Chapter 12. Battery charger module
12.2. Possible operation scenarios
The inverter equipped with the battery charging module can work in one of the following scenarios (or their
combinations) previously programmed at the manufacturer's:
1. The "on-grid bat" system
The inverter is connected to the mains. Charging the connected battery is a priority. Energy electric
power is transferred first from the Renewable Energy Sources (RES) to the connected batteries.
Transmission of energy to the grid begins only when the power from RES is greater than what can be
recharged or when the batteries are fully recharged.
This mode of operation is recommended for consumers who want to use energy accumulated in batteries.
2. The "on-grid" system with the "Energy guard" module
The system synchronizes with the electrical grid, but manages the energy in such a way as to avoid its
transmission further than the connection point to the electrical grid. The system is intended for customers
who do not plan to sell electricity to the mains, but only use it for their own needs.
Renewable
sources of
electricity
Inverter
PS100
Rechargeable
battery
Electrical
load
Grid connection
point
ps100-10-3-en
Module
„Energy guard”
Fig. 12.2. Energy transfer scenarion with „on-grid” operation with „Energy guard” module
Operation principle: inverter based on data received from the Energy guard module about the power demand
through electrical loads, controls the flow of energy as follows:
• Electricity obtained from renewable energy supplies electrical loads and excess energy is
stored in batteries - a solid green line.
• When the demand for electricity exceeds the renewable energy source's capacity, the
shortage is balanced by the use of energy stored in the battery - the blue dotted line.
• When the demand for electrical power exceeds the capacity of the renewable energy source
and energy supplied from the battery, the power shortage is taken from the electricity grid - a
red dotted line.
3. The "off-grid" system
The inverter supplies the local loads and collects the surplus energy in batteries (solid green line). If
the power from renewable sources is not enough to cover the demand of loads, the batteries will be
discharged (blue dotted line).
Renewable
sources of
electricity
Inverter
PS100
Rechargeable
battery
Electrical
load
ps100-11-2-en
Fig. 12.3. Energy flow in „off-grid” system
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