The L2 chargers are often quite programmable to e.g. use the cheaper late-night electricity. And because what new gadget these days doesn't come with software a

The L2 chargers are often quite programmable to e.g. use the cheaper late-night electricity. And because what new gadget these days doesn't come with software and an iPhone app? And some chargers would have an integrated meter as well. Would this suit you? But we don't really know what your intended for that meter use is.