My thought as well.

Here is what mfg says

Hi Ted,

You are correct with the amperage draw. We do recommend getting an inverter, if you are using a device at 2.0LPM or higher on continuous or 4.0 or higher on pulse. I hope you can find my recommendations below helpful.


Tip #1:
When the device is connected to DC power try twisting the DC cord in the DC/cigarette outlet. This will scrape the contact point hopefully making a better connection for the device.

Tip #2:
There may be too much of a power draw on the vehicles electrical system (i.e.: air conditioning, radio, GPS system, etc.) Try eliminating some of these draws in order to boost power to the device. The device requires a minimum of 150watts (15amps) to run on all settings and to charge the batteries effectively. The vehicle may only be equipped to provide up to 120watts (12amp). This information can be verified by looking in your user manual for your vehicle. While the device is connected to DC power you can access the “Provider Screen” to see how much voltage the device is actually receiving (instructions on how to access the provider are screen below):

Tip #3:
End Users may need to purchase an inverter. I have also attached information for you about an inverter that our engineering team found that works best with our POC. Please be sure that the power inverter is attached directly to the vehicle battery.

Samlex Power Inverter Complete Kit Requirements

Samlex Power inverter – Model : SAM-450-12
(2) Ring Terminal, 6 AWG, NO.10 screw size, McMaster PN:7113K225
(2) Brass flat washer, NO.6 screw size, .156 ID, .312 OD, McMaster PN: 95395A105
10 ft., 6 AWG, Red, Wire
10 ft., 6 AWG, Black, Wire
Little Fuse Inc. 60 Amp, 30 VDC, PN: 0299060.zxnv
Maxi fuse holder PN: MAHc0001zxj


Please note that this is only a recommendation and is not a requirement to buy. The listed parts above can be purchased on amazon.com (or an automotive service provider) and can be installed by an auto mechanic.

*If you decide to purchase an alternative inverter please be sure the inverter is a minimum of 450watts and connects directly to the vehicle battery. Inverters that connect to the DC/ cigarette outlet may not function properly and may still cause the device to alert for ‘low external power’.


Accessing the Provider/ Dealer Screen:
1) Press and hold the Mode and Down Arrow keys at the same time till a 2nd screen appears (to exit screen press UP Arrow).
2) You are now viewing the Provider/Dealer Screen (please note that dealer screens may vary, however, the basic information below can still be found):
cid:[email protected]

3) Information provided on this screen includes:
I. Serial Number (SN) of unit
II. How long the unit has currently been running.
III. Temperature readings for the battery, motor, and display.
IV. Bay 1 (B1) and Bay 2 (B2) information on the batteries: charging/discharging; battery charge %; expected time left on battery (mins.) **If the batteries are charging, there will be a (-) mA number on the screen, as pictured above; batteries being used will be a (+)mA number. This verifies that the batteries are charging **
V. VIN: Voltage In (You want to be getting at least 12V, ideally 12.5V in the car) (if the voltage reads 11.5 and lower the unit will alert low external power and will revert to batteries for a steady source of power and you may need to purchase an inverter).
VI. Flow and Purity readings

Batteries Not Charging:
If there is no Lightning Bolt reduce the device setting to 0.50 Continuous and wait for the indicator to appear. Increase the setting by 0.5LPM increments to the desired flow rate. If the battery is fully depleted, turn off the device to expedite charge times. (Batteries will not charge on settings higher than 2.0 Continuous or 4.0 Pulse).


Best Regards,

Maryna Pov
O2 Concepts- Technical Support
199 Park Rd Extension
Middlebury, CT 06762
Office877) 867-4008 x367
[email protected]
O2 Concepts