FoxESS Community - Owners & Installers Forum

Hi all.

In the interests of trying to help, I thought someone may find the attached helpful with their thinking for where CTs/Energy-Meters might be placed in the chain.

I'm not an expert! Always seek advice from a competent person.

My setup includes:

• FoxESS H1 (6kW)

• 12kWh (ECS4100)

• AC Connection supplying main house loads

• Backup connection supplying "critical" loads (Lights and LOW POWER devices including IT equipment)

• Myenergi (Eddi & Harvi): Using CT clamps

• Eastron SDM 120/230 Energy Meters (in-line DIN)

• Waveshare 485 devices

• Home Assistant

Notes:

• I have a local earth rod working with grid earth

• All the above is in a duplex metal enclosure but segregated for AC/Backup isolation (keeps it all in one tidy space)

• EPS on the H1 is set for UPS, with internal switching (no external load switching as I'm only doing discrete circuits - not whole house backup)

• The "Main EM" is dedicated for the H1, and is connected to the "Meter" inputs on the H1. It replaces the need for a CT clamp and is "instant" readings for the H1.

• I use the other Eastrons just because I'm curious and the readings are sent to Home Assistant.

I created this to work through where best to place an RCBO for an EV that I may (or may not get) in the future. I think I've got it.

Hope this proves helpful to others.

If there are any glaring faults, I'd also welcome any constructive feedback .

Thanks.