#12 VOLT BLUETOOTH BATTERY MONITOR SERIAL#
#12 VOLT BLUETOOTH BATTERY MONITOR FULL#

#12 VOLT BLUETOOTH BATTERY MONITOR FULL#

Scanning sensor options and trying to get some realistic expectations is probably a good start on a project like yours.Īccuracy for the hall sensor you linked to above is with reference to full scale, so +/-1% error for the 100A sensor is +/-1A. (I will ofcourse test this with my scope, but just incase someone has theories or facts around this).

#12 VOLT BLUETOOTH BATTERY MONITOR SERIAL#

Are shielded calbles good enough or do I have to convert it to a serial protocol as close to sensor as possible?

I think I will have to make a PCB for them aswell and some 'rubber' casing to make them a bit more suited for the environment they are going to operate in.Īnother question that rises is how long sensor cables can be and how will they be affected by noice. Maybe I will order a few of the tamura sensors to test. I looked briefly on the Honeywell sensors, but they require a inverted amplifier (or voltage divider) in order to reduce input to 5V. and +-0.1A at 10A, is this correct?Īrduino will have a 10bit resolution, so 0-50A will get a resolution of 0.049A.

If I understand this correctly, these are 5V, meaning that then can be connected directly to an arduino?įor a 50A sensor this means the accuracy of the sensor is +-0.5A on 50A. It's a bit of a black art to which I'm not privy, still I think you can do a reasonable job with simple tools and algorithms. Once again IIRC for wet cells the number is often used is 1.2, although in theory you should ask the manufacturer.Īnd of course you can't just read voltage to do this, you have to know the recent current history of the system, like whether the batteries were held in absorption for long enough etc. This is a number that you multiply the current out by (or I guess divide the current in) to allow for the inefficiencies in the battery. To determine the SOC (state of charge) is harder, you have to implement 'Pukets Exponent' (sp?) which basically says you don't get out of a battery what you put in. That makes the problem really easy, get an ACS712 current monitor chip, or read across a shunt with something like an AD8210. You have a 230Ah bank, so I would say anything more than around 20A would be an issue. IIRC as a rule of thumb you charge wet cells at 10% of their AH rating, so for a 140A charging current you would need one heck of a battery bank. Hope someone can point me in a direction. battery health calculated from how much battery drains on a given consumption compared to a new battery bank.remaining time until empty battery based on 'current' consumption.Realtime current charging (alternator, charger, solar panel).Realtime current consumption (broken down in some categories like lights, refrigerator, etc).Some features I would like the monitoring to have: I have 2 battery banks, 1 Start bank and 1 (2x115Ah) service/consumption bank that will deep cycle. I have 3 different chargers (alternator (140A), dual 220V (2x30A) charger and a solarpanel (<35W12V) charger). Does any one have experience with these kind of DC current sensors and can recommend some? (I need different sizes (5,10,30,150)).How can I make the sensor as accurate as possible? (I read someone had used a ADC converter to make the sensor more accurate). I want the current monitor to be as accurate as possible, but the current range from the alternator can be from 0-140A.What is the difference between AC and AC/DC sensors? Is it possible to convert a AC sensor to also work on DC?īy mistake I bought a few different sizes of sensors like SCT-013.I would like a non-invasive measure, so I would like to use 'clamp-on' current sensors like the MT7191-ND The thread did not finish with good recommendations, so I post this. I found an article in the read-only forum regarding 12 Battery current monitoring.

12 volt bluetooth battery monitor