How to select UPS 

1	All our Microtek inverters have a PURE “SINE WAVE” output.
2	inverter size
	600Va, 800Va, 1400Va, 3KVa, 5.5KVa
3	230 volts x Amps = Watts.
4	check if the inverter’s surge rating meets your requirements
5	Battery Size
	100 Amp/Hr (AH), 105AH, 165AH, 200AH
6	Inverter
	600va 1 battery system (12V) (100AH to 165AH)
	800va 1 battery system (12V) (100AH to 165AH)
	1400Va 2 battery system (24V) (165AH to 200AH)
	3Kva 4 battery system (48V) (165AH to 200AH)
	5.5Kva 8 battery system (96V) (165AH to 200AH)
7	backup times will vary according to the batteries you choose
8	do not recommend using bigger batteries than stated above as the inverter will not be able to fully charge batteries not within specifications
9	(e.g. 800Va inverter with 200AH battery)
10	Using smaller batteries do not affect the inverter performance, but do affect backup time.
11	DB = Distribution Board
	MCB = Miniature Circuit Breaker switches
12	The Microtek inverters have two installation options:
	1. Mobile Installation/Connection
	2. Distribution Board (DB) Installation/Connection
	Battery Information
13	Charging
	a. Life Saving Charge
	b. Bulk Charge
	c. Absorption Charge
	d. Float / Trickle Charging Mode
14	Cleaning
	Check that all vent caps are tightly in place.
	Clean the battery top with a cloth or a brush and a solution of baking soda and water.
	When cleaning do not allow any cleaning solution, or other foreign matter to enter it.
	Rinse with water and dry with a clean cloth.
	Clean battery terminals and the inside of clamps using sandpaper. (Clean terminals will have a bright metallic shine).
	Reconnect clamps to the terminals and thinly coat them with petroleum jelly (Vaseline)
	This prevents corrosion.
	Keep the area around batteries clean and dry.
15	Battery Ratings and Their Meanings
	battery rating is the AMP-HOUR RATING
	unit of measurement for battery capacity, obtained by multiplying a current flow in amperes by the time in hours of discharge.
	Example: A battery which delivers 5 amperes for 20 hours is said to be of 100 ampere-hours or 100AH.
16	Battery Connections
	Series Connection
	Parallel Connection
17	Common Power Problems
	Power failure — Total loss of utility power: Causes electrical equipment to stop working.
	Voltage sag — Transient (short term) under-voltage: Causes flickering of lights.
	Voltage spike — Transient (short term) over-voltage i.e. spike or peak: Causes wear or acute damage to electronic equipment.
	Under-voltage (brownout) — Low line voltage for an extended period of time: Causes overheating in motors.
	Over-voltage — Increased voltage for an extended period of time: Causes light bulbs to fail.
	Line noise — Distortions superimposed on the power waveform: Causes electro magnetic interference.
	Frequency variation — Deviation from the nominal frequency (50 or 60 Hz): Causes motors to increase or decrease speed and line-driven clocks and timing devices to gain or lose time.
	Switching transient — Instantaneous undervoltage (notch) in the range of nanoseconds: May cause erratic behavior in some equipment, memory loss, data error, data loss and component stress.
	Harmonic distortion — Multiples of power frequency superimposed on the power waveform: Causes excess heating in wiring and fuses.
18	Batteries Type
	Tubular Batteries / Flat Batteries
	Half Load / Full Load Batteries
19	Square wave Inverter
	Sine wave Inverter = best for computer and other equiments
	Quasi-Sine Wave Inverter
20	Home Inverters
	a. Tubelight - 60W
	b. Fan - 70W
	c. Television - 120W
	d. Laptop - 100W
	e. CFL - 25W
	f. Modem - 50W
	1. Caculating Power Need
	2 Tube Lights
	3 Fans
	1 TV
	1 Laptop
	Total Power Need = 550W
	2. Calculating Inverters Capacity
	a. VA rating would have been same as the power need i.e. 550VA
	b. the power factor of Inverter is less than 1 hence power supplied by 550VA Inverter won't be 550W but lesser than that
	c. Assuming power factor of Inverter to be 0.7
	Required VA of Inverter X 0.7 = 550W
	Required VA of Inverter = 550/0.7 = 786 VA
	3. Calculating Battery Capacity
	The higher capacity battery you have, the more back-up hours you'll get
	Required power(in Wattage) X Required back-up hours(in Hours) = Inverter Voltage(in Voltage) X Battery Capacity (in Ampere Hours)
	550W X 3Hours = 12V X Battery Capacity
	Battery Capacity = (550 X 3)/12 = 137 Ampere Hours
21
	1. Caculating Power Need
	I selected 800 VA which delivers approximately 640 watts.
