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Allow at least 30cm of clearance around the inverter for air flow. Make sure that the air can circulate freely
around the unit.
Variable speed fan operation is required in inverter and charge mode. This is to be implemented in such a
way as to ensure high reliability and safe unit and component operating temperatures in an operating
ambient temperature up to 50°C.
Speed to be controlled in a smooth manner as a function of internal temperature and/or current.
Fan should not start/stop suddenly.
Fan should run at minimum speed needed to cool unit.
Fan noise level target <60db at a distance of 1m.
2.5.11 DIP Switches
On the front panel of inverter, there are 5 DIP switches which enable users to customize the performance of
the device.
Table 2.5.11 TPH Series Dip Switch Function Setting
DIP Switch NO.
Switch Function
Position: 0
Position: 1
SW1
Low Battery Trip Volt
10.0Vdc
For Deep-Cycle Battery
10.5Vdc
For Starting Battery
*2 for 24Vdc, *4 for 48Vdc
SW2
AC Input Range / (AVR)
AC Source
For Utility Mode
For Generator Mode
230Vac HV
184-253Vac / (176-276Vac)
140-270Vac / (150-276Vac)
120Vac LV
100-135Vac / (92-144Vac)
90-135Vac / (78-144Vac)
SW3
Power Saver Auto Setting
Night Charger Function
Detect Load Per 3Secs
SW4
O/P Frequency Setting
50Hz
60Hz
SW5
Solar/AC Priority Setting
Utility Priority
Battery Priority
SW1: Low Battery Trip Volt:
For 12VDC model, the Low Battery Trip Volt is set at 10.0Vdc by typical deep cycle lead acid battery. It
can be customized to 10.5Vdc using SW1 for sealed car battery, this is to prevent batteries from
over-discharging while there is only a small load applied on the inverter.(*2 for 24VDC, *4 for 48VDC)
SW2: AC Input Range:
There are different acceptable AC input ranges for different kinds of loads.
For some relatively sensitive electronic devices, a narrow input range of 184-253VAC (100-135V for
120VAC model) is required to protect them.
While for some resistive loads which work in a wide voltage range, the input AC range can be customized to
140-270VAC (90-135V for 120VAC model), this helps to power loads with the most AC input power
without frequent switches to the battery bank.
In order to make the inverter accept dirty power from a generator, when the SW2 is switched to position“1” ,
the inverter will bypass an AC input with a wide voltage and frequency(40Hz-70Hz for 50Hz/60Hz).
Accordingly, the AC charger will also work in a wide voltage and frequency range (43Hz-67Hz for
I > 50%
I ≤ 40%
100%
LOAD%
(INV MODE)
Load < 30%
Load ≥ 30%
Off
30% ≤ Load < 50%
Load ≤ 20% / Load ≥ 50%
50%
Load ≥ 50%
Load ≤ 40%
100%
