Recent content by superman22x

It should be able to handle it all, they sometimes struggle to get water above 120*F I think, I'd rather not have a preheat and final tank if possible. I suppose any resistance backup elements could be powered from the main panel instead of the sub panel too. Most cold climate heat pumps...

Awesome, that's good to hear! I think I will figure out how to fit the HPWH in one way or another then. My primary home heat pump is going to likely be an A2W, but I'm not sure if it will be able to do the job or not for hot water. I'm still ironing out the details there.

Ok, that's good to know! From a power perspective, two 6000xps is pretty similar to an 18k, slightly more operating losses I guess. That's why I'm torn between the options. The other problem is that a hpwh uses heat from the house in the winter, which will be fed by my primary heat pump...

They do, the room is too small for open air, but I may be able to duct it somewhere that it is fine.

Yes, HPWH may be in the picture. My mechanical room is small, so I'm not tying myself to that just yet, but it would be ideal. HPWH needs a decent bit of air space.

Hello all, I'm looking for some tidbits of advice. We are constructing a house this year, and it is intended to be nearly passive. I'm not going through the expense of certifying, etc. But I based my targets for insulation, air sealing, windows on the PassiveHaus energy consumption goals. So...

Ok, I'll keep that in mind! It's not a ton more once you are at the 12k. Other than the 5k, no SolArks are cheap. That's why I wasn't sure if I was down the right path in the first place. The 200A pass through seems ideal as well.

Hello, I'm looking for some opinions and advice. We are planning a new construction in a year or so. Our intent is for a low load home, nearly Passive. With that, I took Hearing Degree Days and was able to estimate what size array I'd like. I used a sun estimator to get an idea of what I can...

Ah, that's interesting. I knew higher voltage was used elsewhere in the world, but didn't realize 3 phase was common place for residential.

Ah ok, three phase grid availability is definitely rare but nice to have!

Oh nice, that's a great setup. Do you run a single VFD for all the equipment?

This is a good idea, and an excellent point about a one man shop. A single larger VFD might be a bit pricey up front, but not awful, especially if it's designed for 3 phase in/out. They get pricey when you have to derate them by 50% for single phase in/3phase out.

This is more to allow for futue expansion. I don't have the machines, but would like to have single source of 3 phase so I dont need to get a VFD for every machine.

Yes, that's true, some of the stuff would have pretty high starting loads. Other than the CNC, I don't see putting anything larger than about 3-4kw in. The CNC would have a ramped start. So maybe with 15kw of inverters, I would be ok.

I am planning a solar install for a new build (couple years out at this point...) and I wasn't sure if someone had some feedback on 3 phase. I have a couple tools in my shop now that run 3 phase through VFDs. But in the future, I'd like to be able to easily add a few more, including a ~15hp CNC...