Split Charge Relays & Kits (12v & 24v)

Our VSR split charge relays, systems and kits are suitable for, and can be fitted to, all vehicles whether old or new.

Our range of intelligent, volt sensing split charge relays can be purchased on their own or as a complete kit with all parts necessary for a successful installation included.

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The VSR systems are especially useful if you're fitting a split charge system from scratch and / or your vehicle was registered after the mid to late 90's with a complicated engine management system we would definitely recommend using a voltage sensing split charge relay because they are easy to fit and require no connection, or interference to, the vehicle electrics. Simply wire the relay from your starter battery to your leisure battery. This also avoids any vehicle warranty issues.

Voltage sensing split charge relays and fitting kits are easy to fit as they only need wiring from the starter battery to the leisure battery/batteries. They are suitable for older and also modern vehicles with INTELLIGENT ALTERNATORS, CANBUS and MULTIPLEX wiring systems. With our range of volt sensing/sensitive split chargers there's no need to cut wires or take feeds from other sources (i.e. the vehicle alternator). Beware of other systems on the market that may cause electrical malfunction or invalidate the warranty on modern vehicles.

To read more about split charge relay systems and what system will best suit your needs see our Battery Split Charging FAQ's.

For the latest vans with Smart Alternators and Regenerative Braking Systems where conventional relays will not work efficiently see DC Battery Chargers.

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Smart Combination caravan split charge relay
Delivery time:Dispatched within 24 hours
Ring RCT465 Smart Combination Relay

Ring Smart Combination caravan relay

Intelligent split charging with isolated fridge supply. No alternator connection required. 12 volt - max output 22 amps.

OUT OF STOCK!

Designed to cut off power from towing vehicle to caravan battery and fridge when no charge is available. Suitable for vehicles with multiplex and canbus wiring systems. Avoids discharge of car battery when running a caravan ‘fridge and charging the leisure battery. Relay switches on at 13.5 and off at 13.2 volts and features heavy duty terminal blocks. Comes with instructions for fitting to touring caravan 12S and 13 pin systems.

Manufacturer:

Ring Automotive

Model #:

RCT465

Max amps: 22 amps
Voltage input: 12v
Voltage output: 12v
Dimensions (mm): L 44 x D 22 x H 39
Warranty 1 year
Instructions included: Yes
Installation difficulty rating: Quite easy
Cargo voltage sensing 70A split charge relay
Delivery time:Dispatched within 24 hours

Cargo voltage sensing split charge relay 70A - 12 volt

Easy to fit, compact voltage sensing split charge relay

12 volt 70 amp.

OUT OF STOCK!

Easy to fit - no alternator/trigger wire connection required. Max output 70 amps. Allows charging of auxiliary/leisure battery bank without discharging starter battery. The voltage sensitive relay will make sure the starter battery is fully charged first before switching the charge to the leisure battery. Simple to fit. Cuts in at 13.4 volts and breaks at 12.8 volts.

Manufacturer:

HC Cargo

Model #:

160876

Max amps: 70 amp
Voltage: 12V
Dimensions: 60 x 34 x 70
Warranty: 1 year
Installation difficulty rating: Easy
Instructions included:

Yes

Cargo Power-Tech voltage sensing 140A split charge relay
Delivery time:Dispatched within 24 hours
Cargo VSR 140A 12V

Cargo voltage sensing split charge relay 140A - 12 volt

Our best buy voltage sensing split charge relay!

12 volt 140 amp.

Easy to fit - no alternator/trigger wire connection required. Red LED indicator. Max output 140 amps. Allows charging of auxiliary/leisure battery bank without discharging starter battery. The voltage sensitive relay will make sure the starter battery is fully charged first before switching the charge to the leisure battery. Simple to fit. Cuts in at 13.7 volts and breaks at 12.8 volts.

Manufacturer:

HC Cargo

Model #:

161059

Max amps: 140 amp
Voltage: 12V
Dimensions: 68 x 54 x 68 (LxWxH)
Warranty: 1 year
Installation difficulty rating: Easy
Instructions included:

Yes

Durite voltage sensing 140A split charge relay
Delivery time:Dispatched within 24 hours
Durite voltage sensitive relay

Durite voltage sensing split charge relay 140A - 12 volt

Voltage sensitive split charge relay 12 volt.

Easy to fit - no alternator/trigger wire connection required. Red LED indicator. Max output 140 amps. Allows charging of auxiliary/leisure battery bank without discharging starter battery. The voltage sensitive relay will make sure the starter battery is fully charged first before switching the charge to the leisure battery. Simple to fit. Cuts in at 13.3 volts and breaks at 12.8 volts.

