Conventional trailer refrigeration units are consume more fuel, make more noise and are less reliable than current generation electric refrigeration units.
This is why at South West Express, we only purchase refrigeration units for trailers that are capable of being placed on electric standby. This approach means that when ever a trailer is parked at a depot for an extended period of time, they are plugged in to either mains or solar power which is more efficient, and produces only a fraction of the emissions that an idling truck would. In the event of a power outage, the refrigeration unit automatically switch over to the on board diesel motor, which drives the on board generator.
This procedural stance by South West Express has not only reduced the overall running costs of these refrigeration plants while storing refrigerated goods, but has also reduced our carbon foot print.