This morning we reached a new high for the credit we've built up in terms of net exported energy - 1,753 kWh. The previous high was 1,738 on December 3rd, then it dropped to a low of 1,477 on January 28th. This winter we were net importers in December and January, and I discovered to my dismay that even though I'd built up a credit of over $300 with Nstar, I was getting billed for the energy we imported. Looking closely, I learned that I had Nstar as my energy delivery company, and Coned Solutions, via Cape Light Compact, our municipal aggregator and default supplier, as my energy supply company. Having two separate companies is part of the deregulation process - you get a choice of who supplies the energy, but not who delivers it (owns the wires). It turns out that Nstar credit doesn't offset Coned supply charges. The simple solution, that doesn't make Cape Light Compact happy, is to switch to Nstar as the energy supply company. The rates are within hundredths of a cent per kWh, but that actually doesn't matter if we are net exporters - in fact, a higher rate allows us to build up a larger credit, which we could allocate to another meter.