Sterling 12V 140A Split Charge Relay – Voltage Sensitive Relay (VSR) for Campervan & Marine Use

High-Quality 12V 140A Voltage Sensitive Relay for Dual Battery Systems

This Sterling 12V 140A Voltage Sensitive Relay (VSR) is designed to safely charge two separate battery banks from a single charging source, such as a vehicle alternator, without risking a flat starter battery.

By monitoring battery voltage, the VSR automatically connects the secondary (leisure) battery only when the primary battery is fully charged. When voltage drops, the relay disconnects, ensuring your starter battery is always protected.

With dual-sensing technology, the relay can detect charging from either battery. This allows charging from external sources such as solar panels or mains chargers, making it ideal for campervans, motorhomes, boats, and 4x4s.

The solid-state, encapsulated design offers zero voltage drop, no moving parts, and excellent reliability in demanding environments.

🔴 Product Features:

• Voltage: 12V DC

• Current Rating: 140A continuous

• Sense Type: Dual sensing (both batteries)

• Engage Voltage: 13.7V DC

• Disengage Voltage: 12.8V DC

• Stud Size: M6

• Ground Connection: Negative (0.5m / 18 AWG wire)

• Material: Encapsulated solid-state construction

• Ignition Protected: UL1107 compliant

• Approvals: CE & E-Mark approved

• Weight: 0.2kg

• Dimensions: 68mm x 68mm x 49mm

✅ Ideal For:

• Campervan & motorhome conversions

• Split charging systems

• Marine & boat battery setups

• 4x4 and off-grid vehicle builds

• Alternator, solar, or mains charging systems

⚠️ Important Notes:

• Designed for 12V systems only

• Must be correctly earthed for proper operation

• Direct alternative to Durite 140A VSR

🚚 Fast UK Dispatch – Flexible Delivery Options:

• Free Tracked Delivery via Royal Mail 48

• Upgrade to Royal Mail 24 for £1

• DPD Tracked Next Day Delivery for £3

• Same-day dispatch on orders placed before 1pm

• VAT invoice included with every purchase