A stabiliser, UPS and battery inverter solve different electrical problems. None is automatically suitable for every oxygen concentrator. Choose an arrangement using the exact model's instructions and a qualified assessment of the installation, rather than a rule based only on whether the machine is labelled 5 or 10 litres per minute.
What the terms mean
A voltage stabiliser adjusts voltage within its operating range. It does not normally store enough energy to run equipment through an outage. Surge protection is a separate function, so ask what protection a particular device actually provides.
A UPS combines power electronics and stored energy to maintain a supply for a period. Designs differ in transfer behaviour, voltage regulation, waveform and battery capacity. A domestic battery inverter also supplies alternating-current power from batteries, but its suitability depends on its specifications and installation. Product category names alone are not a compatibility check.
The WHO concentrator guidance includes power requirements and backup planning. The manufacturer's instructions for the supplied device remain the reference for the particular installation.
Give the installer the right information
Provide the concentrator model, electrical nameplate, manual and any manufacturer guidance on external power. Ask the installer to check permitted voltage and frequency, running demand, startup requirements, earthing and the condition of the socket and wiring. Identify any other equipment intended to share the backup.
Watts and volt-amperes are different ratings. Do not convert between them using a guessed power factor, or select a UPS solely by multiplying the watt label by a fixed margin. Confirm that both continuous capacity and transient performance meet the equipment requirements. A pure-sine output label alone does not answer every question about compatibility.
Specify the runtime separately
Output capacity and battery runtime are different. A system may start the concentrator successfully yet run it for less time than expected. Ask for a runtime estimate based on the actual load, usable battery capacity, conversion losses and battery condition. Include reserve and the time needed to obtain alternative oxygen or assistance.
Request an appropriate demonstration or commissioning check without interrupting the patient's prescribed supply. Establish how batteries are maintained, how low-charge warnings work and when performance should be reviewed.
Keep the installation understandable
Obtain a simple record of the approved equipment and connections. Do not add extension boards, adapters, generators or another stabiliser without checking the combined arrangement. Do not assume that a backup powering lights and fans can also support a medical compressor.
Keep the supplier's compatibility advice and installation record with the warranty. Follow the to turn the electrical setup into an outage plan that caregivers can use. Electrical redundancy and the clinical backup-oxygen plan should be considered together.