40-100VDC two wire lcd backlit voltmeter

[wesnewell]

Anyone tried one of these on a fully charged 24s lipo pack at 100.8V?
http://www.ebay.com/itm/DC-40-100V-LCD-Digital-Voltage-Panel-Meter-Voltmeter-with-blue-backlight-/251419209930

 

[dogman dan]

Nice that it goes to 100v. You could just ride a block, then plug it in. I used to do that with my CA, when I had 24s on my race bike.

 

[cal3thousand]

It's really nice that it only requires 2 wires. I wonder how accurate they are.


Already have a CA, but this rigged to a momentary switch on my pack would make for a quick and dirty level check. I have a tiny one on my wife's 12S Lipo pack and it has proven VERY convenient for me. I can quickly have a decent idea (although not exact) of the SOC (since she really doesn't pay attention to it at all)

 

[d8veh]

We use this one because it's waterproof (supposedly):
http://www.ebay.co.uk/itm/Waterproof-Digital-Voltmeter-DC-15V-To-120V-Red-Led-Voltage-Digital-Panel-Meter-/400413773075?pt=UK_Toys_Games_Outdoor_Toys_Garden_Games_Activities_LE&hash=item5d3a854d13

 

[Hwy89]

I can't say for sure about the 100v model but I have several of the 0-20V ones monitoring the 12V battery bank for my solar PV system. One of them reads the voltage on the batteries and the other reads the output of the panels. Every day when the batteries are full the panels go to about 27v open circuit and the meter goes blank when it gets above 20V. When the sun sets and the panel voltage drops below 20 the meter starts working again. It has been doing that for two years and it still works. I expected the backlight to burn out but that hasn't happened either.
If the 100v meters work the same way you will still be at around 99% when the meter starts reading.
I checked them for accuracy against my multimeter when they were new and they were within .5v of my meter and the two panel meters agreed with each other. That was close enough for me.

 

[Samd]

I've used a lot of the 0-30V ones to 36v and found them great. There's a tiny trimpot on the inside back of the PCB to adjust voltage on those.

I haven't seen a two wire version below 30V before - that is a great find. Well done!

 

[wesnewell]

We use this one because it's waterproof (supposedly):
http://www.ebay.co.uk/itm/Waterproof-Digital-Voltmeter-DC-15V-To-120V-Red-Led-Voltage-Digital-Panel-Meter-/400413773075?pt=UK_Toys_Games_Outdoor_Toys_Garden_Games_Activities_LE&hash=item5d3a854d13

Yeah, I've been using a green one like that for a couple of years. Even have an extra one, blue. Just can't read it in direct sunlight. Have to shade it a little to read it. I don't ride in the rain, but could waterproof it with a spray in seconds.

 

[d8veh]

We use this one because it's waterproof (supposedly):
http://www.ebay.co.uk/itm/Waterproof-Digital-Voltmeter-DC-15V-To-120V-Red-Led-Voltage-Digital-Panel-Meter-/400413773075?pt=UK_Toys_Games_Outdoor_Toys_Garden_Games_Activities_LE&hash=item5d3a854d13

Yeah, I've been using a green one like that for a couple of years. Even have an extra one, blue. Just can't read it in direct sunlight. Have to shade it a little to read it. I don't ride in the rain, but could waterproof it with a spray in seconds.

OK, that makes sense. I wondered why you were asking the question. It's not a problem for us in the UK because we don't get much sunshine