BEP 2023 Catalog BATTERY MANAGEMENT 21 DVSR: Dual Battery Charging Made Easy The Digital Voltage Sensing Relay (DVSR) provides a highly efficient but inexpensive solution for automatic charging of a second battery bank. It ensures correct charging while removing the risk of flat start batteries. When the voltage on the first bank rises sufficiently, the DVSR engages allowing the second battery bank to charge. When charging stops and voltage falls, the DVSR automatically isolates the battery banks, ensuring that engine start batteries are kept fully charged. Digital circuitry provides superior reliability and extremely low power consumption. • Safely charge two or more independent battery banks from one charge source (alternator, battery charger…) • Charges engine starting batteries before combining auxiliary bank for charging • Protects start batteries from becoming flattened by domestic loads • Isolates electronics from harmful electrical surges from starter motors • Simple to install 3-wire connection, leaves alternator wiring intact • No volt drop vs. diode isolators • Ignition protected • Surface or panel mountable Digital Technology Provides: • Multi voltage, auto selects between 12V and 24V DC operation • Digital circuits provide very low power consumption (<2mA in standby, up to 8x more efficient than analog models) and enhanced performance • Remote sensing circuitry allows optional connection from ignition switch, provides same functionality as single sense VSR and zero power consumption when engine is off • Zero stand by current draw when remote sensing circuit utilized with storage mode switch fitted (switch in open position) • Remote status LED output option Wiring diagrams indicative of installation only, for full instructions see the BEP website: Part # OEM # LxWxH in LxWxH mm Voltage Continuous Engages Disengages Cable to meet rating 710-140A 710-140A-B 2.75" x 2.75" x 2" 69 x 69 x 50 mm 12/24V 140A 13.4/26.8V DC 12.8/25.6V DC 8AWG (8mm2) The two battery banks are isolated Charging begins but batteries remain isolated Battery voltage rises to 13.4V on charging battery Automatically engages to join the two battery banks for charging The charge source is removed, battery voltages begin to fall Battery voltage falls below 12.8V, and the DVSR disengages START DVSR Operation (Shown for 12V System) DVSR Operation (shown for 12V system) Engine CSP6 NEG BUS - + Optional LED Optional Orange Optional Switch for Ignition or Storage Mode Control POS BUS + - House Batt Positive + (Tinned stud) Orange sticker (Remote LED connection point) Start Batt Positive + (Tinned stud) Black wire - (Negative) Red wire (Ignition control/Storage mode) Optional cut here and join other end for ignition or storage mode control House Battery POSITIVE + Start Battery POSITIVE + DVSR BEP Emergency Parallel Isolator BEP Start Battery Isolator Switch Panel Pro Installer Fuseholder Optional Pro Installer Fusehlder - House Battery - NAVIGATION LIGHTS ANCHOR LIGHTS CABIN LIGHTS COCKPIT LIGHT BILGE PUMP SPARE Red Loop Black Wire Fuse Start Battery BEP House Battery Isolator + +