Online Shop
Fishing Products Chandlery & Hardware Electronics & Navigation Dayboat Hire Electrical and Pumps Engines & Generators Marine TV and Audio Marine Clothing Galley, Heating & Cooling Boats & Trailers

Ask The Experts Open Day





Join us at Shepperton Marina on Saturday 19th May for super savings on many products throughout our chandlery and ask our industry experts all your questions. Dispose of your old flares with our free flare disposal. Get your lifejacket checked over ready for the summer at our RNLI Lifejacket Clinic. See all of the Lowrance and Simrad electronics in their demo trailer and on their demo boat. And much much more..


Garmin Approved Dealer




Lindon Lewis Marine are approved Garmin dealers view our extensive range of Garmin Chartplotters, Garmin Fishfinders & VHF Radios

Also available
Garmin GMR18 Radar Domes.


Yamaha Appointed Dealer




Lindon Lewis Marine are a Yamaha Appointed dealer for marine engines, spare parts and accessories. Click to view our range of Yamaha Outboards


Raymarine Approved Dealer




Lindon Lewis Marine are approved Raymarine® UK dealers view our comprehensive range of Raymarine Chartplotters, Digital Sounders and VHF Radios

Also available
Raymarine Radar, Radome products & packages.


Waeco compressor coolers




Excellent cooling performance regardless of the ambient temperature, versatile use, from the Coolmatic CR-50 to the CR-110 -view our


Volvo Penta Service Centre




Lindon Lewis Marine, an approved Volvo Penta® service centre click here for more infomation about our facilities at Shepperton Marina.



NASA Battery Monitor - BM1 - 12v
NASA Battery Monitor - BM1 - 12v
Part Number: SM523-BM1

BM-1 Battery Monitor

The BM-1 is designed to monitor performance of 12 volt lead acid battery systems with capacities of up to 650 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. This information leads to more efficient use of the battery, which can enhance battery life and reduce the risk of failure.

Specification of the NASA Battery Monitor - BM1 - 12v
-Supply voltage
-8 - 16 Volts DC
-Supply current 3 milliamps
-Battery capacities 5 - 650 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.

Price: £94.50 (Including VAT at 20%)


Quantity: