To make a long story short, the stupid Zappi can’t distinguish between solar generation and juice stored in the battery. It sees them both as “excess solar” and will let the Tesla charge from the storage battery at 12.30 at night while the battery is trying to charge from the grid.
So to manage this the car is set to charge first , followed be the house battery. They have to share this 4 hour period of 5p juice in that order.
Ok... this isn't right...
That's exactly what my system did before I complained and did these changes...
- Update your Zappy Firmware to the latest Version. Then select 'avoid battery drain' in the Zappy Menu.
See below how to set the Zappi V2 to avoid draining the battery. This should have been done at point of installation
You can tell if the Myenergi products can see your battery if you go onto the app you should be able to see your Grid Supply, Solar PV, EDDI, Zappi V2 and Battery. If there is no battery on the app then it is likely the Zappi will be draining the battery, as it will take the energy from any power source as long as it is delivering the charge. You may be missing a CT Clamp on the battery cables.
To set the Zappi V2 to the “Avoid Drain” function, please see below;
- Go to the Zappi Menu.
- Scroll to “Other Settings”.
- Scroll to “Advanced”.
- Select “Grid Supply”.
- Scroll to “Network”.
- Scroll down to “Battery” and select “Avoid Drain”
Use the up and down arrows on the charging point to set the function to “Avoid Drain”.
Press the three dashes button until you get to the main screen (where you started) again.
>>>>>>>>>>>>>>>>>>>>>
Now our system can charge our car AND the Powerwalls at the same time.
See download chart below...
As it's coming off dual charging, the step is the car finishing first, as it continues with the Powerwalls for a bit longer.
Tesla can tell you what your charging rate limit is... this is set by your installer, phone them and also ask for a Powerwall Firmware update.
Telephone Tesla Support on :
01628 450630
OR
Email:
[email protected]