• Home
  • About Us
  • Contact Us
  • Useful links
  • FAQ's
Cart: 0 item (s) - £0.00

140 Amp 12 Volt Split charge relay
Voltage Sensing
ALTEC M-POWER ALT/MPOWER140VSR-07

"If CARLSBERG made split charge relays....."
ALTEC "M-POWER" 140Amp 12 volt split charge relay
VOLTAGE SENSING
Very simple to install
3 Connections to make
Power in, Power out & negative...that's it!
Available as a control unit only or as a fully assembled kit
Product Condition: New
140A Split charger Voltage Sensitive Relay
£32.95 excluding VAT


140Amp 12 volt split charge (VSR) relay
In our opinion the finest 140A VSR Split Charge unit on the market today.
Manufactured using the highest quality components and materials.

ALTEC M-Power VSR
Bi-Directional, zero loss Split Charging
Fully automatic operation
‘Connected’ LED indicator
Sealed for marine/under hood installation
Ignition Protected


Very simple to install, does not require a connection to vehicle alternator

Fully epoxy sealed unit for years of trouble free service

Only 3 Connections to make

Power in, Power out & negative...that's it!

The idea of a "voltage sensitive relay" (VSR) or "voltage controlled relay" (VCR) as they are sometimes known,  is to simplify the installation, no connection is made to the vehicles alternator .

Simply connect this relay to the towing vehicles positive battery terminal (via a fuse!) and link to the leisure battery
The relay monitors the towing vehicles battery voltage and when it reaches 13.3vdc, the relay switches on and supplies charging current to the aux. circuits.  When the engine is stopped and the voltage of the vehicles main battery drops below 12.8vdc the unit switches off.
Only 3 connections are required to the unit and as such it can be fitted in next to no time .
 Supplied with detailed full colour  instructions. (No cable is supplied with the unit unless the "kit"  is purchased)
Also available as a ready assembled kit with a 6 + 1 metre pre-assembled heavy duty wiring harness complete with twin fuses.
The kit is manufactured using 2 x midi fuse holders & 16mm2 / #6 AWG heavy duty extra flexible battery cable.


Switch on voltage 13.3vdc

Switch off voltage 12.8vdc

Dimensions:-65 x 65 x 53mm

Relay connections:- 2 x 6mm studs for power in and out. 1 x 450mm cable for negative
Related Products
Twin towing electrics 12N & 12S on standard twin "T" plate<BR>ALT/TP107-01
£13.32
Pre-wired twin sockets 7 pin 12N & 12S sockets.
7 pin 12N Pre-wired trailer electrical socket on plate   <BR> ALT/TP106-01
£5.41
7 Pin 12N Plastic trailer pre-wired electrical socket.
Double towing socket mounting plate   <BR> ALT/TP222-01
£2.12
Towing socket (double) mounting plate
Suitable for left or right hand mounting
Single towing socket mounting plate   <BR> ALT/TP100-01
£1.58
Towing socket (single) mounting plate
Suitable for left or right hand mounting
Towing electrics 13 pin caravan trailer plug  ALT/TP400-01
£4.98
13 Pin Electrical towing connector Plastic bodied Brass screw terminals
Towing electrics 13 pin caravan trailer socket   ALT/TP403-01
£5.84
13 Pin 12N Electrical towing socket
Plastic bodied
Brass screw terminals
Towing electrics 7 pin 12N caravan trailer plug  ALT/TP700-01
£1.99
7 Pin 12N Electrical towing connector Plastic bodied Brass screw terminals
12v 70Amp Split charge relay kit<BR>
£29.12
Easy installation
Fully assembled wiring harness supplied
NON-Voltage sensing 12volt system
Towing electrics 7 pin 12S caravan trailer plug  ALT/TP710-01
£1.99
7 Pin 12S Electrical towing connector plug Plastic bodied Brass screw terminals
7 pin 12S electrical towing socket  ALT/TP730-01
£2.45
7 pin 12S towing electrical socket
Caravan/trailer "VOLTAGE SENSING " VSR Split charge / fridge 12 volt KIT ALT/TF1170-3 KIT
£18.95
Easy installation
Safe Reliable Proven System Suitable for Caravans, trailers, motorhomes etc
Fully assembled wiring harness supplied
12 volt 30Amp Voltage sensing system
ALT/TF1170-3 KIT
7 pin 12N electrical towing socket     ALT/TP720-01
£2.45
7 pin 12N towing electrical socket
Split charge relay kit<BR> Available in 12volt 30A, 24 volt 20A, 24volt 40A variants
£17.62
Easy installation
Fully assembled wiring harness supplied
NON-Voltage sensing
140 Amp 12 Volt Split charge relay <br>Voltage Sensing<br> ALTEC M-POWER   ALT/MPOWER140VSR-07
£32.95
"If CARLSBERG made split charge relays....."
ALTEC "M-POWER" 140Amp 12 volt split charge relay
VOLTAGE SENSING
Very simple to install
3 Connections to make
Power in, Power out & negative...that's it!
Available as a control unit only or as a fully assembled kit
24 VOLT 100 Amp  Split charge relay  - Voltage Sensing  Relay   <br> ALT/CGO-160742-19
£59.99
100Amp 24 volt split charge relay
VOLTAGE SENSING
Very simple to install
3 Connections to make
Power in, Power out & negative...that's it!
ALTEC 140 Amp 12 Volt Split charge relay <br>Voltage Sensing<br> ALT/VSR140/12CP-15
£25.45
ALTEC 140Amp 12 volt split charge relay
VOLTAGE SENSING
Very simple to install
Also available as a fully built kit.
Voltage Sensitive Caravan Split charge & fridge relay <BR>ALT/TF1170-3-13
£10.20
Voltage Sensitive 30 Amp fridge and auxiliary battery split-charge relay for caravan/motorhome or trailer.
Voltage Sensitive Caravan Split charge & fridge relay <BR>ALT/TF1170-3-13
£10.20
Voltage Sensitive 30 Amp fridge and auxiliary battery split-charge relay for caravan/motorhome or trailer.
Caravan/trailer "VOLTAGE SENSING " VSR Split charge / fridge 12 volt KIT ALT/TF1170-3 KIT
£18.95
Easy installation
Safe Reliable Proven System Suitable for Caravans, trailers, motorhomes etc
Fully assembled wiring harness supplied
12 volt 30Amp Voltage sensing system
ALT/TF1170-3 KIT
12v 70Amp Split charge relay kit<BR>
£29.12
Easy installation
Fully assembled wiring harness supplied
NON-Voltage sensing 12volt system
Caravan Mains Conversion Cable
£3.95
Connects the 240 volt caravan electrical system to a household 13 amp socket, via standard caravan / site hookup mains lead.
Connect this adaptor to your existing site mains lead, and connect to your caravan.
•Enables connection of the caravan to household mains supply
•Ideal for pre-cooling fridge or charging leisure battery before setting off.
Split charge relay kit<BR> Available in 12volt 30A, 24 volt 20A, 24volt 40A variants
£17.62
Easy installation
Fully assembled wiring harness supplied
NON-Voltage sensing
7 Core Trailer cable (Non Coiled) Black or Grey
£1.73
7 core trailer cable
Sold by the metre (any length up to 100mtrs available)
7 x 32/0.20
7 x 1.0
16.5Amp
7.4mm o/d
Black outer sheath
Core colours:-Black Red Green Yellow Brown White Blue
CONTRALUBE 770 <br>25gm tube  <BR> ALT/CONTRA-14
£14.50
Contralube 770
dielectric power and data contact/connector gel

