These EG4 batteries from Signature Solar look like a pretty good deal to me; $265/kWh according to their calculation. I paid a little over $500/kWh for some 12V form-factor lithium batteries at the start of the year and thought those were a reasonable price.
Currently the best hybrid inverter has got to be the EG4 18KPV Inverter with the Sol-Ark 15K coming in second only due to the $2,600 price difference. Both of these inverters can do it all. They are relatively easy to install, can be used with a small system and can scale up to handle a 200 amp system with as little as three...