PW owners, summer is coming/here. What is your reserve percentage?

[Electrph]

For export everything option, does the powerwall get drained down to the reserve percentage?

i dont personally have option to export from batt only new option to charge from grid outside of storm watch
i believe system would export to grid until peak time is over or you hit reserve whichever happens 1st .. others may be able to give real world use answers

 

[GJones]

timely question .. now that I can charge from the grid and i switched to time based controls from self powered my reserve seems less important .. lowest it hits is ~ 72% from running exclusively on batt 4-9 .. then at 8am powerwall charges up to 100%

You can charge from the grid in California ? My understanding is that the CPUC explicitly prohibits this except when Storm Watch is active for an event. I have seen some transient grid pulls once I activated the setting, but they have been very small and very brief - not at all anything that could be characterized as sustained charging.

 

[skepticcyclist]

You can charge from the grid in California ? My understanding is that the CPUC explicitly prohibits this except when Storm Watch is active for an event. I have seen some transient grid pulls once I activated the setting, but they have been very small and very brief - not at all anything that could be characterized as sustained charging.

Yes. I have it enabled on my system

 

[cwied]

For export everything option, does the powerwall get drained down to the reserve percentage?

Yes, unless your site export is set low enough that you don't hit reserve by the end of peak. I don't know whether it would export during shoulder if that happens.

 

[Electrph]

Yes. I have it enabled on my system

yes mine is enabled as well .. i did not see anything in my paperwork from SCE (utility) stating I could not ... though I did just quickly read through it when the app enabled this feature

 

[no2gates]

Depends on the weather.
If we have storms coming: 90%
Normal weather: 35%

 

[GRV0928]

5-15%, but most of the time it end up 30%-Up before the solar start charging the powerwall again… $0.46 per kw is not cheap and we used about 50-65kw a day…

 

[Dave[N]]

2PW + 4kWp, and I leave it set to 50% all year with storm watch disabled.
I have PG&E EV2A plan, so this time of year it usually charges to 100% before noon, and then nothing from the grid until midnight, when is switched back to off-peak.

 

[Fruitcake]

With summer it is now time for us to balance PW reserves versus A/C cooling and charging. What are people setting their reserve to?

We are at 40% so for 2 PW, 11.2 kWh. Thinking about going a little lower.

I reserve mine at 80% because I own my PWs mainly for energy resiliency and there is no time-shifting cost savings to be had where I live in NJ.

So I self-power 20% mainly to exercise the battery (slightly - lithium chemistries do not like deep discharges) and continuously monitor the system for faults.

 

[Aero-D]

Day 1 (not 1st full day) with Solar (7.7 kW AC) and 2x powerwalls. Going with 20% reserve, sunny tomorrow.

 

[lettcco]

100%. I have FPL and net-metering (for now), so it makes no sense for me to add extra cycles to my PW.

 

[astrorob]

since summer started, i had been setting my reserve (time-based) to just get thru being self-powered 3PM-12AM or something like 45% based on my usage. before "export everything" existed, this is all i could do to maximize $$. in the winter i needed to set the reserve higher (about 60%) since there wasn't enough solar available to get me back to 100% if i let it go down to 45%.

the other day i started experimenting with "export everything" and setting the reserve to 25%.

im now +$2 or so over where i was just exporting solar, but i find that the PW will just start at 4PM and go gangbusters for a few hours until it hits the reserve, and then i'm importing again during some part of peak and shoulder times. it seems like i do a little better money wise if i just "export everything" starting at 4PM until the PW hits about 65% and then switch back to solar-only export mode.

in theory this shouldn't make a difference money-wise (vs just letting the PW discharge itself entirely during peak) but somehow it seems to. i need to experiment more.

 

[nwashin1]

United Kingdom
2 PW + 5 Kw PV
Time-Based Control
Reserve set to 0%, Storm Watch switched off.
I want to keep my grid usage to a minimum.
I have a 21Kva generator if necessary...

 

[SailorDave]

I have 14k and 2 PW and have them set to 0% reserve. I want to minimize my grid pull and during the summer months with 2 AC units and 100f+ temps. I need all the backup I have and still do not make it through the night. If I see bad weather coming I now use charge from Grid so I can add some backup when necessary.

 

[dcoakley]

2x powerwall
10.54 kWh pv
Reserve for winter 40%, summer 10%

I like my ac too much…