superman22x
New Member
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 for those that aren't familiar, the house will have a very low heating/cooling load. In the region of 1 ton at design temp, or 12kbtu. With that said, I intend to have solar at this house (Michigan) that will cover me for most of the year except the worst of winter when we see the sun once a month. We will still be grid tied, but I would like to have most of the house covered by backup power. I do not need a grid interactive inverter however, as my utility has made that basically useless. So I'm stuck at choosing a path for the inverter... Initially I was thinking an EG4 18k, the 200A pass through would be easy to setup and have the whole house backed up. But it really might be quite a bit more power than we need except on occasion. Two EG4 6000xp's seems like it would be more than enough power for half the cost. But a subpanel would be required. Maybe not going EG4 at all. It seems their latest inverters are a good leap ahead though.
We will have a heat pump with max current draw of 3000watts
Heat pump Dryer
Well Pump - shallow, only 40ft to water
Electric water heater 4500watt
Induction Stove
Electric Oven
Those are the big ticket items I can think of.
For the most part, one 6000xp could cover everything. The water heater and stove/oven have some pretty large power draws though. So either they would have to be on the not backed up panel or possibly two 6000xps feeding a 100amp panel would be sufficient.
Appreciate any input! Thanks
We will have a heat pump with max current draw of 3000watts
Heat pump Dryer
Well Pump - shallow, only 40ft to water
Electric water heater 4500watt
Induction Stove
Electric Oven
Those are the big ticket items I can think of.
For the most part, one 6000xp could cover everything. The water heater and stove/oven have some pretty large power draws though. So either they would have to be on the not backed up panel or possibly two 6000xps feeding a 100amp panel would be sufficient.
Appreciate any input! Thanks