Why does the 13.5kWH Powerwall2 only appear as 8kWH in Powerwall-Dashboard?

[davehatton]

Hi all,

Firstly, I'm a new Solar Panel / Powerwall2 owner, it has only been running for a week, and I want to say how much I appreciate the work done on Powerwall-Dashboard ... it is great.

Now my question that I can't find an answer for, maybe it is obvious and I'm missing something?

I understand the Powerwall2 has a capacity of 13.5kWH.

So far Powerwall-Dashboard shows my PW2 fully charged (100%) at 8kWH.
I see this on also on the examples pictures for this project and in screen shots in questions.

Why is it not 13.5kWH please? What am I missing?

[jgleigh]

Can you post a picture of what you're seeing?

[davehatton]

So I think I may have an answer to some extent for myself

In that picture, the y-axis only goes to 8kWH but now thinking about it, there is also 100%, so am I correct in thinking that the 100% is related to the red battery charge line and the 8kW is releated to house usage and solar generation.

It isn;t saying that 100% battery is at 8kW

Then I see on a lower graph by battery capacity

THis suggests my 13.5kWH PW2 has a 15kWH charge?

[jgleigh]

The top graph is instantaneous power, expressed in kW. The bottom graph is battery capacity expressed in kWh. One kW used for an hour equals one kWh.

[richardklam]

In addition, everything on the Top graph is scaled to kW and most of the units on the top graph is express in Power to the left. The SOC of the Powerwall is on the right side of the Top graph with units 100% to -100%. for Charge, Clouds, and Reserve parameters.

[davehatton]

Thank you for the replies, that cleared it up.