Westend,
The GT power is an inline meter designed for the Lifepo4 radio control toy crowd.
It's display will read
Volts
Amps
watts
Amp peak
Watt peak
Voltage minimum
Amp hours( upto 64, then flips to Zero)
Watt hours.
There is a Turnigy meter, that appears identical, that will also display the time since current started to flow which could be a nice figure to have too
It claims 130 amps but has 12 awg aluminum leads. I think it says 50 amps continuous, but it has 12awg aluminum leads, so......
It is a neat device, but does heat up.
My powerpoles heat up a lot too
As well as the 10AWG on either side of the meter when passing 36 amps.
I might still get a shunted meter so I can use fatter wire. I'd love to get some 6 awg onto the Gtpower meter but my soldering skills are not adequate.
Here is a link to the GT power meter. it is a clone of a "watt's up" meter which costs a bit more and is a little more accurate if some youtube videos are to be believed.
In the related items they show some that are even less expensive and all sorts of clones too.
Here is a video made by a guy with enough tools to measure accuracy of these devices:
http://www.youtube.com/watch?v=Lxv9Rozs774Not perfect but fairly close.
This guy opens one up on camera if you want to see the guts and why I feel I cannot attach fatter copper wires to the circuit boards:
http://www.youtube.com/watch?v=OhzrHdgwkbg I'd really love to have this thing be wired better so it would not heat up so much.
A few hours after I backed off voltage to 13.6v last night, the northstar
AGM was only accepting 0.03a. according to my clamp on meter. When The automatic Schumacher was used on the Northstar at 25 initial amps, the clamp on meter always read a bit higher after it decided to drop the AGM to 13.6v.
The GTpower meter is not very good at reading tiny currents.
