Contemporary Energy can supply automatic battery backup solutions to provide continuous power to domestic equipment such as fridges, freezers, lighting, gas central heating, computers, routers, Wi-Fi, TV, etc. even when the mains power fails.

We offer off-the-shelf kits of various capacities - Basic, Intermediate, Premium and Heavy Duty. You can also build a bespoke system by choosing your own components, or if you tell us what your requirements are we can design a system that is perfect for you.

To help you choose the appropriate combination you can use the calculator below which gives typical ratings of various items in the home. Check those items you wish to run during a power outage to see the sort of power rating you should aim for. You can also estimate the endurance, the amount of back-up time you can expect from various combinations of inverter-chargers and batteries.

When the system detects a power cut it instantly switches over to the back-up supply.  Your computers will remain on with no data loss and the TV won't even flicker as the power switch-over occurs.  When you are using the battery back up as the power source, if you are able to limit the use of the higher power appliances, the time that the batteries will last will be greatly extended.  Hence we have included the 500W benchmark endurance as a comparison. 

When using a back-up supply it is not advisable to use an oven, air conditioning, an iron or electric heater as these will severely reduce the amount of time (endurance) that the back-up system can operate.

Our four main kits include a pure sine wave inverter-charger to give you maximum flexibility of use. This is because some gadgets would not work correctly with a modified sine wave inverter: some digital clocks, some battery chargers, light dimmers, some battery operated gadgets that recharge in an AC receptacle, some chargers for hand tools. (In the case of hand tools, the problem chargers usually have a warning label stating that dangerous voltages are present at the battery terminals when charging.)

If you would like advice on a more powerful UPS solution  use our CONTACT FORM and we will get back to you as soon as possible.

 

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Our Kits

  Rated
Continuous Power
Peak Power   Battery Capacity Endurance
(rated power /500W benchmark)
Price
(inc VAT and Delivery)
Basic
(1000W)
Pure sine wave inverter-charger for UPS systems 1000W 3000W 110Ah battery 12 V
110 Ah
1.7 / 3.4 hrs £548
TYPICAL USAGE: Computer, router, lights in 5 rooms, TV, Freeview/cable box, fridge/freezer and washing machine
 
Intermediate
(1500W)
Pure sine wave inverter-charger for UPS systems 1500W 3000W 2 batteries 220Ah 24 V (2 x 12 V)
220 Ah
(2 x 110 Ah)
1.8 / 4.4 hrs £624
TYPICAL USAGE: Computer, router, lights in 5 rooms, TV, Freeview/cable box, fridge/freezer and washing machine
 
Premium
(2000W)
Pure sine wave inverter-charger for UPS systems 2000W 6000W 2 batteries 220Ah 24 V (2 x 12 V)
220 Ah
(2 x 110 Ah)
1.3 / 5.3 hrs £693
TYPICAL USAGE: Computer, router, lights in 6 rooms, TV, Freeview/cable box, fridge/freezer, washing machine, and either microwave or kettle intermittently
 
Heavy Duty
(3000W)
Pure sine wave inverter-charger for UPS systems 3000W 9000W 4 batteries 440Ah 24 V system voltage
440 Ah
(4 x 110 Ah)
1.8 / 10.6 hrs £1009
TYPICAL USAGE: Computer, router, lights in 6 rooms, TV, Freeview/cable box, fridge/freezer, washing machine, and either microwave or kettle intermittently

To order a UPS kit using PayPal

Choose from here .....

Bespoke Solutions

Use this option if you wish to choose your own combination of inverter-charger and batteries.

The Inverter-Charger

Inverter-chargers are specified by their output power, output peak power, DC input voltage and the number of 3-pin sockets.

MODIFIED SINE WAVE INVERTER-CHARGERS

 

#3-pin sockets Output Power Output Peak Power DC Input Voltage       Price      
1 600W 1200W 12V £162
1 600W 1200W 24V £162
1 1000W 2000W 12V £167
1 1000W 2000W 24V £167
2 1500W 3000W 12V £204
2 1500W 3000W 24V £204
2 2000W 4000W 12V £248
2 2000W 4000W 24V £248
2 3000W 6000W 12V £344
2 3000W 6000W 24V £344

To order an MSW Inverter-Charger using PayPal

Choose from here .....

PURE SINE WAVE INVERTER-CHARGERS

#3-pin sockets Output Power Output Peak Power DC Input Voltage       Price      
1 1000W 3000W 12V £372
1 1000W 3000W 24V £372
1 1500W 4500W 12V £448
1 1500W 4500W 24V £448
1 2000W 6000W 12V £477
1 2000W 6000W 24V £477

To order a PSW Inverter-Charger using PayPal

Choose from here .....

Batteries

Batteries for uninterrupted supply systems need to be heavy duty to withstand potentially frequent charge/discharge cycles.

Choose from the following batteries:

Capacity
(Ah)
DC Voltage Description Endurance
@500W Benchmark
      Price      
88 12V lead-acid 2.1 hrs £95
110 12V lead-acid 2.6 hrs £108
125 12V lead-acid 3.0 hrs £122
140 12V lead-acid 3.4 hrs £176
190 12V lead-acid 4.6 hrs £196
225 12V lead-acid 5.4 hrs £230
2 x 110 2 x 12V lead-acid 5.3 hrs £216
Xplorer deep cycle
leisure batteries

To order one or more batteries using PayPal

Choose from here .....