About ZEF Energy: ZEF Energy is a provider for software, hardware and support for Electric Vehicle chargers. ZEF offers one of the smartest and most rugged Level 2 chargers and DCFCs on the market with a focus on revenue grade metering, advanced control, owner reporting, and driver billing and messaging. The ZEF Energy 5-Year Advantageā„¢ included in all EV chargers provides the longest product warranty in the industry with the strongest cell coverage and support.