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@ohmman, wonderful news. With what versions of EG and App? Thanks, Harry E. ===

Upgrading solar array systems based on string inverters is problematic. Micro-inverter panel based systems can be upgraded/expanded just by adding extra panels because each panel is independent of others and is not limited to a string-based inverter.

@PaulSawyer, do you happen to have the URI's to interrogate the status and/or control the state of the (solar) transfer switch(s) within the EG? We "know" some EG URI's to get certain information (eg: meter statistics) of which some of these include battery SoC, Grid and Solar generation and...

I have seen this behaviour but it appears to be tied to the App version 3.2.1 because my PW-2 GW is still on v1.6.0. If you compare the graphics shown per your screenshots to the individual statistics (from each power flow source/destination) then the values appear to be more "normal". I also...

I would answer your survey but without knowing your power consumption the answer I'd give is not listed but I'd increase panel count first if possible.

If you look at Mar through Sep there appears to be enough power to recharge one PW-2. This depends on how much power you use each day. With such a system, look at the statistics over a longer period (per year for example). On some days (for possibly several days) you may not get enough Solar...

Humm, in post #6 above; (with the image of the battery at 4%) can't you scroll down - this is where the "Customise" button is in the Android App. Cheers, Harry E. ===

Don't expect to be able to make money out of installing solar and/or Powerwalls :-) The Power Companies beat you to it.

@BobPaul, I would see this as a completely different issue. If you are referring to an off-grid system then your site is a stand-alone installation so you would not be using grid-connected inverters etc. In the installation I describe above this is grid connected so the most important factor...

@fresnoboy, From the electrical wiring perspective: If you are in the fortuitous position of building a home from scratch I'd recommend separating your wiring into 2 or 3 specific areas. 1. Essential loads 2. General purpose loads 3. Luxury loads Or whatever is appropriate for your needs...

@fresnoboy, Just a comment on choice of Solar panels. Installed 6.5 kW of micro-inverter based panels (SolarBridge before they were absorbed :)) and would not choose anything other. As far as convenience (can add panels on the fly), production, reliability and longevity goes I don't believe...

@FlyReaFast, To expand on operations and features, there is a "backup" "option" (it was ordered and supplied fitted as part of my original order for my region [Australia]) for the PW-2 that provides a sub-second switch-over much like or more exactly like a UPS. In "Self-Powered" mode: A. Grid...

@prash, Can't answer question 2 sorry. For question 1, currently the PW-2 operates in one of 2 modes. Mode 1 is "Backup-Only" whereby 100% of available battery power is reserved for grid outages. In this mode it will charge from the grid (and/or Solar if you have available). The general...

We are talking about the PW-2-AC version (inbuilt inverter)? If not this may be a limit imposed by your configuration. With my installation, the PW-2 can provide or consume 5 kW continuous depending if its discharging or charging respectively so I don't see why your unit is limited to less...

@Shygar, What's with this "the battery will dump..."? There is no reason for a fully charged battery to do anything. If the battery is full and your load is minimal any Solar will go to the grid and the battery will be in standby/idle mode. One of the settings via the Wizard is to...

@Shygar, A few questions: 1. What is the max power your Solar array can produce? 2. What is the baseload for your consumption? 3. What is the setting you have for Reserve (ie: grid outage)? At the rate they quote and assuming you don't draw any power it would take about 8-9 hours to fully...

I have one PW-2 with ~6 kW Solar. I have seen the PW-2 charge at up to 5 kW from solar. Once when I set the Reserve value higher than normal for a scheduled grid outage, I noted the PW-2 charging from the grid I noted the PW-2 charging at a lower rate. IIRC it was somewhere around 3-3.5 kW...

From what I have seen it only charges from the grid if the battery SoC current percent is less than the Reserve percentage. If the unit is in Backup-only mode this sets the Reserve percent to 100% so the grid should be used to get to 100%. If not in Backup-only mode, the Grid is used to get...

@zanary, thanks - that link you posted arose from an original question I had posted. @sashton replied and provided some basics to which I have also contributed. Yes building a Custom data collection system is OK and what I am working on at this time but if Tesla was working within the confines...

