[RE-wrenches] Sonnen Battery & Outback Radian Inverter

[Chris Mason]

On Sat, Jun 18, 2016 at 11:30 PM, Gary Willett <Gary at icarussolarservices.com
> wrote:

>
> Page 14: I am assuming that the Sonnen system is comprised of the
> components and functionality encompassed in the box in the upper right side
> of figure 2. And the Outback Radian is the inverter used for "F" - the
> "Storage System" inverter?
>
Correct, although the consumption meter is also included. They supply the
external metering which you have to install externally in the PV supply
cabling.


> Pages 14, 15, and 29: No info on PV array sizing is provided. Does the
> Sonnen design assume that a totally separate grid-tied inverter system
> already exists or must be installed if PV charging is desired?
>
The PV design depends on the consumption model, how much battery, but they
do advocate no more than 8KW, which is what we are using on the
installation. I think you could use about 4kW quite easily for a ECO16. It
depends on the daily consumption of the home.

> Page 15: The system is AC coupled. When in "Backup Mode" how does the
> Sonnen BMS control charging from the external grid-tied PV inverter system
> once its battery modules are fully charged and the house loads are low?
> Does the Sonnen BMS handle this situation without disconnecting relays or
> frequency-shift throttling?
>
Frequency shift. It will change the micro-grid frequency to 60.9hz

> Page 15: Is the nomenclature in Figure 2 for the Utility Power Meter "G"
> and the Consumption Meter "D"  reversed?
>
 G should be "Home". Not sure what they were doing there, I will let them
know.
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