt surge, and was unable to start our 70 watt freezer. Also tested were a pair of NOCO battery adapters. The bottom line is that while it would be good to have such a unit on hand, a 24 volt array remains the preferred choice for any serious loads.