The graphic shows your PW-2 is not fully charged (dark green vertical bar). Although you have set 100% Reserve via the App, I "think" you will find if you check this setting via the Wizard it will show something less than the current charge level and this is using the solar to charge above the...

@gkennedy, how do you change the battery Reserve value? I am on PW-2 v1.6.0 firmware and App Version 3.2.0 and the only way I can change it is via the Wizard. The option to do this via the App is there but it does not work. I just ran the Wizard to see if I could get a firmware update (but it...

For my installation with the backup option installed: 1. In Self-powered mode (normal) and grid fails no disruptions to computer or other power sensitive equipment 2. In Backup-only mode and grid fails, there is a delay of some seconds and all computer and other equipment stops I have chosen...

@zanary, thanks for the doc set. This the same as I have already seen. What I mean is: 1. Technical Specifications (really deep not Consumer summary) 2. Theory of Operation 3. Documented behaviours as per what we seem to be discovering and posting here :) 4. RESTful interface API's Given...

@dlieu: We are referring to a Powerwall-2 AC unit - with internal battery charger/inverter right? The PW-2 specs state it has a 100% DoD tolerance so I can't see why you can't do that if you want to. Mine is set to 25% reserve to cover me for grid failures/brownouts (we get a lot where I...

@dlieu: "(updated) Can confirm this doesn't work. It just switches PW into discharge mode until reserve is reached (after that to grid) but no self-powered menu and switch back and forth between backup and self-powered. Maybe it needs more time? dunno. I did try to re-install and re-log into...

If anyone from Tesla is reading this post, I would also be happy to test the TOU software because I could set the PW-2 to ignore providing battery power while cooking the evening meal and then have the PW-2 provide all overnight power until the sun comes up again. ATM, I run out of battery...

With a Solar array connected yes. Having set my PW-2 to "backup-only" (in preparation for a scheduled grid outage) was when I noticed the lag in switch-over when the grid went down. Had I had left it as it was (normal self-consumption and backup but set to self-consumption as shown in the App)...

@gslavenburg, the Wizard is the post install/commissioning procedure invoked from the main GUI of the Energy Gateway. One of the setup pages has "backup" or "self-consumption" check box selections. I'd say since you do not have Solar, the "backup-only" option was the only option selected...

I have not tried it because I do have Solar but can't you run the wizard and "fool" it into thinking you do have solar so you can set the "self-powered" mode?

I have noted that if the PW-2 is set to "backup-only" and the grid fails, there is a distinct delay of some time - enough to cause my computer equipment to reboot. If set to "Self-powered" the transition to battery on grid fail is almost instant - fast enough to function as a UPS. So, if you...

I was going to use a separate circuit to isolate the PW-2 and supply just critical loads. I decided to go against that idea and just backup the whole house. I'm glad I did because the total house load is mostly less than the 5Kw so I see much more self consumption than I would have had I...

The only settings I have changed (or want/need) to are the: 1. Reserve level - ie: in anticipation of scheduled outage I raise this value in case the weather turns bad 2. The TCP/IP address and/or default gateway Not that the IP address needs changing but I have noticed that with firmware...

@Ulmo, many thanks for your investigations. I don't see in this thread that you found the Battery SoC and also mentioned the PW-2 firmware version. Here are some additional URI's to add to you original meter statistics. (This is just a copy of what I've found but I have not yet investigated...

Feel free to disagree but it's mostly the heat. Charge to some percentage, disconnect and let batteries cool down then reconnect; rinse and repeat; The ability to do this programatically would be ideal and not that difficult assuming one has a temperature sensor on the batteries being charged...

@pete8314, Another chap and I have some starters: try this link: Rest Interface for Powerwall 2 Energy Gateway | Tesla Cheers, Harry E. ===

The PW-2 uses GMT (Zulu) time. The App should get the time from the system (Android or iPhone) and use that to convert PW-2 times to local. Restart the App and/or you phone/tables device and it should be ok. Cheers, Harry E. ===