Epanel 500 Amp shunt and a Doc Wattson?

[dgd]

Tom
We also should have the first revision of Current Sense Modules for the Classic in about 4-6 weeks. You will make a great Beta tester for one as you are reading the ModBus so that will be a huge help.

Ryan

How is this CSM development progressing? Any indication of when it will be available?

dgd

[boB]

Tom
We also should have the first revision of Current Sense Modules for the Classic in about 4-6 weeks. You will make a great Beta tester for one as you are reading the ModBus so that will be a huge help.

Ryan

How is this CSM development progressing? Any indication of when it will be available?

dgd

It's going very well !

I really shouldn't give any dates, but probably still 3 months out...  Just because of the typical red tape in getting new products out.

I think you're gonna love this !  Looks like it is going to be very accurate too.

boB

[Halfcrazy]

We should of course have a special group of Alpha Testers on this product so feel free to bug me via Email or PM here for that

Ryan

[SolarMusher]

Email sent.
Erik

[TomW]

We should of course have a special group of Alpha Testers on this product so feel free to bug me via Email or PM here for that

Ryan

Ryan;

You know I am in.

Tom

[Resthome]

We should of course have a special group of Alpha Testers on this product so feel free to bug me via Email or PM here for that

Ryan

Be glad to participate, Ryan.

[Andrejs]

We should of course have a special group of Alpha Testers on this product so feel free to bug me via Email or PM here for that

Ryan

... and I would be interested as well!

Andrejs

[Vern Faulkner]

We should of course have a special group of Alpha Testers on this product so feel free to bug me via Email or PM here for that

Ryan

What's the worst that could happen?

I'm in, if needed.

[dgd]

So what are  main features of this current monitor?
- resides close to a 50mv 500A shunt,  what about other shunt options?
-16bit A to D to give at least 0.1A accuracy over +400A to -400A
-cpu included to do modbus (ugh!) interface via serial or ethernet
-MNGP can be wired in to provide lcd + rubber button interface
-MNGP on a Classic can see it and report
-basis for a battery monitor
-a web interface
-a new firmware release for the Classic to use data from this monitor or monitors
-perhaps get a more accurate battery voltage measurement too
-maybe deal with a 150A shunt for Classic input and report accurate A and V
-Classic ignores its builtin Amps/Volts measurements for input and battery, and followme A and V  from monitor
-aux alarm output if current extraction from battery exceeds a configured limit, relay control
-surge events recorded - logging 380 days

dgd

[SolarMusher]

Yes you are absolutely spot on. The MNCSM will allow that Classic to end its absorb charge based on End Amps but the TRUE end amps.

HI Ryan,
Could the CSM be mounted on the same shunt that is already used by a Magnum BMK or does it needs its own shunt?
Erik

[boB]

Yes you are absolutely spot on. The MNCSM will allow that Classic to end its absorb charge based on End Amps but the TRUE end amps.

HI Ryan,
Could the CSM be mounted on the same shunt that is already used by a Magnum BMK or does it needs its own shunt?
Erik

That's a great question that I had not thought of but I'm not sure it would matter ?

It is a local voltage developed across the shunt and read across the shunt so I bet it would
work.  I won't bet my life on it, but I think it might just work.

boB

[boB]

So what are  main features of this current monitor?
- resides close to a 50mv 500A shunt,  what about other shunt options?
-16bit A to D to give at least 0.1A accuracy over +400A to -400A
-cpu included to do modbus (ugh!) interface via serial or ethernet
-MNGP can be wired in to provide lcd + rubber button interface
-MNGP on a Classic can see it and report
-basis for a battery monitor
-a web interface
-a new firmware release for the Classic to use data from this monitor or monitors
-perhaps get a more accurate battery voltage measurement too
-maybe deal with a 150A shunt for Classic input and report accurate A and V
-Classic ignores its builtin Amps/Volts measurements for input and battery, and followme A and V  from monitor
-aux alarm output if current extraction from battery exceeds a configured limit, relay control
-surge events recorded - logging 380 days

dgd

Since ths MN shunt monitor just tells the Classic what it is reading through the Aux 2 terminals,
most all of the software/firmware is done in the Classic itself so I believe most if not ALL of
your list will have a very good chance of being implemented.

And on the voltage accuracy from the Classic itself, this is going to be done using a calibration
table for just that purpose so that will also be addressed.  The Classic is already modbus (yech
for you) so that is happening and of course the web interface so you should get all of that too.
Not sure about a 150A shunt, but that ~could~ of course be done with a simple re-calculation.
The hard part about using non-standard shunts is that the distance between screws are
different than the 500A/50mV shunts and so you would have to run a wire or a piece of copper
from one of the CSM screw hole pads to one of the different shunt screws.  Otherwise it should
be pretty easy for that to work as well.  Same modification for a 1000A/1000mV shunt which
are larger than the 500A/50mV shunts.

And yes, of course, 0.1 amp resolution with +- 0.05 amp accuracy.   Actually, I think it may
be slightly better than this from what I am seeing so far.

boB

[SolarMusher]

Yes you are absolutely spot on. The MNCSM will allow that Classic to end its absorb charge based on End Amps but the TRUE end amps.

HI Ryan,
Could the CSM be mounted on the same shunt that is already used by a Magnum BMK or does it needs its own shunt?
Erik

That's a great question that I had not thought of but I'm not sure it would matter ?

It is a local voltage developed across the shunt and read across the shunt so I bet it would
work.  I won't bet my life on it, but I think it might just work.

boB

Hi boB,
Ok I will try it this way, it would be great if one could use it also as an upgrade into an existing Classic.
How will you want to sell it? As an integrated or a "stand alone" MNBCM part?
Erik

[boB]

How will you want to sell it? As an integrated or a "stand alone" MNBCM part?
Erik

I'm pretty sure it will be sold as a circuit board and plastic cover kit with instructions
in a cardboard box.

boB

[SolarMusher]

I'm pretty sure it will be sold as a circuit board and plastic cover kit with instructions
in a cardboard box.

Great, thanks boB.