
3.Input voltage
The power inverter will operate from input 
voltage range 10V-16V (12V spec.) or 20V-32V
(2
4V spec.) or 40V-61V (48V spec.).
3. Grounding
The power inverter has a lug on the rear 
panel chassis ground. This is to connect 
the chassis of the power inverter to the 
ground. The ground terminals in the AC 
outlets on the front panel of the inverter 
are also connected to the ground lug.The 
chassis ground lug must be connected 
to a grounding point, which will vary 
depending on where the power inverter is 
installed. In a vehicle, connect the chassis 
Troubleshooting
Television interference : 
Operation of the power inverter can interfere
with television reception on some channels.
If this situation occurs, the following steps
may help to alleviate the problem.
-Make sure that the chassis ground lug
on the back of the power inverter is solidly
connected to the ground system of your
vehicle, boat or home.
-Do not operate high power loads with 
the power inverter while watching 
television.
-Make sure that the antenna feeding 
your television provides an adequate
(snow free) signal and that you are using
good quality cable between the antenna
and the television.
-Move the television as far away from 
the power inverter as possible.
-Keep the cables between the battery 
and the power inverter as short as possible
and twist them together with about 2 to 3
twists per foot. This minimizes radiated
interference from the cables.
Maintenance
You should clean the exterior of the unit
periodically with a dry cloth to prevent
accumulation of dust and dirt. 
At the same time, tighten the screws on
the DC input terminals.
have to deliver the starting currents for all 
the loads at once.
Controls and indicators
The ON/OFF switch turns the control 
circuit in the power inverter on and off. It 
does not disconnect power from the power
inverter.
Operating limits
1.Overload / Auto re-start
The inverter would operate most AC loads
within its power rating. If the load is over
the specification, HT-S-1800 will auto re-
start first, if not success, the inverter
will shut down automatically.
2.Overtemp
The buzz will be noisy if the temperature is 
too high, then the inverter will be shut down 
automatically. Please re-set it after the 
inverter got cooling.
Approx. Amps 
Req'd Wire Guage
Max Watts Out
15A #16150W 
30A #12300W 
60A600W 
100A #4
#4
#4
6 X #4
2 X #4
2 X #4
1000W 
120A1200W 
150A
#6 or 2×#10
1500W 
1800W 
2500W 
3000W 
180A
250A
300A
1. Where to install
The power inverter should be installed in a
location that meets the following requirements:
 a. 
Dry - Do not allow water to drip or splash
 on the inverter.
 b. 
Cool - Ambient air temperature should 
 
be between -15°C and +45°C, the cooler
 
the
 
better.
 c. V
entilated - Allow at least one inch of 
 
clearance around the inverter for airflow. 
 
Ensure the ventilation openings on the
 
 
rear and bottom of the unit are not 
 obstructed.
 d. 
Safe - Do not install the inverter in the 
 
same compartment as batteries or in any 
 
compartment capable of storing flammable
 liquids such as gasoline.
2. Cables
DC to AC inverters require high amperage/low
voltage DC power to low amperage/high
voltage AC power. To operate properly
connect inverter DC input terminals direct
to battery with heaviest wire available see
chart below:
Installation
position, the inverter should supply
 
power to the load. 
ground to the chassis of the vehicle.
In a boat, connect to the boat’s grounding 
systems. In a fixed location, connect the 
chassis ground lug to earth.
 Warning!
 
Do not operate the power inverter
 without connecting it to ground.
 
Electrical shock hazard may result.
Operation
To operate the power inverter, turn it on 
using the ON/OFF switch on the front 
panel. The power inverter is now ready to 
deliver AC power to your loads. If you are 
operating several loads from the power 
inverter, turn them on separately after the
 
inverter has been turned on. This will 
ensure that the power inverter does not
If the voltage drops too low(※1) or raise too
high(※2), the inverter will shut down automatically.
Before shut down, buzz noise will warn you.
※1:
<10.0V (12V spec.) or <20V (24V spec.)
 or <40V (48V spec.)
※2:
>16V (12V spec.) or >32V (24V spec)
 
or >61V (48V spec.)
fault LED Indicator
Remote control-LCD
ON/OFF switch
ON/OFF
Fault
Waveform
Power saving 
function 
Battery volt
Load watts
Battery capacity
High battery 
volt protection. Low battery 
volt protection. Overload
Over temperature