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Article Number: 40290323 BMSS PRO Battery Monitor


The WP-BMSS Battery Monitor Smart Shunt completes your WhisperPower energy supply system by providing full details about the state of your battery or battery bank. All information is communicated via WhisperConnect, thereby integrating this product into a range of battery chargers, generator sets and inverters from WhisperPower, to be read out by the WPTouch system control panels (40280105, 40280101, 40280102, 40280103).


  • Full WhisperConnect CAN bus functionality
  • Battery ‘fuel gauge’ for energy systems
  • Human interface via WhisperTouch panel or optional remote ROM
  • Connectivity by fully programmable alarm contacts
  • Compatible to all types of batteries, including Li-Ion
  • One product for 12V, 24V and 48V systems
  • DIN-rail or wall mountable
  • Best choice to complete your energy system


Weight (Kg)<0.5
Dimensions (h × w × d) (mm)75 × 90 × 50



Power supply voltage6-60V DC
Current draw (standby)<9mA @ 12V
Operating temperature-20°C to + 60°C
Voltage measurement range6-60V DC
Battery capacity20-9999Ah
Shunt compatibility50-1000A, 50-60mV
Voltage resolution+-0.001V
Current resolution+-0.1A
Amp hour resolution+-0.1Ah
Time remaining resolution0-480 hours, +- 1 min
Temperature resolution+-1°C
Voltage measurement accuracy0.3%
Current measurement accuracy0.4%
Temperature accuracy+-2°C
State of charge accuracy+-1% of battery capacity
Local user interfaceStatus LED, ROM
External communicationWhisperConnect (CAN bus) -WP temp sensor - USB
Multipurpose contact2 nc/no potential free contacts
Operation temperature-20°C to +40°C
Storage temperature-40..80 °C, Relative humidity in operation/ storage up to 95% non-condensing



Measurement shunt included1200A, 50mV

WhisperPower BMSS PRO Battery Monitor

SKU: WP-40290323
  • We understand there may be circumstances where you may need to return an item to us. Our returns policy is set out below. We will always process returns in accordance with this policy.


    If you have any questions about making a return, or about the contents of this policy, you can contact us via email at


    If you are not happy with the way we deal with your return, you can raise a complaint. Please email us via for further assistance.


    If You Change Your Mind

    This section sets our policy in respect of 'change of mind' returns. Please refer to the section below in relation to faulty items.

    Before Dispatch

    If you change your mind after you place an online order, you will have 15 minutes after placing your order to cancel it. You can do this by contacting us within this period. Please also indicate the time the order was placed, and the time of sending the email for reference. 

    If payment has not yet been taken, we will not charge you after you have cancelled your order. If payment has already been processed, a refund will be sent to your original payment method.


    Changing Your Mind - After Dispatch

    If you change your mind after you receive your item, you should notify us of this within 14 calendar days of you receiving your item.


    In order to return your item you should:

    1. Ensure that the item is still in the same condition that it was in when purchased, with all tags and packaging in tact. 

    2. Notify us within 14 days that you would like to return the item by emailing us via

    3. Once you have notified us of your return, you will receive an acknowledgement and instructions confirming how to return your item to us. Returns should be returned to us via a courier with relevant tracking methods.

    4. You must cover the postage and shipping costs of your return. You should purchase a shipping labels for your courier.

    5. You must ensure that your item is returned to us within 14 calendar days of us acknowledging your return request.


    Once we received your return item, we will conduct a quality check and we will notify you of the outcome of this. If your item is returnable, your refund will be sent to your original payment method within 10 calendar days.


    If your item is faulty of unsatisfactory, please refer to this section.


    We really hope that you will not need to return a faulty item to us. If you do need to do so, please follow these instructions.

    If you are returning a faulty item within 30 calendar days of receiving your goods (or them being fully installed, if we have installed them for you) you can request a refund from us.

    If you are returning a faulty item after this period you may request a repair or replacement from us in the first instance. If you are still not happy after a repair or replacement, you may be entitled to all or some of your money back, in accordance with your consumer rights.

    If the issue relates solely to a faulty installation (by us), you may request that the item is repaired or replaced and re-installed.


    How To Return a Faulty Item

    If your item is faulty, you should:

    1. Notify us of the faulty by email via

    2. Once you have notified us of the fault, you will receive an acknowledgement and instructions confirming how to return your item to us.

    3. We will cover the postage and shipping costs of your return and instructions confirming how to return your item to us.

    4. The courier will usually specify that the label be used within a fixed period. You will be provided with instruction about this with the shipping label.


    Once we received your faulty, we will conduct a quality check and we will notify you of the outcome. If you are entitled to a refund, this will be sent to your original payment method within 10 calendar days following the outcome of the quality check.


    If you entitled to a repair, replacement or re-installation, we will arrange an engineer attend the site within 10 calendar days to assess the damage / issue and conduct a quality check.


    The rights in this section exist separately from any warranty you maye also have. Please contact us via to discuss any applicable warranty.

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