In addition to Victron, for high end residential systems / commercial systems which require more than 16kWh of storage and a power output from 6kW to 250kW, as well as total functionality in a power cut, there is the SMA Flexible Storage System.
The SMA system is built to a very high specification with superb back up and support. It is modular, can be expanded in the future and allows maximum flexibility. For systems with off-grid functionality it allows a 2 to 1 ratio of PV output (kW) to battery charger rating (kW) – this is the highest we have found on the market.
SMA produces a list of lithium ion batteries compatible with their Flexible Storage System. Their Sunny Island inverters can be coupled to build very large storage systems, in combination with some of our favoured batteries, LG Chem and TESVOLT.
Here are some of the key features of the SMA Sunny Island: