Setting
Description
Question
Result
Action
Solar Only – Default
(Solid LED)
Solar PV is the only
energy source available
to divert to hot water.
If thermostat cut-off is
not reached from solar,
then off-peak will be
used to finish the
process that night, or at
11pm if there is no off-
peak.
Has the hot water tank
reached thermostat cut-
off from Solar?
Yes.
No.
Mains (off-peak or
ortherwise), is NOT
called on.
Mains (off-peak or
otherwise) used to
boost the tank to the
tank to thermostat cut-
off.
Solar Only – Selected
Twice
(Flashing LED)
The unit is now in
absolute Solar Only
mode. The only energy
source available is
surplus solar PV.
Has the hot water tank
reached thermostat cut-
off from Solar?
Yes.
No.
No mains boost (off-
peak or ortherwise), is
called on.
No mains boost (off-
peak or ortherwise), is
called on.
Boost 2.5Hrs
Diverters surplus solar
PLUS draws from Off-
Peak/Controlled Load to
Boost.
Has the HW reached
cut-off?
Yes, before midday.
Reduce boost time by
12.5% of 2.5hrs
(this process continues
until there is no
overnight boost).
“
Has the HW reached
cut-off?
Yes, after midday.
No further reduction in
boost time.
“
Has the HW reached
cut-off?
No
Boost to cut-off from
mains when off-peak
becomes available or at
11pm.
Boost 2.5Hrs (Fixed)
(Alternative)
Press this button again
to toggle and fix the
boost amount to 2.5Hrs
No change in condition.
CATCH will boost for
2.5Hrs, or until
thermostat cut-off is
reached, at 11pm or
when the off-peak is
present.
As described.
Green CATCH Firmware Steps
Catch Power GREEN – Installation manual - Page 7
