boB made a comment on Wind-Sun about connecting a Modbus battery monitor to a Classic to control Absorb setup. Is there a Modbus-enabled battery monitor on the market that is reasonably priced? I was going to write firmware for one, based on the Arduino, this Summer and won't waste my time if there's something that can be had for less a kilobuck or so ...
Nothing yet that I know of. We will be making one and it's not that difficult of course, but we just don't
have the resources this month.
Might be a cool open source modbus project ! I think that Arduino even has some modbus libraries.
Julie, I bet you could make one. Not sure if the A/D on the AVR has the resolution for a battery monitor though.
boB
Hi,
i need to monitor 48V battery health, 24 cells split in to 4 zone.
this will be 12Volt in each channel, need to monitor the cells for health.
please suggest.
i will for sure have a controller and a Modbus interface.
but the analog side i need to have a low cost solution.
Quote from: boB on April 02, 2011, 06:57:38 PM
Nothing yet that I know of. We will be making one and it's not that difficult of course, but we just don't
have the resources this month.
Might be a cool open source modbus project ! I think that Arduino even has some modbus libraries.
Julie, I bet you could make one. Not sure if the A/D on the AVR has the resolution for a battery monitor though.
boB
Were I doing that, I'd put a four channel 12 or 14 bit A/DC that talked SPI on the board and have the ATmega mostly do Modbus via a MAX485 or MAX232.
But I don't do open source anything anymore. Too many ungrateful people stole code I wrote and claimed it for their own. If people want stuff from me, they can damned well pay for it!