6 left in stock
SVB price: €142.82
Excl. VAT, excl. shipping costs.
This is a NET-price excluding German VAT. Shipments to countries outside of the EU may be subject to import duties and taxes.
€142.82 This is a NET-price excluding German VAT. Shipments to countries outside of the EU may be subject to import duties and taxes.
Available variants:
Item no.
NASA-Clipper Battery Monitor BM-1 / black

Product details

The BM-1 is designed to monitor performance of 12 volt battery systems 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 installation. The unit continuously monitors voltage, current (charge or discharge), the battery‘s state of charge and the time to charge or discharge. This information leads to more efficient use of the battery, which can enhance the battery life and reduce the risk of failure.

Dimension: 110 x 110 x 27mm / compact version: 110 x 110 x 27 mm. Supply voltage: 8 - 16 Volts DC


  • supply voltage: 8 - 16 volts DC
  • supply current: 3 milliamps
  • battery capacities: 5 - 600 Amp Hour
  • load current: 100 Amps maximum
  • charge current: 100 Amps maximum
  • shunt: standard 50 millivolt / 100 amp
  • displayed starter battery voltage


en-flag Manual
PDF, 177,05 KB
fr-flag Manual
PDF, 400,16 KB
de-flag Short manual
PDF, 756,63 KB

What other SVB customers have to say

100% real reviews

11 customer reviews

4.3 (out of 11 ratings)
3 Stars
1 Stars
Jaakko P.
by Jaakko P. Flag of Finland 6/8/2015 Verified purchase
Quick delivery to my desk.Straight forward installation. Now the instruments tells exactly what is going on with my batteries. I have two set of batteries and one at the time is used for all use including starter. That schema should be added in the instructions.
Alain P.
by Alain P. Flag of Switzerland 10/4/2018 Verified purchase
Contrôle Batterie
Great product to know in real time the charge of the battery!
Jean François B.
by Jean François B. Flag of France 4/13/2015 Verified purchase
Excellent .... Superior to Victron
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Technical question

User image of Jesper  B.
Jesper B. asked
on Oct 17, 2018
Flag of English Can I extend the wiring? It’s 5 meters and need a few extra meter. If yes: witch size of cable and will it defect the monitor?
User image of Try W.
Try W. answered
on Oct 29, 2018
Hi Jesper, I would like to answer your question with "maybe" because I've never tried to prolong the harness but I imagine that it would be possible. There is only low current on the wires and for prolonging the harness I would take 1 or 1,5 mm² cable cross section. But first let's have a look on how shunt and display are working: Current flowing through the shunt creates a very small voltage drop there, which is proportional to the current height. This very small voltage is led via 2 wires to the display and there it is used for current measurement. If these two wires would be very long, there would be two risks. 1. A voltage drop but with 1 or 1,5 mm² wires that shouldn't be a problem. 2: Interference signals could be induced into the long measuring wires and lead to false display values. Some manufacturers minimize the risk of interfering signals by recommending the use of twisted pair wires. In the wiring diagram you will see at the shunt three: yellow, white and black. The black one is MINUS for the display, yellow and white are the two measuring wires. read the manual careful! There is a note which says: Black and white wires may only be combined at the battery-connection-side of the shunt and nowhere else. My advice: keep distance between the measuring wires and other cables or electrical stuff like powerful motors, pumps, etc.. I'm looking forward for your success report. Good Luck!