Does Powerwall 3 support powershare now with no need for gateway?

[rjmcinnis]

They're supposed to be installing a SPAN IO panel today and I look forward to being able to see more about what's using what in the house.

My heat pump, water heater and heat pump HVAC both appear to use about 500 w or so when they're actively running. When the HVAC's not running the heat pump it's still running a fan but I've not really been able to detect that running. The old HVAC without a heat pump. I'm sure drew a lot more power when it kicked on 5 or 10 minutes every hour.

Would love to get SPAN, but would need two of them with my 2x200a service. Wish they had offered it at build time, but unfortunately while they are a good builder, they are just not enough of a tech forward builder.

How small is your HVAC? Or what efficiency? My 5-ton Heat Pump uses ~3500w, but it's a 15.5 SEER. I wanted to upgrade to a higher SEER (specifically for the variable fan) , but it was considered a "structural option" and had already been approved/permitted prior to close, so couldn't change it.

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[Tanquen]

Would love to get SPAN, but would need two of them with my 2x200a service. Wish they had offered it at build time, but unfortunately while they are a good builder, they are just not enough of a tech forward builder.

How small is your HVAC? Or what efficiency? My 5-ton Heat Pump uses ~3500w, but it's a 15.5 SEER. I wanted to upgrade to a higher SEER (specifically for the variable fan) , but it was considered a "structural option" and had already been approved/permitted prior to close, so couldn't change it.

PVA-A24AA7
Air Handler

PUZ-A24NHA7
Compressor

SUBMITTAL DATA: PVA-A24AA7 & PUZ-HA24NHA 24,000 BTU/H AIR HANDLER AIR-CONDITIONING SYSTEM

I have been told a few different places that too big for my 800 square foot home, will short cycle, will be less efficient and wear out sooner.

I tried to do as much research as I could before purchasing but I still feel like I got scammed. Not to mention it's $28k for the new HVA system and the hardware is about $8k.

Right now my house is drawing 2.6 kilowatts.

I have a 300 Watt baseline.

So this is the HVAC heat pump heating actively running, the water heater heat pump heating water actively running and about 400 watts or so for my computer workstation.

I guess I thought Power draw hip pump less and Oregon more consistent?
Heating (at 47°F)1,920 W2,300 W

If my math is right my house's baseline a little over six kilowatt hours a day out of the 26kWh or so it uses each day. It's using a lot more than I thought it would.

It's the worst time of year for the system and I'm generating as little as 8kWh a day. Three days ago we had no cloud cover and generated 22.2kWh on a 9.5 kW system.

 

[txtravwill]

You guys think we'll get the software maybe in Q1 2026 now to enable Powerwalls+PowerShare?
Approaching ~2 years of waiting and delays.

 

[Coolhandz]

PVA-A24AA7
Air Handler

PUZ-A24NHA7
Compressor

SUBMITTAL DATA: PVA-A24AA7 & PUZ-HA24NHA 24,000 BTU/H AIR HANDLER AIR-CONDITIONING SYSTEM

I have been told a few different places that too big for my 800 square foot home, will short cycle, will be less efficient and wear out sooner.

I tried to do as much research as I could before purchasing but I still feel like I got scammed. Not to mention it's $28k for the new HVA system and the hardware is about $8k.

Right now my house is drawing 2.6 kilowatts.

I have a 300 Watt baseline.

So this is the HVAC heat pump heating actively running, the water heater heat pump heating water actively running and about 400 watts or so for my computer workstation.

I guess I thought Power draw hip pump less and Oregon more consistent?
Heating (at 47°F)1,920 W2,300 W

If my math is right my house's baseline a little over six kilowatt hours a day out of the 26kWh or so it uses each day. It's using a lot more than I thought it would.

It's the worst time of year for the system and I'm generating as little as 8kWh a day. Three days ago we had no cloud cover and generated 22.2kWh on a 9.5 kW system.

