Voltage Sensing Relay (VSR) — 12V Split Charge Relay

SPLIT CHARGE · AGM & GEL ONLY ✓ No Programming✓ 120A Continuous✓ Automatic Operation✓ Budget-Friendly Microprocessor-controlled heavy-duty relay that automatically connects batteries when the engine runs Connects your starter and leisure batteries automatically whilst the engine is running and isolates them when parked. This Victron voltage-sensing relay keeps your starting battery protected whilst delivering reliable charge to your leisure battery from standard alternators. It operates completely automatically without requiring Bluetooth, apps, or complex programming. If you need a straightforward fit-and-forget charging solution for traditional AGM or gel batteries on standard alternators, this is the ideal choice. Microprocessor-controlled — not a simple voltage switch 120A continuous current rating Automatic engagement at 13.8V, disengagement at 12.8V No programming or Bluetooth needed — set and forget Compatible with AGM, gel, and lead-acid batteries (NOT lithium) Does NOT work with smart alternators (Euro 6 engines, 2015+) 🔧 Tech Specs Shared Type : Victron Cyrix battery combiner (voltage-sensing relay) Max Current : 120A continuous Engage Voltage : 13.8V Disengage Voltage : 12.8V Voltage Trend Monitoring : Yes (microprocessor) Battery Compatibility : AGM, gel, lead-acid (NOT lithium) Smart Alternator Compatible : No Bluetooth : No Dimensions : 68 × 50 × 50mm Weight : 0.3kg Warranty : 5 years (Victron) 🔌 You Might Also Need Split Charge Cable Kit Van-specific cable kit 12V Fuse Box 6-way (SC7) or 12-way (SC6) Leisure Battery AGM or gel to suit