Hybrid inverter and battery adding to existing OFF-GRID system.

[ssearch]

Hello!
We have installed T10-G3 inverter and 12.6 kW panels.
WE planning to add some panel, but main question is about adding
H3-PRO-15 and two EP5 to existing system.

We must limit power to GRID max 11.1 kW

1. Must we use one CT meter connected to H3-PRO-15 and T10 will be operated as slave?
2. Can this system work with additional load. To switch some heater then panels have some extra power?
3. Can this system operate wit NORD POOL price controller? To understand when it is better to send power to GRID, to charge battery or to switch additional LOAD?

[Will]

Answers in bold

1. Must we use one CT meter connected to H3-PRO-15 and T10 will be operated as slave?
I believe with a string inverter and a H3 inverter will need a meter for each, you can't chain them together currently
2. Can this system work with additional load. To switch some heater then panels have some extra power?
That would need some external automation or smart device with it's own ct's. EV's are normally a great place to push surplus power to in an automated way or even a hot water tank with a solar diverter
3. Can this system operate wit NORD POOL price controller? To understand when it is better to send power to GRID, to charge battery or to switch additional LOAD?
I have not heard of Nord Pool but the inverter supports a bunch of standards. Hopefully another user can confirm if they've got it working.