Joe Gleason
New Member
I'm installing an 18kpv with a rack of six EG4 batteries. My house power comes to a meter and that feeds straight into my Main Load Center with a 150A breaker. It is a Siemens load center, bus bar rated at 225A. I plan on using a 70A breaker in the bottom left side of the main panel going to the Grid input on the 18kpv. I will have a critical loads subpanel. In case of any issues I want to be able to feed the critical loads panel from either the inverter or switch it to grid (a second 70A breaker), disconnecting the inverter from the critical loads panel.
We use an average of 15KWH per day. My biggest loads are the wall oven (rarely used) and the well pump. I have been monitoring usage for several months with an Emporia system. Peak use is around 8,500 watts which only happens if the oven is on and the well pump kicks on at the same time. Propane for heat (hydronic radiant floor heat), hot water, cooktop, and dryer. I also have an EG4 24,000btu solar/hybrid minisplit. We live in New Hampshire so air conditioning usage is fairly minimal.
I would appreciate some feedback on whether my wiring diagram will work. The manual transfer switch would normally be in the down position feeding the Load output of the inverter to the critical loads subpanel.
![2024-05-23 10_02_21-CorelDRAW X7 (64-Bit) - C__Users_joegl_OneDrive_Files_CorelFiles_Solar-Inv...png 2024-05-23 10_02_21-CorelDRAW X7 (64-Bit) - C__Users_joegl_OneDrive_Files_CorelFiles_Solar-Inv...png](https://diysolarforum.com/data/attachments/217/217167-cdca2336fccb3e8ef8951f329f587445.jpg)
We use an average of 15KWH per day. My biggest loads are the wall oven (rarely used) and the well pump. I have been monitoring usage for several months with an Emporia system. Peak use is around 8,500 watts which only happens if the oven is on and the well pump kicks on at the same time. Propane for heat (hydronic radiant floor heat), hot water, cooktop, and dryer. I also have an EG4 24,000btu solar/hybrid minisplit. We live in New Hampshire so air conditioning usage is fairly minimal.
I would appreciate some feedback on whether my wiring diagram will work. The manual transfer switch would normally be in the down position feeding the Load output of the inverter to the critical loads subpanel.
![2024-05-23 10_02_21-CorelDRAW X7 (64-Bit) - C__Users_joegl_OneDrive_Files_CorelFiles_Solar-Inv...png 2024-05-23 10_02_21-CorelDRAW X7 (64-Bit) - C__Users_joegl_OneDrive_Files_CorelFiles_Solar-Inv...png](https://diysolarforum.com/data/attachments/217/217167-cdca2336fccb3e8ef8951f329f587445.jpg)