If you are looking for an Energy Storage System (ESS), SimpliPhi’s AccESS offers homeowners a better choice. With a built-in-inverter, the system is 100% plug-and-play making installation incredibly simple. SimpliPhi batteries can also be charged from any source - solar, wind, a generator or the grid. Most importantly, unlike the Powerwall, SimpliPhi AccESS’ LFP lithium ion chemistry contains no cobalt. This means that there is no risk of overheating or toxicity so that AccESS can be installed indoors or out, and requires no thermal monitoring or cooling equipment - which can be both expensive and space intensive.