The ultimate "Connector Protector"
13 Core Trailer cable Black
£4.44
13 core trailer cable
Sold by the metre (any length up to 100mtrs available)
SPLIT CHARGE DIODE SPLITTERS 70A - 200A
£30.75
STERLING POWER PRO-SPLIT D Low Volt Drop Split Charge
10 models available
One alternator input & up to 3 outputs
Amperages from 70A - 200A
SPLIT CHARGE DIODE SPLITTERS 70A - 200A
£30.75
STERLING POWER PRO-SPLIT D Low Volt Drop Split Charge
10 models available
One alternator input & up to 3 outputs
Amperages from 70A - 200A
STERLING POWER  ProPower Q- Professional Quasi Inverters <BR>12volt  variants <BR>100 - 5000w
£41.83
STERLING POWER ProPower Q- Professional Quasi Inverters 12v variants 100 - 5000w
(For Pure Sine Wave Inverters See :- ProPower SINE WAVE Inverters
STERLING POWER  ProPower Q- Professional QUASI Sine Wave<BR> 24 volt  variants<BR>100 - 5000w
£41.83
STERLING POWER ProPower Q- Professional Quasi Inverters 24v variants 100 - 5000w
STERLING POWER BATTERY TO BATTERY 12V - 12V 60A CHARGER    ALT/BBW1260
£316.90
STERLING POWER BATTERY TO BATTERY CHARGER 12V - 12V
Fully supports SMART Euro 5 & Euro 6 engine technology
Charge a 12v battery from a 12v supply at up to 60Amp
FULLY WATERPROOF IP68
Ideal solution for charging an auxiliary battery on vehicles equipped with regenerative braking systems.
STERLING POWER BATTERY TO BATTERY 12V - 12V CHARGER    ALT/BBW1212
£168.75
STERLING POWER BATTERY TO BATTERY CHARGER 12V - 12V
Charge a 12v aux. battery from a 12v supply without loss of charge
Ideal for vehicles with RENGENERATIVE BRAKING SYSTEMS and/or SMART alternators etc.
Fully waterproof (IP68 rated)
STERLING POWER BATTERY TO BATTERY 24V - 12V CHARGER    ALT/BBW2412
£168.75
STERLING POWER BATTERY TO BATTERY CHARGER 24V - 12V
Charge a 12v battery from a 24v supply
Ideal for horseboxes etc.
Fully waterproof (IP68 rated)
Guaranteed Next-Day Delivery Service Available
Please contact us for full details