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Understanding the LED indicators

 ‘Power’ indicator:         Indicator turn on indicate unit is ON.
 ‘Fault’ indicator:         Indicator turns on indicate fault was detected. Unit has shutdown. To reset unit, 
                                     

 

remove the fault condition and reset unit by using the toggle switch and turn 

                                    

  

unit off and on again. 

Understanding the fan operation

 

The fan on the unit will automatically turns on when it sense the internal temperature of the unit reach 
to its preset level.

AC Load on Power Inverter

Although the Power Inverter can provide high surge power up to two times the rated output power, 
some appliances may still trigger on the inverter protection system. A higher power inverter is required 
for those appliances.
For 38204 , with modified sine wave output, some appliances like speed controllers found in some 
fans, power tools and some power tools’ AC charger may not like the modified sine wave generated  
by the inverter, those appliances may not work or may be damaged if they are connected to the
inverter. If you are unsure about powering any device with the inverter, contact the manufacturer of the 
device.

Estimate Run time on Load

Following run time is an estimate based on using a 12V-120AH battery bank for reference. Actual run 
time may vary. those appliances may not work or may be damaged if they are. 

One Year Limited Warranty

The limited warranty program is the only one that applies to this unit, and it sets forth all the 
responsibilities of Nature Power. There is no other warranty, other than those described herein. Any 
implied warranty of merchantability of fitness for a particular purpose on this unit is limited in duration 
to the duration of this warranty. 
This unit is warranted, to the original purchaser only, to be free of defects in materials and 
workmanship for one year from the date of purchase without additional charge. The warranty does not 
extend to subsequent purchasers or users.
Manufacturer will not be responsible for any amount of damage in excess of the retail purchase price 
of the unit under any circumstances. Incidental and consequential damages are specifically excluded 
from coverage under this warranty. 
This unit is not intended for commercial use. This warranty does not apply to damage to units from 
misuse or incorrect installation/connection. Misuse includes wiring or connecting to improper polarity 
power sources. 

If you are experiencing any problems with your unit, please contact our customer service department

at 

info@naturepowerproducts.com

 or Phone 

1-800-588-0590

 before returning product to retail store. 

After speaking to a customer service representative, if products are deemed non-working or 
malfunctioning, the product may be returned to the purchasing store.
If such a unit is returned less than one year from the purchase date, manufacturer will repair the unit 
or, at its discretion, replace it, free of charge. If the unit is repaired, new or reconditioned replacement 
parts may be used, at manufacturer’s discretion. A unit may be replaced with a new or reconditioned 
unit of the same or comparable design. The repaired or replaced unit will then be warranted under 
these terms for the remainder of the warranty period. The customer is responsible for the shipping 
charges on all returned items.

Limitations:

This warranty does not cover accessories, such as adapters and batteries, damage or defects result 
from normal wear and tear (including chips, scratches, abrasions, discoloration or fading due to usage 
or exposure to sunlight), accidents, damage during shipping to our service facility, alterations, 
unauthorized use or repair, neglect, misuse, abuse, failure to follow instructions for care and 
maintenance, fire and flood.

Nature Power Inverters are Made in China.
 

Power Inverter DC Input Connection:

   

Connect one end of the negative DC input cable to the Power Inverter DC negative terminal 

    (black). Connect the other end of the negative DC input cable to the battery negative terminal.
•   Make sure the Disconnect Switch is in the OFF position.  
•   Connect one end of the positive DC input cable to the Power Inverter DC positive terminal (red). 
    Connect the other end of the positive DC input cable to one of the terminal of the Disconnect 
    Switch.
•   Connect a DC input cable between the other terminal of the Disconnect Switch and one side of 
    the terminal of thefuse holder. 
•   Connect a DC input cable between the other terminal of the fuse holder and the battery positive 
    terminal.
•   Install the selected fuse to the fuse holder.
•   Turn Disconnect Switch to ON position.

Connect unit using the Lighter plug cable:
CAUTION:

 Due to the limitations of the 12V lighter plug socket in vehicles, the unit should be used 

     with the DC cable with lighter plug only to supply AC power to products that require 150W

  
    (120VAC/1.3 A) or less. If the appliance requires more than 150W, use the optional DC cable

 

clips 

    for battery connection.
•   Attach the red ring-type connector to the positive (+) DC terminal (red) on the power inverterand 
    connect the black ring type connector to the negative (-) DC terminal (black) on the Power inverter.
•   Tighten the nut on each DC terminal.
•   Insert the light plug of this cable to the fused 12V lighter plug socket.
•   Unit is ready for use.

Connect unit using the Battery clips cable:
CAUTION:

 Please be sure all the connections are tight before the use of the unit.

•   Attach the red ring-type connector to the positive (+) DC terminal (red) on the power inverter and 
    connect the black ring type connector to the negative (-) DC terminal (black) on the Power inverter.
•   Attach the negative (black) clip to the negative (-) battery terminal.
•   Attach the positive (red) clip to the fuse or circuitry breaker of the 12V battery bank as indicated on 
     ‘Typical Wiring block diagram of the Power Inverter’ on page 5.
•    Unit is ready for use.

