AC•THOR
®
/ AC•THOR
®
9s Operating instructions, version a0020806
17
The following applies to external control via "Modbus TCP", "http" or "SMA Home Manager"
(not "SMA Direct Meter Communication"): An
AC•THOR
without an available load at the
controllable output cannot be externally controlled in M3 operating mode. Since the load at the
relay is not controllable, an unstable control behavior would be expected! This also applies if a
my-PV Meter is used for power measurement at the switched load!
Multiple units (multi-mode): A slave without an available load at the controllable output cannot
be controlled in the M3 operating mode in multi-mode. Since the load at the relay is not
controllable, an unstable control behavior would be expected!
This also applies if a my-PV Meter is used for power measurement at the switched load!
The following applies to frequency control: This operating mode is not suitable for off-grid
systems. my-PV recommends using several
AC•THOR
s instead to increase the control range!
Optionally, the AC•THOR can also take over boost backup of the hot water temperature
with both
immersion heating elements.
The my-PV temperature sensor must in any event be installed in the hot water tank above the
upper heater to provide a reliable reading!
Data my-PV
temperature sensor
Current power output
Homescreen
Relay state
Single-Boost
Starts a once-only boost
backup mode
(button only appears if boost
backup is activated)
The power display is automatically scaled by the additional power.
If a my-PV Meter is used for power measurement at the switched load, then the consumption is also
shown in the power display and taken into account in the energy recording of the data logger.
The configuration is done in the web interface. See chapter "Special setting options in the web
interface".
Scaling of the power display:
•
With the
AC•THOR
to 3,000 watts + power measurement at the relay
•
With
AC•THOR
9s to 3,000 watts + power measurement at the relay / 3
A three-phase load is assumed at the relay (see wiring diagram).
Example
AC•THOR
9s:
The power of the switched load was measured at 6,000 watts, the relay is switched. The
three 3kW bars are each extended by 2kW (6kW/3).