	Don’t select very high inverter than the requirement as it will consume more electricity and loss of power is also higher
	2. CHOOSING THE INVERTER
	Formula
	Watts / Power Factor = VA
	542 Watts / 0.8 Power Factor = 677 VA
	Power Factor: 0.8 for most of the UPS, incase of APC Inverters the power factor is 0.6
	3. CHOOSING INVERTER BRAND
	Luminous (widely advertised in 2004)
	Genus (OEM supplier for LG and Samsung)
	Su-Kam (From few years they are in the market, but most advertised)
	Hyundai (New, manufactured by Luminous under license from Hyundai Korea)
	Microtek (Addidas group)
	APC (New to Home Inverter).
	4. CHOOSING BATTERY SIZE
	Load/Voltage x Backup hours = Amperes
	542 Watts / 12 V x 3 hrs = 135 Ah
	I selected 130 Ah Standard Furokawa battery for my home.
	5 CHOOSING BATTERY
	Maintenance battery
	These batteries requires maintenance every month. The distilled water needs to be filled every month.
	Maintenance free battery
	This comes with flat plate collectors and maintenance free. These batteries will have a life of 4 years.
	Tubular batteries
	Here the active material (lead oxide) is encapsulated in polyester tubes to prevent ‘Shedding’. The electrode geometry facilitates ‘cyclic’ deep discharges. They are recommended for back up power for UPS and Inverters where environmental conditions are tough and high ambient temperatures are common. These are capable of long hours of backup.
	6. Prices ( 2007 )
	Inverters
	Genus / Hyundai / Sukam / Mikrotek / Luminous - 800 VA: Rs.6000.00
	Genus / Hyundai / Sukam / Mikrotek / Luminous - 1400 VA: Rs.7000.00
	APC 800 VA with AMCO maintenance free battery – Rs.12,925.00
	Batteries
	Standard Furokawa 130 AH Tubular Battery: Rs.9500.00
	Exide EL 120 AH Tubular Battery: Rs.9500.00
	7. Usefull websites
	Luminous - http://www.myluminous.com/
	Genus - http://www.genusoverseas.com/
	Sukam - http://www.su-kam.com/
	APC - http://www.apc.com/
	Exide Battery - http://www.exideindustries.com/
	Amaron Battery - http://www.amaron.in/
	Online Exide Battery shopping  http://www.bizrate.com/
	C stands for Discharge capacity of the battery. For 130Ah battery the C/20 value is 130Ah/20=6.5Ah which means it can draw 6.5 amps for 20 hours. As you said, higher the load more amperes will be drawn. I have used the Maximum Watts in my calculation. I don’t know how to link C/20 with the ’Watts / V x hrs = Ah’ formula. CAN AVOID Lighting Rating (Watts) Single bulb (60 watts) 60 Coffee Percolator 550 Single bulb (100 watts) 100 Electric Stove: Front large plate 2000 Ceiling fixture (3X60 Watts) 180 Electric Stove: Front small plate 1500 Chandelier (5x60 watts) 300 Electric stove: Back large plate 1500 Fluorescents tubes ( no ballasts) Electric Stove: Back small plate 1000 - 2 ft tube 18 Electric Oven: Bake element 1900 - 4 ft tube 36 Electric Oven: Grill element 2200 - 5 ft tube 58 Electric Oven: Warming drawer 475 - 8 ft tube 75 Electric two plate stove (hot plate) 2000 Ballasts ( in fluorescents lighting) Frying pan 1500 - 2 ft Holder 20 Geyser 3000 - 4 ft Holder 40 Kettle 2400 - 5 ft Holder 65 Microwave Oven 1300 Energy Savers Toaster (pop up) 1100 - 5W 5 Fridge / Freezer (small) 300 - 15W 15 - 20W 20 Computers 300 Air Conditioner 2500 Laser printer (average) 400 Heaters 2 bar 1000 Inkjet printer 55 Heaters 3 Bar 2000 All in one printer 100 Heaters Fan 2000 Dot Matrix Printer 100 Heaters Oil 2000 PABX 100 Network Hubs and Routers 15 Please note: 5.5Kva inverter can run certain air conditioners Fax Machine 75 Photocopier (small copier) 600 Till 50 Card machine 15 Clothes iron (600-2000W) 1000 Clothes iron elna press 1150 Geyser Bathroom 3000 HI-FI 30 watt speakers 180 Tumble dryer 3000 Radio, double cases & 2 speakers 18 Washing machine (unheated wash, spin) 1080 Radio, portable with cassette 6 Washing machine (auto, heating) 2000 Tape deck double 20 Hair Dryer 500 Satellite (DSTV) Dish and Decoder 60 Gaming (Playstation X-Box, Wii & Nintendo) TV 54cm (Estimate) 80 TV 74cm (Estimate) 150 Plasma 42" 300 LCD 27" 150 DVD Player / CD player 50 If you can find the Amps rating, use this simple calculation: Watts = Amps x Volts