diy solar

diy solar

Adding Schneider XW Pro

Rennit said:
I have heard good things about the Rheem hybrids from word of mouth.
Click to expand...
Yes, this is the one I am considering:
www.homedepot.com

Rheem Performance Platinum 50 Gal. 10-Year Hybrid High Efficiency Tank Electric Heat Pump Water Heater XE50T10H45U0 - The Home Depot

The Rheem ProTerra Electric Hybrid Electric Heat Pump Water Heater. Heat pump technology makes it 4X THE EFFICIENCY of a conventional electric model (of the same or similar capacity). More efficiency means more energy savings. It's so efficient, it can pay for itself in energy cost savings...
www.homedepot.com
 
I believe the dual Tigo boxes put both panels on series and the specs are per input. If that is the case, I believe a single 500 watt dual input will work with 2 of these 480 watt panels.
 
pvdude said:
Yes, this is the one I am considering:
www.homedepot.com

Rheem Performance Platinum 50 Gal. 10-Year Hybrid High Efficiency Tank Electric Heat Pump Water Heater XE50T10H45U0 - The Home Depot

The Rheem ProTerra Electric Hybrid Electric Heat Pump Water Heater. Heat pump technology makes it 4X THE EFFICIENCY of a conventional electric model (of the same or similar capacity). More efficiency means more energy savings. It's so efficient, it can pay for itself in energy cost savings...
www.homedepot.com
Click to expand...
Yes - we have one of these Rheem Hybrid heaters and it works great. You need to think about ducting, meaning where you are getting inlet and outlet air as they need to be separated to avoid short circuiting inlet and outlet air, either that or have it installed in an open space. Ours is in a small utility room with inlet brought in from the next room (a bedroom). I lined the 8" metal duct with 1/4" open cell foam to reduce noise transmission so it's acceptable at night. The outlet air blows a cold draft, but that's into the utility room next to our heat pump's air handler inlet so doesn't really matter. The Rheen touch screen on the tank is really handy, shows T and allows instant setting of vacation mode. I think they may have removed touch screen and gone just to app control, but that works pretty well too. Another significant benefit is that the Rheem h/w heat pump removes humidity from the air in our basement which is pretty damp to start with (typical here in the Pacific Northwest), interesting to see the amount of condensation that flows out by gravity through the drain pipe out the wall to the outdoors.
 
A heat pump water heater is on my project list. The current gas water heater is 7 year water heater in year 6. It's probably on it's last legs.

I'd love the free cooling of the garage, take the edge off the summer heat.
 
I was planning to buy the Rheem from Home depot (10% Veteran discount!)
But then I became aware of this thing, and alte sells them!

Stiebel Eltron Heat Pump Water Heaters

FREE Shipping! Stiebel Eltron Accelera 220E heat pump water heater works like an air conditioner but instead of dumping the heat outdoors, it puts it into the water. Up to 80% more efficient!
www.altestore.com www.altestore.com

I have learned to fear any technology designed by Germans.
All the German cars, motorcycles, cameras, technology, etc. I have owned was FAR more complicated than it needed to be.

My FIL was a German Chemical Engineer, congenitally and pathologically unable to design and build anything simple.
We did many projects together around the house, over the years.
Took all day to frame & trim a door in our house, for instance.
It is an elaborate thing of beauty, but it's still just a door.

Anyway, masochist that I am, might try a Stiebel Eltron Accelera
Heat Pump Water Heater
 
I've been looking at HP water heaters on and off for a while. What stands out to me is they don't charge 30% more just because the tank is larger but all the components are the same...

Also, the full electric element is 1500 watts, much smaller than the element in the Rheem.
 
pvdude said:
Anyway, masochist that I am, might try a Stiebel Eltron Accelera
Heat Pump Water Heater
Click to expand...
FWIW, I had a Stiebel Eltron tankless heater that developed* a leak. and I was amazed that I could actually get a $5 replacement part that I needed to fix it (during the pandemic). Beyond that little issue it was great and I really liked it. It served me well for 10 years until I sold the condo. Here most of the tankless water heaters have a 5-7 year life due to the water.

* I had a shitty glorified handyman pull out and reinstall all the cabinets due to a termite issue in the condo so they could be fumigated. The water heater was mounted to the cabinets so it was removed and reinstalled, and I am sure it was damaged in that process.
 
