Nassa BM-1 Bluetooth Battery Monitor.

Discussion in 'Tech/Mech General' started by PhilandMena, Oct 5, 2016.

  1. PhilandMena

    PhilandMena Funster

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    I have looked at several battery monitors recently and the Victron looked great. Only problem for me would be the wires going to the display monitor and making a hole to mount the monitor. I then found this and apart from the wiring in the battery bay to the shunt and the monitor, there are no other wires. It all works by Bluetooth and I can even get readings from outside of the motorhome. I have found it to be extremely accurate and it has given me data about how many amps I'm drawing for each 12 volt appliance and devices connected to my inverter.
    It has also provided readings for amp input from my on board intelligent charger and confirmed that both my solar power panels ( one mounted on roof and other a suitcase wired directly to leisure batteries) provide current to the leisure batteries at the same time even though they have there own individual controllers.
    A great bit of kit.
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    Last edited: Oct 5, 2016
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  2. PhilandMena

    PhilandMena Funster

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    Whoops couple of typos in the above. It should be titled Nassa Bluetooth..........
     
  3. Wagoneer

    Wagoneer Funster

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    I've got the early version of the NASA BM1. It also only needed 4 wires going to the battery and shunt. Don't quite understand what the Bluetooth does apart from being able to monitor on your phone within 10m of the van. I assume everything is still accessible from the monitor.

    The system on mine only monitors what is going in or out of the leisure batteries, not any individual supply of power, such as the solar panels.
     
  4. PhilandMena

    PhilandMena Funster

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    The purpose of the Bluetooth connection is to save you having any wires from the monitor to the display.
    In essence a Bluetooth signal is sent to your phone/tablet and you have access to a free app or, you can pay for a more comprehensive App with I phone. (The Bluetooth monitor only sends data to the app and does not display anything itself). The App (free one for Android) will show Amps going in or going out of the batteries. Voltage of batteries, amount of time remaining if there is a draw on the batteries and % charge of the batteries. I have managed to measure each individual service that draws from the leisure batteries by disconnecting the 240 V supply (EHU) and covering the solar panel up. The monitor showed full batteries with a 0.0 Amp draw. I then switched on each service, in isolation and measured the current draw. Finally, I uncovered the solar panel and measured to input into the batteries, then connected my second Solar Panel and measured the increase again with both connected.
     
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  5. hilldweller

    hilldweller Funster Life Member

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    If all FUNsters were so competent and logical half the traffic would go.

    I find it very annoying that they would charge extra for an app when they are saving the cost of a display and buttons by you providing them.
     
  6. PhilandMena

    PhilandMena Funster

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    Thank you Brian, I can asure you there are a lot of competent Funsters out there who know a dam site more than me. The App from the I store is around £9.00 or so I'm led to believe and is more comprehensive than the free one for Android devices. I can only assume Apple offered to produce the App for NASA at their own cost in the hope to make a killing afterwards. Time will tell I guess.
     
  7. Wagoneer

    Wagoneer Funster

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    Ah, I understand now. The Bluetooth transmitter module allows you to place it near the leisure batteries and out of the way.

    Fortunately, I had a convenient place to install my monitor and hide the incoming wires, so the basic version of the NASA BM1 worked well for me.

    Agree, good piece of kit. Gives a good indication of the percentage of Amp-hours left in the battery and instantaneous amps drawn or put in.
     
  8. pappajohn

    pappajohn Funster Life Member

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    Close but no coconut.....it's NASA....as in the American space agency.
     
  9. PhilandMena

    PhilandMena Funster

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    Well I did say a couple !
     
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