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post #1 of 13 Old 06-16-2019, 02:32 PM Thread Starter
RDinNHandAZ
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Meter that goes both ways

I keep looking for a meter to replace my Bayite that measures the power used in my van. I’d like a meter that measures the battery use and recharge. I found this:

https://smile.amazon.com/DROK-Multim...ateway&sr=8-20

Anyone have experience with it? How can it work without a shunt? My inverter could draw 90 amps and this cannot carry that!

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post #2 of 13 Old 06-16-2019, 03:04 PM
GaryBIS
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Hi RD,
Don't have any experience with that one, but this one was suggested by Dennis on my site:




Here is a lengthy Youtube on it:


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136 WB PM, high roof, 1500, gasser, 2014.
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post #3 of 13 Old 06-16-2019, 04:12 PM
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Wink Bi Meters

Im into those & mine does that - bluetooth too & works/connects easy

You are not gonna like the price

Here is what I have, but even in USD your gonna spend “Beast” money

https://www.victronenergy.com/batter.../bmv-712-smart

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post #4 of 13 Old 06-16-2019, 04:26 PM
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Victron iPhone Screen Shots My System

RD

Some photos for you

The one that shows negative, then spikes to over positive 40amps is after after I started the engine

If you want to know more let me know, I will have to delete those photos off my membership here (next week or so) as Im getting filled up
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post #5 of 13 Old 06-16-2019, 04:42 PM
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Wink GoPower

By Chance

When I was shopping locally for batteries I went into GoPower,s local office

Saw their BM, which is seemingly identical to Victrons with a different face plate

Same Shunt - Everything

FYI


https://gpelectric.com/products/go-p...ttery-monitor/

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post #6 of 13 Old 06-16-2019, 05:45 PM
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RD,
I think the higher capacity ones use hall effect instead of a shunt.

I have a different hall effect one it does ok counting down but does seem to count up very well, it likes a big charging current to get get back to 215 ahr.

I also have the one Gary linked to, I like it, wish I would have gotten it first.

So I have 2 SOC meters connected, just because
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post #7 of 13 Old 06-16-2019, 06:15 PM
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Quote:
Originally Posted by phil View Post
RD,

...
So I have 2 SOC meters connected, just because

You need three, so they can vote on which is the right reading


Gary

136 WB PM, high roof, 1500, gasser, 2014.
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post #8 of 13 Old 06-16-2019, 07:48 PM Thread Starter
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Quote:
Originally Posted by RV8R View Post
Im into those & mine does that - bluetooth too & works/connects easy
You are not gonna like the price
Here is what I have, but even in USD your gonna spend “Beast” money
https://www.victronenergy.com/batter.../bmv-712-smart
I don’t care how much my battery gets refilled more than about $30 worth so the Victron is out for me. I’ve heard great things about their components but $200+ is not in my meter budget. Same for the Bogart Product that is somewhat less.
I might have made it clearer if I had pointed out I want it to fit in the same rectangular face mount as my Bayite. The one I showed would and I don’t see how it works unless there is a Hall Effect transducer for the ground wire or something???
Thanks I’m looking at everything you’ve put up.

I’m now thinking this one does what I want in the screen size to replace my Baylight



2015 136" HT Diesel 1500 Sandstone Pearl Metallic
Campervan build see:https://www.promasterforum.com/forum...ad.php?t=37177
You can browse my build pictures at http://tinypic.com/RDsPictures
Conversion Costs see: https://www.promasterforum.com/forum...ad.php?t=85761
$500 solar and $700 complete Electrical: https://www.promasterforum.com/forum...ad.php?t=71562
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post #9 of 13 Old 06-16-2019, 08:58 PM
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I've played with DROK products before (I think it was a small dc-dc converter), they come out of china and and instructions are pretty limited but they worked as described. I don't have any direct experience with this specific monitor. There are a lot of youtube videos on these units as they have several. Jehu on youtube builds DIY "powerwalls" and battery banks, and he uses these monitors a lot on his projects.

As for measuring input and output independently, there is no way to do that with a single shunt or hall sensor as you'll have discharge and charge at the same time so there is no way for it to know what you are discharging at the same time you are charging. To my knowledge, there is no battery monitor with two inputs (one shunt on the charge sources and one shunt on the discharge).

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post #10 of 13 Old 06-17-2019, 07:42 AM Thread Starter
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nebulight,
Now I am confused and that is a lot more common as each year passes. If the Hall Effect coil circles the negative wire from the battery there will be either a discharge, a charge, or no current. I believe there will never be current going in both ways in the ground wire as the wire carries the net current. Is this true?
Based on my belief won’t the Hall Effect coil record a charge or nothing or a discharge and the sum over time will show my battery discharged some, or full. Occasional resets when I know the battery is 100% SOC should get the thing back in register with my use.
At one time I planned to buy a second Bayite and use the existing shunt and a 4th wire to have one record the use and the other to record the charge. I still believe that is doable but I then need to read both and compute SOC something I want to avoid.

2015 136" HT Diesel 1500 Sandstone Pearl Metallic
Campervan build see:https://www.promasterforum.com/forum...ad.php?t=37177
You can browse my build pictures at http://tinypic.com/RDsPictures
Conversion Costs see: https://www.promasterforum.com/forum...ad.php?t=85761
$500 solar and $700 complete Electrical: https://www.promasterforum.com/forum...ad.php?t=71562
If you must make a mistake, make a new one each time.
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