Given the many options, how can you determine the best choice for your system? One differentiating factor is the device’s ability to either estimate the savings and costs of PV generation and building consumption, or to accurately calculate it given the homeowner’s utility rate schedule. Estimation based on a single approximate energy cost per kWh offers only a rough view of system performance, while accurate calculations allow the homeowner to do real analysis of generation and conservation effects on their actual utility charges.