Testing the Power Inverter:

•   Turn unit on by using the On/Off button on the unit. The ‘Power’ light turns on indicating the Nature 
    Power Inverter is ON. AC output is now available.
•   Plug in a small AC load like a 25W table lamp or small appliance to the AC socket to verify AC is 
    

 

available. 

•   The unit is successfully installed and functioning properly.

Test the GFCI monthly:

•   Use the following instruction to perform a monthly test on the GFCI to ensure the GFCI is 
     functioning properly.
•   Turn unit on and plug a small AC load (40W light bulbs) to the GFCI.
•   Check the AC load is ON.
•   Press ‘Test’ button and observe a click sound. Check AC load is turned off.
•    Press ‘RESET’ button and check the AC load is back ON again.

WARNING:

 

RISK OF EQUIPMENT DAMAGE 

•   Do not plug surge-protected power bars into the unit’s 120 VAC outlets. The surge protected 
     components on the surge-protected power bar may not like the modified sine wave output 
     generate by the inverter.
•   Do not connect an AC power source like utility power or generator to the unit 120 VAC outlets.
 

Turn ON and OFF the unit

•   Toggle the On/Off switch to ‘ON’ position to turn unit ON.
•   ‘Power’ indicator will turn green. 
•   120 VAC Output is available at the AC output socket. (For 38304, 5V USB is also available.)
•   Toggle the On/Off switch to ‘Off’ position to turn unit off. ‘Power’ indicator will turn off.   
     

  

Problem Symptom 

Solution 

No AC output and 
‘Power’ indicator is off. 

The unit is off 

Turn unit ON using the toggle switch 

No power to inverter 

Check fuse or the Disconnect switch (if 
installed) is either blown or turn OFF 

No AC output. ‘Fault’ 
indicator is ON 

Unit detect fault and has 
shutdown  

Verify the error condition and make correction 
and reset unit 

Products connected to 
unit malfunction or 
overheat (38204 ) 

Products connected to unit do 
not accept modified sine wave 
output generated by the 
inverter  

Products are not compatible with the modified 
sine wave output generated by inverter. See 
“AC Load on Power Inverter” in Section 4 . Use 
NATURE POWER Inverter with sine wave 
output 

No AC output. 

Power

’ 

indicator is ON (38304  

only

GFCI was tripped 

Check load. Reset the GFCI by pressing the 
reset button on the GFCI 

 

7. WARRANTY 

Customer Service: 1-800-588-0590 
Email: Info@naturepowerproducts.com  
Website: 

www.naturepowerproducts.com

 

4.  UNIT OPERATION

5. TROUBLESHOOTING

To trouble shoot the unit, please note the error code display on the main unit and review the 
“Understanding the Error Codes” in section 4.

Load Consumption 

Estimate 

Run 

time 

Cordless Phone 

5W 

150 hrs 

Clock/Radio 8W 

100 

hrs 

Table Lamp 

40W/60W 

27 hrs/ 18 hrs 

Freezer (8.8 cu. ft.) 

80W 

15 hrs 

20” LCD TV 

100W 

11.5 hrs 

Sump Pump (1/2 hp) 

350W 

Not applicable (surge too high) 

 

6. SPECIFICATIONS 

 

Note: Specifications are subject to change without notices. 

Specification 

38304 38204 

Inverter

 

 

  AC Output Power 

400W 

  AC Output Current 

3.3A

 

3.3A

 

  AC Surge Power (Peak) 

800W 

  AC Output Voltage 

120Vac 

60Hz 

120Vac 

60Hz 

  AC Output Waveform 

True Sine Wave   

(<3%THD) 

Modified Sine Wave 

  Nominal DC Input Voltage 

12.5 VDC 

  No Load battery draw 

< 0.8 ADC 

< 0.3 ADC 

  DC Input Voltage operating range 

10.5 

 15.5 VDC 

  Under Voltage Alarm 

11.2 VDC 

  Under Voltage Shutdown  

10.5 VDC 

  Under Voltage Recovery 

11.8 VDC 

  Over Voltage Shutdown 

15.5 VDC 

  AC Output socket 

GFCI Duplex receptacle

 

NEMA 

5-15P 

DC Output 

 

  USB Output 

5V / 1000mA 

Not applicable 

Safety and Environmental

 

 

  Conformance 

UL 458,  

CSA C22.2 no. 107.1 

 

UL 458,  

CSA C22.2 no. 107.1 

  Agency Markings 

cETLus 

cETLus 

  Operating Temperature 

0°C to 40°C (32°F to 104°F) 

  Storage Temperature 

-20°C to 60°C (-4°F to 140°F) 

  Relative Humidity 

5-90% noncondensing 

  Operating Altitude 

Up to 9,843ft (3000 meters) above sea level 

Weights and Dimensions

 

 

  Weights 

3.8 lbs (1.73 kg) 

1.6 lbs (0.73 kg) 

  Dimensions 

6.9x7.9x2.3

(175x200x89mm) 

4 x 6 x 2

 (101x152x51mm) 

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