Probably a bit big for 800 sqft, but they are both variable speed inverter and dc motor. Shouldn't short cycle. If it was single speed, then yes, it would definitely short cycle. Good pick.

 

[Tanquen]

Probably a bit big for 800 sqft, but they are both variable speed inverter and dc motor. Shouldn't short cycle. If it was single speed, then yes, it would definitely short cycle. Good pick.

Yeah, it could be worse. Some little old lady with an 800 square foot home and they put in some Monster 4 ton single stage unit.

The heat pumps are more forgiving but you still want to dial them in as best you can. It's already on the lowest of External Static Pressure settings.

Once I get the SPAN IO panel installed I'll have a better idea of what's going on but as best I can tell it's already short cycling and my insulation isn't great The plan was to you improve the insulation in the attic and add insulation in the walls where they're currently is none. Overall I think that would save me money but it would make the short cycling or efficiency of the heat pump worse.

I had like 6 different guys come out and only one of them recommended 18k BTU 1.5ton? system versus the 24k and almost everybody else was wanting to put in a 30k BTU system.

At least I didn't get a 2.5 ton two stage system.

 

[Coolhandz]

You guys think we'll get the software maybe in Q1 2026 now to enable Powerwalls+PowerShare?
Approaching ~2 years of waiting and delays.

I have no doubt it will be q1 at the latest.

Yeah, it could be worse. Some little old lady with an 800 square foot home and they put in some Monster 4 ton single stage unit.

The heat pumps are more forgiving but you still want to dial them in as best you can. It's already on the lowest of External Static Pressure settings.

Once I get the SPAN IO panel installed I'll have a better idea of what's going on but as best I can tell it's already short cycling and my insulation isn't great The plan was to you improve the insulation in the attic and add insulation in the walls where they're currently is none. Overall I think that would save me money but it would make the short cycling or efficiency of the heat pump worse.

I had like 6 different guys come out and only one of them recommended 18k BTU 1.5ton? system versus the 24k and almost everybody else was wanting to put in a 30k BTU system.

At least I didn't get a 2.5 ton two stage system.

I do HVAC and those units can be extremely tricky as they cram in so much control. I know you mention your external static pressure settings being set low. That would be for the air handler. You can also reduce the capacity of the condenser as well. Basically limit it to 85% of its' capacity or more. There will be dipswitches on the main control board of the unit that will do this. That unit should work for your space. If it's short cycling now, even with bad insulation, it is only going to get worse. Gotta dial the unit back some on the outside.

 

[Tanquen]

I have no doubt it will be q1 at the latest.


I do HVAC and those units can be extremely tricky as they cram in so much control. I know you mention your external static pressure settings being set low. That would be for the air handler. You can also reduce the capacity of the condenser as well. Basically limit it to 85% of its' capacity or more. There will be dipswitches on the main control board of the unit that will do this. That unit should work for your space. If it's short cycling now, even with bad insulation, it is only going to get worse. Gotta dial the unit back some on the outside.

OK, the technicians told me they set that appropriately whatever that means.
I'd love to see what the dipswitch setting options are and compare what mine is currently set to. You said 85% or more, what's the lowest it can go?

It's not a big deal that I could have saved a few hundred dollars on the 18K BTU unit but the fact that even with the available settings correctly configured, it's probably less efficient

 

[Coolhandz]

You guys think we'll get the software maybe in Q1 2026 now to enable Powerwalls+PowerShare?
Approaching ~2 years of waiting and delays.

I have no doubt it will be q1 at the latest. I choose to believe.

OK, the technicians told me they set that appropriately whatever that means.
I'd love to see what the dipswitch setting options are and compare what mine is currently set to. You said 85% or more, what's the lowest it can go?

It's not a big deal that I could have saved a few hundred dollars on the 18K BTU unit but the fact that even with the available settings correctly configured, it's probably less efficient

You could drop it down to 50%. The other static pressure setting looks like it drops it to 85 or 90.

