<div dir="ltr">Hi Dave -<div><br></div><div>I keep hearing that Tesla is having a hard time keeping up with demand, so they may not be very motivated to add more dealers at this point. Just speculation.</div><div><br></div><div>Yes, the max continuous and peak powers add as you add up as you add more powerwalls. Energy capacity adds too. Yes, Powerwall has liquid cooling - I don't know what type of fluid it is. According to the Powerwall newsletter I received, the Powerwall will heat itself with the liquid cooling/heating system to deal with sub-freezing conditions. This will use some energy. </div><div><br></div><div>August</div><div><br></div><div class="gmail_extra"><div class="gmail_quote">On Tue, Feb 13, 2018 at 10:14 AM, Dave Angelini Offgrid Solar <span dir="ltr"><<a href="mailto:offgridsolar@sti.net" target="_blank">offgridsolar@sti.net</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">The AC powerwall has cooling, it is a liquid? Anyone know if the 5kw<br>
continuous and 7kw peak limits change with multiple units?<br>
<span class=""><br>
<br>
Dave Angelini Offgrid Solar<br>
"we go where powerlines don't"<br>
<a href="http://members.sti.net/offgridsolar/" rel="noreferrer" target="_blank">http://members.sti.net/<wbr>offgridsolar/</a><br>
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<br>
</span><span class="">> I think that this may have come up before, but I do not remember there<br>
> being a resolution:<br>
> Do you guys have any tips on becoming a Tesla dealer? We have people ask<br>
> about it all the time, but we have not been able to get Tesla to respond.<br>
> We have installed Sonnen, which is also a great system, but the up front<br>
> expense scares many people away. We are located in upstate NY which may<br>
> have something to do with it.<br>
><br>
> Cheers,<br>
> Dave<br>
><br>
><br>
</span>> *--*<br>
><br>
><br>
> *Dave Tedeyan*<br>
> *Senior Engineer*<br>
><br>
> *Taitem Engineering, PC*<br>
<div><div class="h5">> 10 Verizon Lane, Lansing, NY 14882<br>
> Voice: <a href="tel:%28607%29%20930-3481%20x6" value="+16079303481">(607) 930-3481 x6</a><br>
> <a href="http://www.taitem.com" rel="noreferrer" target="_blank">www.taitem.com</a><br>
><br>
> On Tue, Feb 13, 2018 at 10:36 AM, August Goers <<a href="mailto:august@luminalt.com">august@luminalt.com</a>><br>
> wrote:<br>
><br>
>> Marco,<br>
>><br>
>> Thanks for sharing, it is good to hear details from an installer who is<br>
>> living with a Powerwall. We starting selling the Powerwall 2 in 2017 and<br>
>> have worked up a large pipeline. We have about 20 installed so far, but<br>
>> are<br>
>> still waiting on utility permission to operate which is taking a long<br>
>> time.<br>
>> We have spent a good deal of time commissioning and testing each system.<br>
>> For the most part, our experience has been good although the<br>
>> commissioning<br>
>> software and internet connectivity features have been buggy. Hopefully<br>
>> those are issues that will be ironed out by Tesla. Otherwise, we've had<br>
>> the<br>
>> systems correctly operate in on-grid and off-grid modes with both<br>
>> Solaredge<br>
>> and SunPower Equinox AC coupled systems.<br>
>><br>
>> We installed conventional lead acid battery backup systems for over 10<br>
>> years and I can confidently say that Tesla's Powerwall and Gateway setup<br>
>> is truly market-disruptive. The design flexibility of the Gateway setup,<br>
>> the small size, minimal labor to install, and performance blow other<br>
>> systems out of the water. I hope that other manufacturers are able to<br>
>> catch<br>
>> up with this type of design.<br>
>><br>
>> Best,<br>
>><br>
>> August<br>
>><br>
</div></div>>> *August Goers*<br>
>><br>
>> Luminalt Energy Corporation<br>
>><br>
>> o: <a href="tel:415.641.4000" value="+14156414000">415.641.4000</a> <(415)%20641-4000><br>
<span class="">>><br>
>> <a href="http://www.luminalt.com" rel="noreferrer" target="_blank">www.luminalt.com</a><br>
>><br>
>><br>
>><br>
>> On Sat, Feb 10, 2018 at 12:23 PM, Marco Mangelsdorf<br>
>> <<a href="mailto:marco@pvthawaii.com">marco@pvthawaii.com</a>><br>
>> wrote:<br>
>><br>
>>><br>
>>><br>
</span>>>> *Aloha Wrenches,*<br>
>>><br>
>>><br>
>>> *I thought I'd share my own experiences with the Powerwall as my<br>
<span class="">>>> company<br>
>>> is now launching a program to add PW to existing NEM systems since the<br>
>>> vast<br>
>>> majority of them do not have storage which means that if the grid goes<br>
>>> down, so does their PV system. (With the exception of the SMA SB line<br>
>>> and<br>
</span>>>> their Secure Power Supply.)*<br>
>>><br>
>>><br>
>>> *And no, I'm not a shill or toadie for Tesla.*<br>
>>><br>
>>><br>
>>> *marco *<br>
>>><br>
>>> *I wanted to walk my own talk. Before we launched adding Powerwall to<br>
<span class="">>>> existing Net Energy Metered solar electric systems, I wanted to make<br>
>>> sure<br>
>>> that what was promised on paper would work in the real world. I added<br>
>>> Powerwall to my NEM system last year and have been monitoring and<br>
>>> testing<br>
