Reading the literature on CONNECT EPS Hybrid and AC it appears that this is not possible on my system
. I have three 9,5KW batteries and three AC Coupled inverters, plus solar. I have been advised that I could have a single or double socket installed close to the inverters,in the garage, but I really want to be able to keep at least some appliances running during a power cut and none are close enough to the batteries to be plugged in to sockets in the garage. Is there any way to schieve this ?
You’d have to partially rewire the house.
Each inverter would have to be connected to its own emergency power circuit board.
You can’t have three inverter EPS circuits outputting into the same house circuits, as the frequencies won’t be the same and things will probably go bang.
So one inverter’s EPS could be hooked up to a circuit board (let’s call that an EP board) that powers say the downstairs lights and sockets
Another inverter could have an EP board that is hooked up to the upstairs lights and sockets.
And the third inverter could go to a third EP board which does some of the other circuits.
Any high powered appliances like an oven or electric shower or car charger should remain on the original house circuit board - where the three inverters would also be connected for mains input (and output when the grid is present!)
Each EPS can’t go over 2.6kW if I recall correctly, so no high powered loads during a power cut. It’ll trip if it does and if it keeps happening it could damage the inverter.
You could have three “switches” that could allow you to run the 3x EP circuit boards direct from the house circuit board in normal operation and then if there was a power cut isolate any high powered appliances first then throw each switch to disconnect each EP board from the main board and switch over to the inverter’s EPS output.
Good answer @TX200 its very similar to the setup I have although I have two hybrid inverters each with their own battery.
The EPS output of the inverter with the 9.5 battery is connected to the (now) house fusebox.
The original house fusebox was split in two with the hot tub, our FIT solar panels and a couple of other circuits moved to a new non-EPS fusebox. The house fusebox now contains just ring mains for the lounge and bedrooms and lights.
Separately our kitchen with oven, washing machine, tumble dryer etc is in our extension which is on a completely separate fusebox. The ASHP is also on its own fusebox.
We had a power cut on Thursday in the high winds, the house, internet, lights all continued to work through the EPS but nothing in the kitchen. Had to move the kettle into the hallway to boil a cuppa.
Yes could have put another EPS fusebox in for the other inverter but there’s nothing left to power off it.