BM-1 LI Battery Monitor for 12V Lithium

The BM-1 battery monitor is designed to monitor performance of 12 volt lead acid battery systems, including AGM and GEL types with capacities of up to 600 Amp hours. It is supplied complete with a precision 100 AMP shunt and a prefabricated cable assembly to enable simple DIY installation. The unit continuously monitors voltage, current (charge or discharge), number of amp/hours (charge or discharge), the batteries state of charge and the time to charge or discharge. It also monitors the voltage of the engine strat battery. This information leads to more efficient use of the battery, which can enhance battery life and reduce the risk of failure.

Features:

• Fully monitors domestic battery/bank
• Monitors voltage of engine start battery

Specifications:

• Supply Voltage
• BM-1  12V 8 – 16 Volts DC
• BM-1  24V 16 – 32 Volts DC
• Supply current 1.5 milliamps
• Battery capacities 5 – 600 AMP Hour
• Load current 100 AMPS Maximum
• Charge current 100 AMPS Maximum
• Shunt Standard 50 millivolt @ 100 AMP

Cables Supplied:

• 100 AMP shunt link to M8 Ring terminal.
  5 Metre from display unit to battery – fused and fitted with ring terminals for shunt, fuse holder and M8 ring terminal to battery.
• Display unit
• Standard 110mm square Clipper case. High contrast LCD, backlit for night viewing.
  Minimum voltage visual alarm
• Simple operation – 4 keys to select backlight, Volt/Amp/State of Charge screen,
  AMP hours or Time to run.

How Does It Work?

A simple and intuitive display shows the service battery voltage, charge/discharge current, state of charge, and time to charge/discharge. The instrument also warns the user when the charge level is too low so that load can be shed or charging commenced to protect the battery. A resettable Amp Hour counter is provided for checking the efficiency of the charging system or keeping a track of power consumption and a second input lets the user monitor the voltage of the starter battery. The simple display format does not mean the internal software is unsophisticated. In fact two separate algorithms are used. One based on integrating amp hours over the charge and discharge cycle, the second based on an adaptive internal mathematical battery model.

A unique feature of the BM1+ is its ability to use information from both algorithms, during the charge/discharge cycles, to continually update its performance. This means that, unlike many other systems that rely solely on amp hour integration, the NASA BM1+ never needs to be re-synchronised with the battery. The algorithm includes Peukert's equation to ensure accuracy over a wide range of load currents.

The BM1+ does all this whist consuming a meagre one and a half milliamps. It is a true battery monitor, easy to install and excellent value for money.

American Sourced Marine Parts:  
The product on this page ships worldwide from the United States by Fedex, UPS, Aramex or DHL. 
These are premium services with tracking.  Delivery to most destinations is between 6-9 business days. 
The minimum freight charge is AUD$85 (about US$57) See table below.
All prices shown are in Australian AUD$.
We sell this part by the manufacturer's part number.  These products are special order from the USA, meaning 
there are no returns, no exchanges and no refunds possible.  The sale is final.

Prices include Australian 10% GST, but may be subject to further customs fees or charges if the order is over AUD$1000. 
Shipments outside of Australia are tax free.
Any additional import fees are paid by the customer.  We will assist with customs formalities if necessary.
Manufacturer's warranty applies.  The warranty is in the box.  If a product is dead on arrival, we will replace it.   
Where possible warranty DIY spare parts will be provided.  
MarineDirect Australia will contribute $50 towards your return freight charges to the USA 
within one year of order if there is a warranty issue.
Dangerous Goods: 
Liquids, gels, pastes and replacement lithium batteries may not ship under any circumstances.
Grey Marketing & Compliance:  
Where a brand has an established distributor in 
Australia, we will decline to sell it.  
Most such brands and products have been removed 
from our American listings.     
Some items shown within this category are intended only 
for the American marketplace and 
may not be compliant with Australian Standards 
and in which case we cannot sell them to you and/or will refund you.

Express Freight Charges:  Total freight cost is based on the weigh of the package. 
The default freight charge is $85 for the first kilo.
The shipping weight kg of the item is shown 
under the Specifications tab above.
We use Fedex, UPS, DHL and Aramex Fedex which is generally a 6-9 business day service. Tracking is provided. 
Following your purchase we will calculate the freight charges based on the table below.   The default shipping rate for 1kg for any order is $85. 
If the weight is greater than 1 kilo, then the following additional amounts will be payable in arrears AUD$ and prior to shipping:
 
0-1kg $85 (This is the default rate)
>1-2kg  +$40
>2-3kg  +$65
>3-4kg  +$80
10kg    +$185
15kg    +$240
20kg    +$295
Some bulky items may be classified as oversize regardless of their weight.  Freight charges over 1 kilo will be based on the table above.