</span>>>> it during normal grid-on and grid outage modes. And Iâ\u20ac\u2122m very pleased<br>
>>> to<br>
>>> report that Powerwall has performed flawlessly and as expected.*<br>
>>><br>
>>><br>
>>><br>
>>> *When used in a NEM system, Powerwall is programmed to be in<br>
>>> â\u20ac\u0153Backupâ\u20ac<br>
<span class="">>>> mode. When utility power is on, Powerwall stands ready in a full state<br>
>>> of<br>
>>> charge for any power outage. During normal grid-on conditions, my<br>
>>> Powerall<br>
>>> takes about .6 kilowatt-hours every other day to stay fully charged.<br>
>>> Over<br>
</span>>>> the course of the month, this Powerwallâ\u20ac\u2122s electricity consumption<br>
>>> comes to<br>
>>> about 9 kWhs or about $3/month at the current HELCO R rate.*<br>
>>><br>
>>><br>
>>><br>
>>> *I have turned the utility power off to my home on a number of<br>
<span class="">>>> occasions<br>
>>> in order to experience how Powerwall would perform in a simulated grid<br>
>>> outage. When the grid goes down, my house effectively becomes a<br>
>>> self-generating micro-grid. That is, my photovoltaic system (solar<br>
>>> modules<br>
>>> and inverters) and Powerwall (battery storage and integrated inverter)<br>
>>> form<br>
>>> a power grid with energy being created and stored and then consumed by<br>
>>> my<br>
</span>>>> electric loads.*<br>
>>><br>
>>><br>
>>><br>
>>> *Several things I noted from my simulated grid outages:*<br>
>>><br>
>>> *· I purposefully overloaded Powerwall by turning on my<br>
<span class="">>>> electric<br>
>>> dryer and electric oven at the same time. As expected, since the<br>
>>> maximum<br>
>>> output of Powerwall is 5 kilowatts, it shutdown. Meaning that all the<br>
>>> power in my house went off. Within seconds, Powerwall reset itself and<br>
>>> the<br>
>>> power came back on, with the dryer and oven having shut down after the<br>
>>> power went off. If power does not come back on after your Powerwall<br>
>>> trips<br>
>>> off, you will need to turn off those high-power loads and reset<br>
>>> Powerwall<br>
>>> by turning its black on-off switch, located on the right side of the<br>
>>> unit,<br>
>>> from on to off and then on again. The important takeaway: during a<br>
>>> utility<br>
>>> outage, you will need to be careful as far as operating heavy electric<br>
>>> loads, especially 240 volt appliances both from the perspective of<br>
>>> overloading your Powerwall and rapidly drawing down the battery<br>
>>> capacity,<br>
</span>>>> especially at night.*<br>
>>><br>
>>> *· The magic of frequency shifting. Without getting into too<br>
<span class="">>>> much techno-talk, this is the story of frequency shifting. Normal<br>
>>> utility<br>
>>> frequency is 60 hertz (Hz). PV inverters require the utility frequency<br>
>>> to<br>
>>> be at or near 60 Hz in order to operate. During a grid outage,<br>
>>> Powerwall<br>
>>> effectively establishes grid quality power (120/240 volts at 60 Hz),<br>
>>> allowing a micro grid to operate with solar providing power to your<br>
>>> house<br>
>>> loads (during daylight hours) and charge Powerwall as needed. During<br>
>>> the<br>
>>> day with the loads being met by your PV system and Powerwall being at<br>
>>> or<br>
>>> near full state of charge (97-100 percent), Powerwall will shift the<br>
>>> frequency from 60 to 66 Hz in order to turn off the PV inverter(s).<br>
>>> That<br>
>>> is, the PV inverter(s) see the frequency out of spec and shut down as<br>
</span>>>> theyâ\u20ac\u2122re expected and required to do. Why? Because with Powerwall at<br>
>>> or<br>
>>> near full and the house loads being met, thereâ\u20ac\u2122s nowhere for any<br>
<span class="">>>> additional<br>
>>> solar generation to go. Powerwall will wait for its the state of<br>
>>> charge to<br>
>>> drop below 96-97 percent before shifting the frequency back to 60 Hz<br>
>>> which<br>
>>> allows the PV system to restart and generate solar power again. This<br>
>>> frequency shifting can take place repeatedly over the course of the day<br>
>>> depending on load demands, solar potential and Powerwall state of<br>
>>> charge<br>
</span>>>> and is perfectly normal and does not damage the PV inverters.*<br>
>>><br>
>>> *· **66 Hz and home appliances: when Powerwall is at 66 Hz,<br>
<span class="">>>> some<br>
>>> of your house loads may be affected. What I and other Powerwall owners<br>
>>> have noticed, while not a comprehensive list, can include: electronic<br>
>>> clocks running fast, motors sounding different (microwave, washing<br>
>>> machine,<br>
>>> pumps), uninterruptible power sources (UPS) not charging and going into<br>
</span>>>> back-up power mode, appliances having a computer behaving unusually.*<br>
<div class="HOEnZb"><div class="h5">>>><br>
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</div></div><span class="im HOEnZb">Dave Angelini Offgrid Solar<br>
"we go where powerlines don't"<br>
<a href="http://members.sti.net/offgridsolar/" rel="noreferrer" target="_blank">http://members.sti.net/<wbr>offgridsolar/</a><br>
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