When I get to the heat pump water heater I'd like to have external control via modbus, MQTT, or something similar. It looks like the Stiebel Eltron doesn't have WiFi. The Rheem/Ruud has some traffic about how they changed the API a couple years ago and broke 3rd party control.
But maybe I'm overthinking it and I should just set the schedule and move on.
The heat pump water heater is a little further down the road.

For now, I heard back from the city! They had a couple minor revisions (I didn't label the fire setbacks and missed one wire gauge)
That's encouraging, I hope to have final answers soon. Probably early next week.
 
400bird said:
I'd like to have external control via modbus, MQTT, or something similar. It looks like the Stiebel Eltron doesn't have WiFi.
Click to expand...
Looks like all you get is a contact closure that can switch you to a temperature setback. Not ideal, but what exactly would you want to control?
 
I'm thinking something like load limiting/load shed. Where maybe I don't want the water heater running if the AC and oven are already going. Also, OhmConnect pays me not to use energy at random (but with day ahead notice) times. I'd like to turn off off for those time events.

I haven't quite figured it it the details. But I'd rather have the option than not.

I'll check out the temperature setback options in the manual.
 
I made and submitted my permit revisions overnight.
Upon review this morning, the city asked for more. We sent stuff back and forth through a few emails. I ended up redoing things I'd already done and resending PDFs they already had. But by noon the city was happy and the permit was accepted back for review and to get stamped?

I should hear back mid-next week.


Holy typos Batman! That was bad, I fixed all the odd autocorrected gibberish and added a bit of clarity.
 
Last edited:
400bird said:
I made and submitted my permit revisions overnight.
Upon review this morning, the city asked for more. We sent stuff back and forth through a few emails. I ended up redoing things I'd already done and resending PDFs they already had. But by noon the city was happy and the permit was accepted back for review and to get stamped?

I should hear back mid-next week.


Holy typos Batman! That was bad, I fixed all the odd autocorrected gibberish and added a bit of clarity.
Click to expand...
What is your final RSD solution with XW?
 
400bird said:
The XW can stay running, no need for a rapid shut down.

For the DC coupled roof PV, I went with a stand alone Tigo system. Both the transmitter and boxes on the PV modules.
Click to expand...
From your research can the Schneider RSD solution that works with Tigo also shutdown the inverter via remote switch?
 
ChrisG said:
From your research can the Schneider RSD solution that works with Tigo also shutdown the inverter via remote switch?
Click to expand...
I don't think it can, but that's not something I directly searched for. You might want to go through the manuals to see if you can find those details. I believe the RSD status is communicated on the Xanbus network.

But I don't think shutting down the battery inverter is the purpose of rapid shut down. It is about firefighter safety and limiting higher DC/PV voltage they might encounter when fighting a fire.
 
RSD referred to DC/PV, of course.
Does fireman also want to shut off grid AC to the house before using a fire axe and water inside?
If so, wouldn't he want to shut off inverter (or disconnect it from house wiring)?
 
Hedges said:
Does fireman also want to shut off grid AC to the house before using a fire axe and water inside?
Click to expand...
I don't think it's standard practice to shut off AC power just to hose down a house. I doubt they are concerned about the water getting a shock.
And 240vac running over the lawn, driveway, parking lot, etc is already at ground potential ?

My XW is in the garage with no way to shut it or the house power down from outside. You can turn off the PV and main breaker, but the lights are staying on.

I take it back, the battery DC disconnect is outside and labeled on the system map thing on the main panel, so I suppose a firefighter could power down the house. But my interpretation of the code is that the DC disconnect was required for maintenance operations, not firefighter safety.
 
400bird said:
I take it back, the battery DC disconnect is outside and labeled on the system map thing on the main panel, so I suppose a firefighter could power down the house. But my interpretation of the code is that the DC disconnect was required for maintenance operations, not firefighter safety.
Click to expand...
Agree with your interpretation. The NEC doesn't have any requirements to be able to completely power down a service for firefighter safety. (Other code organizations do though.)
 
The XW-Pro does have a terminal on the AUX port for "Remote Power Off" RPO. You need to enable RPO in the settings, then any switch or relay can connect pins 2 and 3 of the AUX connector and it will shut down the inverter. Opening the contact will not power it back up. You need to reenable the inverter to start it again.
 
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