Manufacturer: Durite
Model #: 072733
Max amps: 140 amp
Voltage: 12V
Dimensions: 68 x 54 x 68 (LxWxH)
Warranty: 1 year
Installation difficulty rating: Easy
Instructions included:

Connections marked on back of relay

Durite voltage sensing 140A split charge relay - 24 volt
Delivery time:Dispatched within 24 hours
Durite VSR 24 volt

Durite voltage sensing split charge relay 140A - 24 volt

Voltage sensitive split charge relay 24 volt.

Easy to fit - no alternator/trigger wire connection required. Red LED indicator. Max output 140 amps. Allows charging of 24 volt auxiliary/leisure battery bank without discharging the 24 volt starter battery. The voltage sensitive relay will make sure the starter battery is fully charged first before switching the charge to the leisure battery. Simple to fit. Cuts in at 27.4 volts and breaks at 25.6 volts.

Manufacturer: Durite
Model #: 072783
Max amps: 140 amp
Voltage: 24V
Dimensions: 68 x 54 x 68 (LxWxH)
Warranty: 1 year
Installation difficulty rating: Easy
Instructions included: Yes
Power-Tech / Durite 140A split charge relay kit 2 metre
Delivery time:Dispatched within 24 hours

Voltage sensing 12V 140A split charge relay + FITTING KIT 2 METRE

Intelligent split charge relay with red LED indicator PLUS 2 METRE FITTING KIT.

Top quality 12 volt VSR kit supplied with either the Power-Tech (lowest price) 140A relay or the Durite 140A relay. Supplied as standard with 70A cables and 60A fuses. Optional upgrade to 110A cables (100A fuses) by clicking the check-box above (extra cost).

Please enter your choice in the selection box.

What's the difference between the Durite and P-Tech relays? Durite is the more established and better known brand. Both relays are more than sufficient for most typical camper, motorhome or boat 12 volt electrical appliance requirements.

Easy to fit - no alternator/trigger wire connection required. Max output 140 amps. Cuts in at around13.5 volts and breaks at 12.8 volts. Kit includes 12V 140A relay (Durite or M-Power), cable connectors, cables, fuses and fuse holders, wiring and fitting instructions + EMAIL SUPPORT! Click on more details for more specifications.

Allows charging of auxiliary/leisure battery bank without discharging starter battery. Simple to fit (only requires wiring from one battery to the other). Dimensions 68 L x 54 W x 68 H. Ideal for modern vehicles with powerful alternators and leisure batteries up to 200AH.

KITS NOW SUPPLIED WITH STANDARD BATTERY TERMINALS AND COVERS ABSOLUTELY FREE!

N.B. Any wiring/cable kits supplied by us are for typical use only. If you plan to run heavy equipment such as high power winches, inverters or amplifiers etc. upgrade the wiring accordingly. If in doubt, or if you are unsure about the fitting/suitability of this kit for your particular vehicle requirements you should contact a suitably qualified electrician first.

Manufacturer: Power-Tech / Durite
Model #: PTVSR / 072733 + 2
Max amps: 140 amp
Voltage: 12v
Dimensions: 68 x 54 x 68 (LxWxH)
Installation difficulty rating: Easy
Instructions included:

Full with diagram

Power-Tech / Durite 140A split charge relay kit 3 metre
Delivery time:Dispatched within 24 hours

Voltage sensing 12V 140A split charge relay + FITTING KIT 3 METRE

Intelligent split charge relay with red LED indicator PLUS 3 METRE FITTING KIT.

Top quality 12 volt VSR kit supplied with either the Power-Tech (lowest price) 140A relay or the Durite 140A relay. Supplied as standard with 70A cables and 60A fuses. Optional upgrade to 110A cables (100A fuses) by clicking the check-box above (extra cost).

Please enter your choice in the selection box.

What's the difference between the Durite and P-Tech relays? Durite is the more established and better known brand. Both relays are more than sufficient for most typical camper, motorhome or boat 12 volt electrical appliance requirements.

Easy to fit - no alternator/trigger wire connection required. Max output 140 amps. Cuts in at around13.5 volts and breaks at 12.8 volts. Kit includes 12V 140A relay (Durite or M-Power), cable connectors, cables, fuses and fuse holders, wiring and fitting instructions + EMAIL SUPPORT! Click on more details for more specifications.

