FoxESS Community - Owners & Installers Forum

Hi there,

I’m based in Sydney (single-phase) and about to go ahead with the following battery-only solar setup. Just wanted to sanity-check a few things before final sign-off with the installer:

System Specs:

2 × FoxESS H1-5.0-E G2 (in parallel)

2 × EQ4800-L6 stacks (12 batteries total – 55.92kWh / ~50.3kWh usable)

I'm going with 2 stacks of 6 to get as close as possible to the 50kWh usable cap for the Australian Federal battery rebate.

Questions:

1. With the 2 H1 inverters in parallel, does this give me 10kW charge/discharge on single phase?

2. Does the 10kW also apply to the EPS (backup) if the grid goes down?

3. Do I need a DTSU666-H energy meter to control export limiting (e.g. prevent export during negative FiT periods)?

4. How many CT clamps are needed in this setup, and where would they typically be installed?

Appreciate any insights, especially from anyone who’s run a similar setup.

Thanks in advance!

Hi and welcome,

1. With the 2 H1 inverters in parallel, does this give me 10kW charge/discharge on single phase?
Yes, the inverter's input and output are multiplied by the inverter number so 2 X 5kW will be 10kW inversion.

2. Does the 10kW also apply to the EPS (backup) if the grid goes down?
Check the datasheet as EPS loads are normally amp limited lower than the ac port but same as above applies, the EPS is connected in parallel and your output is doubled with two inverters.

3. Do I need a DTSU666-H energy meter to control export limiting (e.g. prevent export during negative FiT periods)?
Normally, you only need a single CT clamp from the master inverter clipped around your incoming grid supply. No meter required but meters are supported.

4. How many CT clamps are needed in this setup, and where would they typically be installed?
Just one CT from the master, the slave reads the ct data via the canbus network between the inverters.

Check out my video on parallel systems.

Hi Will,

Really appreciate your quick response!

Cheers,

Sorry, I forgot to add, this will be connected to an existing Solar PV setup. Does that change the answers for the below?

3. Do I need a DTSU666-H energy meter to control export limiting (e.g. prevent export during negative FiT periods)?

4. How many CT clamps are needed in this setup, and where would they typically be installed?

3. Do I need a DTSU666-H energy meter to control export limiting (e.g. prevent export during negative FiT periods)?
The DTSU666 is a 3 phase meter and so unless the existing FiT system is 3 phase you won’t need one of those.

4. How many CT clamps are needed in this setup, and where would they typically be installed?
Assuming single phase throughout, you would need a second CT clamp connected from the master inverter to the live feed of your FiT generation source so that it can account for any generation and manage the export limit.