Sterling Pro Combi S 12v 2500w

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£1,499.90
£1,189.99 (including 20 % tax)
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Sterling Pro Combi S 12/2500

As the middle of the range this Inverter Charger is ideal for those who are running mid size items such as microwaves or kettles, and those who are running sensitive items such as flat screen TV's and computers

2500w Pure sine wave inverter
70A (@ 12v) Battery charger
Battery charger will automatically detect and set for the battery bank size. There are 8 battery type options (e.g Gel, Wet lead acid etc) and de-sulphation capability
Dimensions: (mm) (w x h x l): 185 x 180 x 430 (1600 & 2500); 227 x 180 x 512 (3500)
Weight: 20kg (1500); 20kg (2500); 24kg (3500)
Status and Warning LED display is mounted on the main body of the unit
Remote panel (front control panel removable as remote, 10m remote cable)
Remote panel can be used to switch the unit On and Off

So what does it do?

Basically the unit is a combined inverter (converts 12v DC to 240v AC) and battery charger (that converts 240v AC to 12v DC).
When plugged into the mains the unit will use the 240v power available to power the battery charger and hence charge the batteries. The unit also has a transfer switch / Relay so that when the mains is connected, rather than using the inverter the mains power can be switched straight through to your 240v system (hence you arent drawing on the batteries).
When NOT plugged into the mains the unit wont be able to charge the batteries (because it hasnt got an external power source to draw from) but will act as an inverter to power your 240v system.
A clever feature is that the unit has a crossover function so if you are running equipment on your 240v system and for whatever reason the mains input to the charger is cut, the inverter will switch on and continue to support your 240v usage quick enough that your equipment will be unaffected (less than 20 milliseconds)

What is the difference between Quasi and Pure Sine

A pure sine-wave AC output is exactly the same as comes out of the socket in your wall at home. A Quasi sine-wave is an approximation of a pure sine wave, instead of being a smooth wave it is a series of steps that approximate a smooth wave.

When would I need Quasi or Pure?

A Quasi sine wave inverter will run most generic equipment such as phone chargers, Hair dryers, Microwaves, Kettles, Fridges etc (obviously the inverter needs to be an appropriate size to run the desired piece of equipment). However, more technical equipment normally needs a Pure sine wave to run sensitive circuitry or motors, some specific examples are computers, washing machines and flat screen TV's (again the inverter needs to be appropriately sized to run the desired piece of equipment).

Detailed Specification and Dimensions

For the full specification of the range please see the table below

General specification
	ProCombiQ	ProCombiS
Input wave form	Sinusoidal	Pure sine wave
Nominal voltage	Input 230 v a/c	Input 230 v
Low voltage trip	184v+/- 4%	a/c 184v+/- 4%
Minimum engage	voltage 194v +/- 4%	voltage 194v +/- 4%
High voltage trip	253v +/- 4%	253v +/- 4%
High voltage re engage	243v +/- 4% 270 v rms	243v +/- 4%
Max input a/c voltage	270 v rms	270 v rms
Nominal input frequency	50hz or 60hz auto detect	50hz or 60hz auto detect
Low frequency trip	7 hz for 50 hz, 58 hz for 60 hz	47 hz for 50 hz, 58 hz for 60 hz
High frequency trip	53 hz for 50 hz, 62 hz for 60 hz	53 hz for 50 hz, 62 hz for 60 hz
Output wave form	(on bypass mode) same as input	(on bypass mode) same as input
Overload protection	Circuit breaker	Circuit breaker
Short circuit protection	Circuit breaker	Circuit breaker
Transfer switch rating	30 amp	1500-2500 w = 30 amp 3500 w= 50 amp
Efficiency online transfer mode	96%+	95%+
Line transfer time	20 ms	20ms
Bypass without battery connected	yes	Yes
Max bypass current	30 amps	30 amps
Bypass overload current	35 amps: Alarm	35 amps: Alarm
Inverter specification / output
Output wave form	Modified Sine Wave/ Quasi sine wave	Pure sine wave
Output continuous power watts	1600 2500	continuous 2100 (2500 30 min), 3200 ( 3500 30 mins)
Output continuous power VA	2400 3600	3100 5000
Power factor	0.9 – 1.0	0.9 – 1.0
Nominal output voltage rms	230vac	230vac
Max voltage rms	260vac	260vac
Output voltage regulation	+/- 10% rms	+/- 10% ms
Output frequency	50hz+/-0.3hz or 60hz+/-0.3hz	50hz+/-0.3hz or 60hz+/-0.3hz
Transient response time	<150ms;0% to 100% RCD load	<150ms;0% to 100% RCD load
Nominal efficiency	>85%	>88%
Surge rating	1500model=4500va 2500model = 7200va	PQS1500 = 4500va PQS2500 = 7200va
Online current consumption at 12 v/24v	12v: 1.8a 24: 0.9a	not available until March 2008
Power saver mode current consumption	12v: 0.4a 24v: 0.2a	not available until March 2008
Short circuit protection	yes, less than 3 cycles	yes, less than 3 cycles
Inverter specification / input
Nominal input voltage	12 or 24 v depending on model	12 or 24 v depending on model
Minimum start voltage	10 v for 12 v model 20v for 24 v	10 v for 12 v model 20v for 24 v
Low battery alarm	10.5v for 12 v model 21v for 24 v	10.5v for 12 v model 21v for 24 v
Low battery trip	10 v for 12 v model 20v for 24 v	10 v for 12 v model 20v for 24 v
High voltage alarm	15.5 for 12v model 30v for 24 v	15.5 for 12v model 30v for 24 v
Power saver	Below 20 watts when enabled	Below 20 watts when enabled
Power saver	can be switched on/off on remote control	Same switched on/off on remote control
Charger mode specification
Input voltage range	196-245 v ac	196-245 v ac
Output voltage	Dependent on battery type selection	Dependent on battery type selection
Output current 12 v model	1600: 40A; 2500: 50A	1500: 40A; 2500: 70A; 3500: 100A
Output current 24 v model	1600: 20A; 2500: 25A	1500: 20A; 2500: 35A; 3500: 50A
Initial voltage for start up	0-15v for 12 v x 2 /24v	0-15v for 12 v x 2 /24v
Over charge protection shutdown	15.712v x2for24v	15.712v x2for24v