Domestic Automatic
Power Backup Systems

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 modified sine wave inverter-charger. The following gadgets work well with a modified sine wave: computers, motor-driven appliances, toasters, coffee makers, most stereos, ink jet printers, refrigerators, TV's, VCR's, many microwave ovens, etc.

Appliances that are known to have problems with the modified sine wave are 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.

Should you require a pure sine wave inverter-charger please use the Bespoke ordering option.

		Rated Continuous Power	Peak Power		Battery Capacity	Endurance (rated power /500W benchmark)	Price (inc VAT and Delivery)
Basic (600W)		600W	1200W		12 V   110 Ah	2.2 / 2.6 hrs	£255
TYPICAL USAGE:		Computer, router, lights in 4 rooms, TV, Freeview/cable box
Intermediate (1000W)		1000W	2000W		12 V 140 Ah	1.7 / 3.4 hrs	£328
TYPICAL USAGE:		Computer, router, lights in 5 rooms, TV, Freeview/cable box, fridge/freezer and washing machine
Premium (2000W)		2000W	4000W		24 V (2 x 12 V) 220 Ah (2 x 110 Ah)	2.6 / 5.3 hrs	£449
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)		3000W	6000W		24 V system voltage 440 Ah (4 x 110 Ah)	3.5 / 10.6 hrs	£761
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 kit using PayPal

Choose from

Basic Kit £255.00 GBP Intermediate Kit £328.00 GBP Premium Kit £449.00 GBP Heavy Duty Kit £761.00 GBP

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

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

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

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