Running house AC from truck during Peak hours

[dirtdiver]

This is why I’m setting up the HIS and can’t wait for ford to allow energy arbitrage.

What do you mean HIS?

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[Pitbull2o08]

What do you mean HIS?

Home Integration System

 

[bryan995]

We are in SD also, and use 2 x power walls to do exactly this. Even with 2 PWs, with a max output of 7.6 kW each, it was not enough to turn our AC compressors over. We had to also install soft-starts in both units. I don't think the truck will have enough amps to get things started.

With the PWs, we now never pull from the grid during the 4-9pm peak. We use the dedicated batteries to 'peak-shave'.

p.,s. SDGE peak on EV-TOU-5 is now $0.81 / kwh

 

[dirtdiver]

We are in SD also, and use 2 x power walls to do exactly this. Even with 2 PWs, with a max output of 7.6 kW each, it was not enough to turn our AC compressors over. We had to also install soft-starts in both units. I don't think the truck will have enough amps to get things started.

With the PWs, we now never pull from the grid during the 4-9pm peak. We use the dedicated batteries to 'peak-shave'.

p.,s. SDGE peak on EV-TOU-5 is now $0.81 / kwh

and the two power walls cost roughly what to buy and install?

 

[Zprime29]

We are in SD also, and use 2 x power walls to do exactly this. Even with 2 PWs, with a max output of 7.6 kW each, it was not enough to turn our AC compressors over. We had to also install soft-starts in both units. I don't think the truck will have enough amps to get things started.

With the PWs, we now never pull from the grid during the 4-9pm peak. We use the dedicated batteries to 'peak-shave'.

p.,s. SDGE peak on EV-TOU-5 is now $0.81 / kwh

Do you notice any difference in the AC using soft start? Half the reason I'm justifying the Lightning is to be able to run AC in the summer if a monsoon knocks out power. So this is very good information your sharing, thanks!

 

[bryan995]

and the two power walls cost roughly what to buy and install?

Not cheap, but neither is the HIS!

We paid 25k all-in after incentives for 2 x PW + 8 kW solar, 0.99% 10yr loan !
I am hoping that at some point tesla offers a V2G adapter plugin for powerwall/solar owners that can leverage the already installed equipment.

 

[bryan995]

Do you notice any difference in the AC using soft start? Half the reason I'm justifying the Lightning is to be able to run AC in the summer if a monsoon knocks out power. So this is very good information your sharing, thanks!

I don't, all i know is that now it takes less amps to start. Something like a 70% reduction. If we turn off the grid connection, the two powerwalls can now start both 3TON A/C without any issue. Before they would just buzz and do nothing . Tesla installed the devices for no extra charge. I think they cost something like $300-$400 each if you were to do this on your own. The install looked easy though (<15 mins).

 

[Pitbull2o08]

Not cheap, but neither is the HIS!

We paid 25k all-in after incentives for 2 x PW + 8 kW solar, 0.99% 10yr loan !
I am hoping that at some point tesla offers a V2G adapter plugin for powerwall/solar owners that can leverage the already installed equipment.

HIS is about 10k installed from SR, but I still woundn't work with Sun Run. I Have an indy guy installing my HIS and his friends HIS. I plan on passing his info around here as he'll likely be the SD guy to install a HIS without sun run soon.

It's important to remember Ford hasn't permitted energy arbitrage yet in the Ford app for the HIS. But they do have plans to do so according to their press release and expos, in 2023

 

[Zprime29]

I don't, all i know is that now it takes less amps to start. Something like a 70% reduction. If we turn off the grid connection, the two powerwalls can now start both 3TON A/C without any issue. Before they would just buzz and do nothing . Tesla installed the devices for no extra charge. I think they cost something like $300-$400 each if you were to do this on your own. The install looked easy though (<15 mins).

I'm definitely adding this to my list of things to get when I install my backup system. Thanks!

 

[bryan995]

I'm definitely adding this to my list of things to get when I install my backup system. Thanks!

It was this brand. Not sure of the exact model, but that likely depends on your AC unit.
https://www.electricgeneratorsdirec...wPzwlCrJm_36tL1L8lrjFPkZbLL_Tx8xoCaqEQAvD_BwE

 

[jk340]

Yes, Ive got a 10KW system already. I like the idea of tesla wall but I don't see how it would pay for itself.

Making the numbers work for you definitely depends on your situation, home construction, and environment.

For us one big concern we have is losing power. We have had at least 3 power outages a year the last 2-3 years. Some lasting upwards of 48 hours. We work from home, so no power directly impacts our income.

The Powerwalls also prevent having to buy power at the peak summer rates. In the warmer months we pre-cool the house by setting the thermostat down from approximately 11 AM-3PM and running the A/C with electricity produced from solar. We also have enough excess solar power during this period to fill the Powerwalls. Then at 3 PM until 8 PM which is our peak rate period, we run the house off the Powerwalls. The house does warm up during that time, but usually not enough to need the A/C so power consumption is minimal. The net is we don't consume grid power during these high-rate times. Our electrical bills have dropped from near $600/mo. in the summer and early fall to $10/mo. or so to cover the grid connection. We also usually send enough power back to the grid to cover most of the electrical power we consume in the late Fall and winter.

A few of considerations. We do have gas heating. We considered switching to heat pumps, but that greatly increases electrical consumption during winter when solar production is poor. A second item is we have upgraded the insulation throughout the house which has helped create a fairly tight thermal environment. We are in the inland part of the SF Bay Area. Winter temperatures range from upper 20s at night to mid 60s in day. In Summer we range from 50s at night to 110 on very hot evenings.

 

[jk340]

I don't, all i know is that now it takes less amps to start. Something like a 70% reduction. If we turn off the grid connection, the two powerwalls can now start both 3TON A/C without any issue. Before they would just buzz and do nothing . Tesla installed the devices for no extra charge. I think they cost something like $300-$400 each if you were to do this on your own. The install looked easy though (<15 mins).

We have one of these devices and it seems to work well. It lets our 4+ ton A/C start when under battery power. It just comes up to speed a little slower. Ours was included as part of a Tesla installation.

 

[yed19]

I would say that you should install Solar if you have not already ($0.58/KW ) and install a HIS at the same time and write off the install fees as a part of your financing. Has to be cheaper than that... This brings up a question as to whether or not the HIS is something you can write off as a part of that system. I believe it is since it has a BDI for solar in it. It may also depend on if you are using the BDI with solar.

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