Page 43
Apollo GEM Unit Modes
The normal mode setting for a single Apollo GEM installation is “Single Unit”
It is possible however to operate more than one Apollo GEM controller on the same supply and
generation system.
If two Apollo GEM controllers were used this would give a total output capability of 7.2KW into two 3KW
loads which could be in different locations and would be applicable to micro generation systems sized
between 4KW and 10KW.
The Apollo GEM is configured to operate in one of the following modes:
SINGLE UNIT
Setting for normal single Apollo GEM controller system. (default)
PRIMARY UNIT
Sets the controller as the primary unit in a two controller system. When
surplus PV power is available the primary unit will take priority over the
secondary unit. Surplus PV power will be available to the secondary unit if the
primary load reaches maximum power without consuming all of the available
surplus PV power or if the set temperature of the heat store is reached.
SECONDARY UNIT
Sets the controller as the secondary unit in a two controller system. The
secondary unit is able to use surplus PV power when the primary unit is
already at maximum power output or no longer requires power due to the
primary heat store being up to temperature.
LOAD SHARE
In this mode both Apollo GEM controllers in the system will share any available surplus PV
power between them. In the event that one of the controllers reaches its
maximum output power or the set temperature of the heat store is reached
then all further available PV surplus power is diverted to the other unit.
Apollo GEM
Installation & User Manual
Apollo GEM
Installation & User Manual
Apollo GEM
Installation & User Manual
Apollo GEM
Installation Manual