Recent posts

#1

New Product Ideas and Discussion / Re: A CLASSIC PRODUCT ADDITION...

Last post by ClassicCrazy - May 21, 2024, 11:07:21 PM

I have a friend who uses PLC to do things like you have drawn up. It can read modbus and sensors and has built in relays and logic , etc.
I don't know PLC's but have messed around with Node Red a little bit which can do all by running on a Raspberry Pi or PC . There is no end to the coms , inputs , outputs, of any type with Node Red. But I am no expert in that - just know the basics .
Larry

#2

New Product Ideas and Discussion / Re: A CLASSIC PRODUCT ADDITION...

Last post by Barry Fields - May 21, 2024, 08:48:06 PM

It is best that I drag this all together in an illustrative format.  Most all the proposals have been discussed in detail in a myriad of posts over the last year or so.

I am indeed open to answer any questions?

I want to express my thanks to many of you for your patience and cooperation.

#3

New Product Ideas and Discussion / Re: A CLASSIC PRODUCT ADDITION...

Last post by Barry Fields - May 21, 2024, 05:46:11 PM

They are ARM Cortex-M3  parts from NXP.

Am I correct in that mcu is limited to 8adc channels (4 differential)?

In which case maybe STM32F030 might be better suited with "The 12-bit analog to digital converter has up to 16 external and two internal (temperature sensor, voltage reference measurement) channels and performs conversions in single-shot or scan modes. In scan mode, automatic conversion is performed on a selected group of
analog inputs.

That would allow for 4bank monitoring (uses 8 channels) plus Remote Battery Sensing (1 input).

In general if you wanted an MCU to be able to communicate with either modbus or canbus, can that be done with one bridge and one r485 connector or would you need two?

I am still learning.

#4

New Product Ideas and Discussion / Re: A CLASSIC PRODUCT ADDITION...

Last post by boB - May 21, 2024, 03:53:26 PM

More stuff I do not know:

In the Classic is the battery voltage stored in a registry as a 10bit value?
Could a more accurate 12 bit value be stored and processed?

In general if you wanted an MCU to be able to communicate with either modbus or canbus, can that be done with one bridge and one r485 connector or would you need two?

Most values are stored as 16 bit words.

Not sure of the A/D word size.  Either 10 or 12 bits.

boB

#5

New Product Ideas and Discussion / Re: A CLASSIC PRODUCT ADDITION...

Last post by boB - May 21, 2024, 03:51:56 PM

Is my security clearance high enough to ask what MCU is used in the Hawkesbay and Barcelona ( I presume they are the same)?

They are ARM Cortex-M3  parts from NXP.

boB

#6

New Product Ideas and Discussion / Re: A CLASSIC PRODUCT ADDITION...

Last post by Barry Fields - May 21, 2024, 12:22:34 PM

More stuff I do not know:

In the Classic is the battery voltage stored in a registry as a 10bit value?
Could a more accurate 12 bit value be stored and processed?

In general if you wanted an MCU to be able to communicate with either modbus or canbus, can that be done with one bridge and one r485 connector or would you need two?

#7

Lithium / Solid State Lithium

Last post by Barry Fields - May 21, 2024, 11:51:25 AM

Need an opinion

https://www.solidpowerbattery.com/overview/default.aspx

#8

New Product Ideas and Discussion / Re: A CLASSIC PRODUCT ADDITION...

Last post by Barry Fields - May 20, 2024, 02:37:21 PM

Is my security clearance high enough to ask what MCU is used in the Hawkesbay and Barcelona ( I presume they are the same)?

#9

System Design and Layout / Re: DCM9040 battery monitor

Last post by Barry Fields - May 20, 2024, 10:39:59 AM

Just installed my new DCM-120100C meter.

Externally the same as the older DCM-9040. Fits in the panel hole just fine. External 100a 75mv shunt placed in the low side PV total to charge controller.

The new calibration procedure is much more straight forward if ya carefully read the instructions provided.

Seems to be performing well for monitoring PV power delivered by the panels to the charge controller.

I have no use for the AH or SOC readings so can make statement concerning them.

#10

New Product Ideas and Discussion / Re: load management

Last post by ClassicCrazy - May 20, 2024, 10:39:01 AM

While we are talking about load balancing, has anyone used or had experience with a 220v to 110v step down unit?

I've never seen it before.
It's continuous 1200W and 3kW maximum.  Only weighs 13.4  pounds.

What is in it and how does it work ?

3kW for 30 minutes sounds like it might be a real transformer in it.
Almost too cheap even for 1200W if it is a transformer.

Their advert pictures are kind of funny.  The box is shown on the table where the man and woman are working, like in the kitchen but the box is not doing anything and the meter is at zero.   But man and lady are sure happy !

boB

Ha ha Bob - he is picking up a chili pepper with two spoons like it has the cooties .
She is making one weird smoothy from spinach and milk !
Maybe this is the new era of AI generated  advertisements
Create a photo of two people who are happy to be using their step down converter to make a meal - ha ha .
Larry