 

[txtravwill]

I have no doubt it will be q1 at the latest.

I hope so. I was saying that back in 2024.

 

[Tanquen]

I have no doubt it will be q1 at the latest. I choose to believe.
You could drop it down to 50%. The other static pressure setting looks like it drops it to 85 or 90.

Looking at the information from the Powerwall it doesn't seem to be cycling too bad. I'm not sure if the idea would be that it would be drawing power 24/7?

There's been a few mornings where it's running almost the whole time from midnight to noon. But most days it cycles on for an hour off for an hour or two.

 

[Coolhandz]

Looking at the information from the Powerwall it doesn't seem to be cycling too bad. I'm not sure if the idea would be that it would be drawing power 24/7?

There's been a few mornings where it's running almost the whole time from midnight to noon. But most days it cycles on for an hour off for an hour or two.

Interesting mine looks like this:

We have winter Peak rates so mine looks like this every day to offset the increased electric pricing in the evenings.

 

[Tanquen]

Interesting mine looks like this:

We have winter Peak rates so mine looks like this every day to offset the increased electric pricing in the evenings.

What does it look like when you select the home on the far left icon? That should give you a better idea of when the HVAC is running.
My power wall is currently set up similarly and almost all of the solar. It goes to charging the battery during the day so that the house can draw from it from 3:00 p.m. to midnight when the utility rate is highest. I was just bummed out that there wasn't enough solar to charge the battery and cover what the house is using during the day as well.

 

[Coolhandz]

What does it look like when you select the home on the far left icon? That should give you a better idea of when the HVAC is running.
My power wall is currently set up similarly and almost all of the solar. It goes to charging the battery during the day so that the house can draw from it from 3:00 p.m. to midnight when the utility rate is highest. I was just bummed out that there wasn't enough solar to charge the battery and cover what the house is using during the day as well.

 

[Tanquen]

Do you think those peaks correspond to he AC is earning question?

Mind you and from what I've read it's not too bad And when it's the coldest mornings then running almost the whole time but on most days and afternoons it's running a little over an hour and then it's off for a little over an hour. I think that's pretty decent so I'm not sure an 18K BTU unit would have been better? I'm still if I were to do it today, I'd get the 18K and spend the three grand on extra insulation.

I still need to check and see if my 24K unit is set to the lowest 50% setting.

I already have the static pressure that's configurable in the thermostat to the lowest setting or most conducive setting when the unit is likely overpowered.

It looked like there was maybe another setting that had the ability to limit the cycles per hour? But again I think I'm OK there because I'm not cycling every five or 10 minutes In some cases it's an hour and a half or so but the compressor/inverter kicking on.

 

[Coolhandz]

Do you think those peaks correspond to he AC is earning question?

Mind you and from what I've read it's not too bad And when it's the coldest mornings then running almost the whole time but on most days and afternoons it's running a little over an hour and then it's off for a little over an hour. I think that's pretty decent so I'm not sure an 18K BTU unit would have been better? I'm still if I were to do it today, I'd get the 18K and spend the three grand on extra insulation.

I still need to check and see if my 24K unit is set to the lowest 50% setting.

I already have the static pressure that's configurable in the thermostat to the lowest setting or most conducive setting when the unit is likely overpowered.

It looked like there was maybe another setting that had the ability to limit the cycles per hour? But again I think I'm OK there because I'm not cycling every five or 10 minutes In some cases it's an hour and a half or so but the compressor/inverter kicking on.

Yeah. The peaks are the heat pump. I have it set 64 at night and then 67 when we wake up. Jumps to 69 when we get home at night and then back to 64 before bed. It's a 5 ton unit which I dialed back to 85% of it's capacity. I started an HVAC LLC and got the unit, a Carrier, myself. Here you can buy scratch and dent Carrier without a dealers license. Paid $5k for a $28k set-up with only minor dents. Knocked most of them out and they look brand new.

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