Digital DC Amp-Hr meter. Ideal for battery or solar panel monitoring
Other products by Lightobject
Item #: EPM-JLD404AH-R
Our Price: $62.00
19 units available


This meter is capable of calculating how much current(amp)is consumed in a minute or in a hour for up to 99hrs. Displays toggle voltage, current, and amp-hrs. It's designed for DC application like a battery charging system or for a solar system power output monitoring. A great tool for electric car monitoring. See EVTV for electrical car conversion with this meter installed.

Key Features of the 404AH Battery Checking System

  • Alarm control for over/under limit
  • Programmable and expandable with ext'l DC shunt for up to 9999A
  • Lowe power consumption
  • Display V, I, amp-Hr


  • Dual Alarm output (relay) J1,J2
  • Power: 12-32V DC
  • Default DC500V,5A
  • Max current: 9999A (an external shunt required)
  • Amp-Hr recording: 0.001~9999AH
  • Sampling: 3/s
  • Control Type: Relays
  • Relay: [email protected], [email protected] DC
  • Display: Red LED
  • Size: 96mm x48mm x62mm
  • Mount Hole: 92mm x44mm x62mm


Model QB404AH
Description DC Battery Tester
Operating power DC
Input DC
Type Digital
Display Color Red
Digit 4 digit


Average Rating:
(based on 1 review)

Showing 1 Review:

by Eric
on 5/14/2016
Still working after 3 years...
I purchased this meter in 2013 for my Prius Plug-in Conversion (EVPLUS) and is an amazing meter. It does everything I need it to do and more. I found that the the documentation is a little hard to understand, mainly in the relay section, and even Jack Rickard's (EVTV) documentation has errors. I used a 12V DC-DC converter to power it. This completely isolates it from the high voltage that it is measuring.
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