APC1400 2u core only (nocells)

Plenty of people are asking us about using a UPS as an inverter for use in a wind/solar/water power project they are building. We are listing these units in a minimal state so that we can sell them as cheaply as possible and also its best to start with the simplest atomic items and engineer from there forwards.

In these pictures you can see us testing the UPS when using it as an inverter. We used 2x Ritar 18AH EV series cells. We directly connected the battery negative lead to the chassis and the positive to the FET heat sinks, but it would be more normal to connect to the yellow battery connector, or cut the wires leading to this connector and splicing your DC system there. We have tried to show many shots of the internals and the rig we were testing here. We have also recorded a short video showing a quick demo: 

http://youtu.be/G0INDXEF5sk 

Anyway these are cheap, reliable and a good unit for testing and using in DIY power systems. We will list the original spec below but I recommend leaving a margin on the power drawn from the UPS in order to extend lifespan. They are not an XL UPS so I'd target running at up to 60-70% of max power nominally. Additionally the fan is mounted to blow air out of the rear. Additional fans could be sited over the FET heat sinks. As we are selling these for modification and projects we are not providing a warranty - and must stress that any electrical project should only be undertaken if the user is happy with their proficiency to safely tackle the project. The good news is the DC system is fairly low voltage. The built in charger (if used) is around 5 Amps - but most people will be using a charge system that is wind or solar. The Wide DC voltage range gives flexibility with what you are connecting, and charging the cells while still inverting.

Cold start capable - can start from battery power with no mains supply.

24VDC battery system (Acceptable range for operation 20VDC to 29VDC)
240V inverter / Pure Sine Waveform (see CRO shot)
Option to add in network cards to transmit reports and alerts

We include just the UPS in a b-grade case (heavy marks from previous use)
No Front plastic.
No Batteries.
No Leads.
No rackmout rails or ears.

If you do want other parts email us so we can help - we can quote based on what we have at the time. For battery solutions we can provide a lot of flexibility from the many types we stock. We can also build the battery bank and wiring system but charge for this.

The outputs of the UPS cannot be tied together. If you have two units working side by side they must power separate devices, you cannot link two UPS together to combine their power. They cannot be grid tied. Several past customers have used different units for different sections of their house - one for the entertainment room, one for the lighting etc - all drawing from a single battery bank. Can be used in rack (flat) orientateion, or on its side, but make sure to have adequate cooling and airflow.

The UPS are all fully tested before sending though. If there is damage in transit we will cover those problems.

24VDC 
Max Power 950 Watts 
Recommended max power usage for extended durations 600 Watts 

240V AC pure sine wave inversion 


Output Voltage Note Configurable for 220 : 230 or 240 nominal output voltage 
Output Voltage Distortion Less than 5% at full load 
Crest Factor up to 5 : 1 
Topology Line Interactive 
Waveform Type Sine wave 
Output Connections 4x IEC 320 C13 

Nominal Input Voltage 230V 
Input Frequency 50/60 Hz +/- 3 Hz (auto sensing) 
Input voltage range for main operations 160 - 286V 
Input voltage adjustable range for mains operation 151 - 302V 

LED status display with load and battery bar-graphs 
On Line : On Battery : Replace Battery : and Overload LED Indicators 

Audible Alarm 
Alarm when on battery : distinctive low battery alarm : configurable delays 
(can be disabled in software or by snipping the buzzer off) 

Surge energy rating 480 Joules 
Filtering Full time multi-pole noise filtering : 0.3% IEEE surge let-through : zero clamping response time : meets UL 1449 

Maximum Height 89.00 mm 
Maximum Width 483.00 mm 
Maximum Depth 457.00 mm 
Rack Height 2U 

Operating Environment 0 - 40 °C 
Operating Relative Humidity 0 - 95% 
Online Thermal Dissipation 171.00 BTU/hr