Allows charging of auxiliary/leisure battery bank without discharging starter battery. Simple to fit (only requires wiring from one battery to the other). Dimensions 68 L x 54 W x 68 H. Ideal for modern vehicles with powerful alternators and leisure batteries up to 200AH.

KITS NOW SUPPLIED WITH STANDARD BATTERY TERMINALS AND COVERS ABSOLUTELY FREE!

N.B. Any wiring/cable kits supplied by us are for typical use only. If you plan to run heavy equipment such as high power winches, inverters or amplifiers etc. upgrade the wiring accordingly. If in doubt, or if you are unsure about the fitting/suitability of this kit for your particular vehicle requirements you should contact a suitably qualified electrician first.

Manufacturer: Power-Tech / Durite
Model #: PTVSR / 072733 + 3
Max amps: 140 amp
Voltage: 12v
Dimensions: 68 x 54 x 68 (LxWxH)
Installation difficulty rating: Easy
Instructions included:

Full with diagram

Power-Tech / Durite VSR 140A split charge relay kit 5 metre
Delivery time:Dispatched within 24 hours

Voltage sensing 12V 140A split charge relay + FITTING KIT 5 METRE

Intelligent split charge relay with red LED indicator PLUS 5 METRE FITTING KIT.

Top quality 12 volt VSR kit supplied with either the Power-Tech (lowest price) 140A relay or the Durite 140A relay. Supplied as standard with 70A cables and 60A fuses. Optional upgrade to 110A cables (100A fuses) by clicking the check-box above (extra cost).

Please enter your choice in the selection box.

What's the difference between the Durite and P-Tech relays? Durite is the more established and better known brand. Both relays are more than sufficient for most typical camper, motorhome or boat 12 volt electrical appliance requirements.

Easy to fit - no alternator/trigger wire connection required. Max output 140 amps. Cuts in at 13.3 volts and breaks at 12.8 volts. Kit includes 12V 140A relay (Durite or M-Power), cable connectors, cables, fuses and fuse holders, wiring and fitting instructions + EMAIL SUPPORT! Click on more details for more specifications.

Allows charging of auxiliary/leisure battery bank without discharging starter battery. Simple to fit (only requires wiring from one battery to the other). Dimensions 68 L x 54 W x 68 H. Ideal for modern vehicles with powerful alternators and leisure batteries up to 200AH.

KITS NOW SUPPLIED WITH STANDARD BATTERY TERMINALS AND COVERS ABSOLUTELY FREE!

N.B. Any wiring/cable kits supplied by us are for typical use only. If you plan to run heavy equipment such as high power winches, inverters or amplifiers etc. upgrade the wiring accordingly. If in doubt, or if you are unsure about the fitting/suitability of this kit for your particular vehicle requirements you should contact a suitably qualified electrician first.

Manufacturer: Power-Tech / Durite
Model #: PTVSR / 072733 + 5
Max amps: 140 amp
Voltage: 12V
Dimensions: 68 x 54 x 68 (LxWxH)
Warranty: 1 year
Installation difficulty rating: Easy
Instructions included:

Full with diagram

Durite hammer / vice-crimping tool
Delivery time:Dispatched within 24 Hours
Durite hammer / vice-crimping tool

Heavy Duty Hammer / Vice Crimping Tool

Ideal tool for crimping larger tube type cable connectors. This tool is an ideal accompaniment to make crimping connectors in the kits above a cinch!

Heavy duty crimping tool, sprung loaded punch, crimping can be achieved in vice or with hammer. Suitable for our copper tube connectors up to cable CSA from 10mm²  95mm².

Durite 072723/Lucas SRB630
Delivery time:2-3 Days
Durite/Lucas SRB630 relay

Durite 072723 / Lucas SRB630 split charge relay 70/20 amp - 12 volt

£5 OFF!

Split charge system 70/20 amps with isolated fridge supply

This 70/20 amp split charging system will split the alternator charge between the starter battery and the leisure battery - extra terminal isolates the fridge circuit separately at 20 amps.

Requires trigger / alternator connection for operation! Not suitable for more modern engines with Canbus / Multiplex wiring systems, or intelligent alternators.

Manufacturer:

Durite

Model #:

072723/SRB630

Max amps:

70 amps/20 amps (fridge supply)

Voltage input: 12v
Voltage output: 12v
Dimensions (mm): 30 x  30 x 50 (LxWxH)
Warranty 1 year
Multi-stage charging:

No

Instructions included:

Connections marked on back of relay

Installation difficulty rating:

Quite easy