Bruce,
if they are stand alone they work. I guess you need to decouple completely from the grid. I am no expert but that is how I understand it.
At best our batteries store 4.2 kWh when full. In winter I am lucky to generate 5 kWh so most goes to use not the batteries. Today for example we generated 4.8kWh and 2 kWh was stored but that is the best day in 5 days , on the others we stored 0 kWh .
They really come into use in Spring through autumn when normally we buy in 4-5 kWh per day and this falls to 0.6-2 kWh per day.
Now I understand, many thanks.
