Introduction
13
3.3 Work Mode
■ Self consumption mode
There are a six work modes of the inverter based on dierent needs. Please
note that SUB mode, SBU mode and MKS mode can only work under Paki-
stani Safety.
Self con-
sumption
mode
The charging and discharging strategy of EMS battery:
This mode is suitable for the time when the electricity price is high and the
internet is not allowed. This mode requires the installation of an electric
meter.
1. The battery is in a state of real-time charging and discharging. The charg-
ing and discharging power of battery depends on PV power, load power and
rated power of inverter. The goal is to always try to control the power of the
electric meter to 0, that is, to make the output power of the inverter equal to
the load power (or to control it to the set minimum power to take electricity
from the power grid).
2. Electricity meter data is needed in this state. Zero-export is forced to be
enabled, and it is not allowed to feed power into the power grid;
3. In this state, it is necessary to set the battery reserve SOC (if the battery
is set to this SOC, it will stop discharging, and this SOC value can be set).
4. If the battery power is lower than the minimum SOC value (which can be
set), the battery is forced to be charged to the reserved SOC.
Notes:
PV power is superior to power supply to the load, and the battery can be
charged and discharged, but it can only be charged from PV.
1. When load power > inverter rated power:
The PV power < inverter rated power, and the battery discharge power
value = PV power-inverter rated power;
*PV power > inverter rated power, battery charging power value = PV pow-
er-inverter rated power;
2. When the load power is less than the inverter rated power:
*PV power < load power, battery discharge power value = PV power-load
power;
*PV power > load power, battery charging power value = PV power-load
power;
* This state of zero-expor is forced to be enabled. When the PV power
> [battery charging power value+load power] the remaining power is not
allowed to be fed into the power grid, and PV limits the power so that PV
power = [battery charging power value+load power].
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