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Apollo GEM Output Modes
The Apollo GEM controller has two separate outputs. Each output is capable of driving a load up to 3KW.
Each output can work in variable power mode (typically for heating loads) or in a threshold driven full
power mode, typically used for non heating appliances.
The "Output" parameter described below in installer menu screen 1 sets which outputs will be used and
the priority order. Configuration of the outputs themselves is carried out from the respective output
configuration menus (installer menu screens 2 and 3).
Output mode settings
ONLY O/P 1 Only output 1 is active during PV power optimising.
ONLY O/P 2 Only output 2 is active during PV power optimising.
1 THEN 2 Output 1 is used for PV power optimising until the set temperature is
(Priority Mode) reached and then output 2 is used. If the temperature of the heat store
connected to output 1 falls below the set temperature, the system reverts to
using output 1 for optimising until the set temperature is reached again.
2 THEN 1 Output 2 is used for PV power optimising until the set temperature is
(Priority Mode) reached and then output 1 is used. If the temperature of the heat store
connected to output 2 falls below the set temperature, the system reverts to
using output 2 for optimizing until the set temperature is reached again.
1 AND 2 This mode will share the diverted surplus PV power during PV power
(Power Share Mode) optimisation equally between both heat stores connected to outputs 1 and 2.
If the set temperature of either heat store is reached then all available
surplus PV power is sent to the other heat store.
1 (6/9/12KW) For larger applications such as swimming pool heating or hot water
accumulator tanks the Apollo GEM system can also optionally operate
together with up to 2 external contactors to give a total output capability of
6, 9 or 12KW. (16KW for threshold mode)
Apollo GEM Installation Manual
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