Top 10 Features to Look for in UPS Systems

Keeping the power on matters more than most people realise, whether it’s at home or in the workplace. We depend on technology for so much these days, so having a solid Uninterruptible Power Supply (UPS) in place can make all the difference. A good UPS will keep your kit running during a power cut and protect it from spikes, dips, and other electrical gremlins.

In this guide to the top 10 UPS features, we’ll cut through the noise and give you the key facts you need to pick the right system. Whether you’re a tech enthusiast or running a business where downtime isn’t an option, knowing what to look for will help you get a UPS that does exactly what you need.

Let’s start with one of the basics: power capacity.

Illustrated UPS with a green tint

1. Power Capacity

Understanding VA Rating

When you’re choosing a UPS, one of the first specs you’ll come across is the VA (Volt-Ampere) rating. This is the measure of the apparent power the UPS can handle and tells you how much kit it can run. It’s calculated by combining voltage and current into a single number, making it easier to see the total load it can cope with.

Why VA matters: It’s the starting point for working out how much equipment you can connect without overloading the UPS.
VA vs Watts: Watts measure the actual usable power. On purely resistive loads, 1 VA equals 1 Watt, but for many electronics, the VA rating will be higher because of the way they draw power.

Get your head around VA ratings and you’ll be in a much better place to choose a UPS that won’t let you down.

Matching Power Needs

Once you know what VA means, the next step is to work out exactly what your setup needs.

Add it up – List every device you’ll connect and add their VA requirements together. This might include PCs, monitors, networking gear, and anything else you want to protect.
Think ahead – If you plan to add more equipment later, go for a UPS with a higher VA rating now so you’re not upgrading again in six months.
Check the power factor – Some devices don’t convert all the electricity they draw into usable power. If the power factor is less than 1, you’ll need extra VA capacity to cover it.
Look at the manufacturer’s specs – Always check their recommended capacity for the kit you’re running.

Match your UPS capacity to your needs and you’ll have a system that’s reliable, efficient, and ready for growth. It’ll protect your equipment, keep things running smoothly, and make sure you’re getting the most from your investment.

2. Battery Runtime

Battery runtime is one of the biggest factors when choosing a UPS, because it decides how long your equipment will keep running during a power cut. It’s not just about the headline number on the spec sheet, but how it performs in real use.

Typical Runtime Expectations

Different devices and setups draw different amounts of power, so runtimes vary. As a rough guide:

Smartphones – Around 12 to 24 hours of active use. Heavy gaming or streaming will drain it much faster, while lighter use like messaging or emails will stretch it out.
Laptops – Around 8 to 15 hours for a mid-range model. Intensive tasks such as video editing or gaming can cut that down sharply.
Tablets – Usually 10 to 20 hours, thanks to more efficient operating systems.
Wearables – Smartwatches and fitness trackers can last anywhere from a day to several days, depending on features and usage.

Knowing these averages makes it easier to judge if the runtime of a UPS will match what you need it to do.

Impact of Battery Type

The type of battery inside your UPS has a big effect on how it performs, how long it lasts, and how much maintenance it needs.

Valve-Regulated Lead Acid (VRLA) – The most common type used in UPS systems. Reliable, affordable, and capable of delivering high power when needed. They do need replacing every few years and are heavier than other options.
Lithium-Ion (Li-ion) – Lighter and longer-lasting than lead acid, with higher energy density and better charge retention. Usually found in higher-end or more compact UPS models, but at a higher cost.
Lithium Polymer (LiPo) – Similar benefits to Li-ion but in a more flexible, lightweight package, often used where size and shape matter.
Nickel-Metal Hydride (NiMH) – Older technology that’s durable and safe, but offers shorter runtimes and less efficiency than lithium or lead acid.
Solid-State – Still emerging but offers big potential for improved safety, energy density, and lifespan. Not yet common in UPS systems.

Lead acid is still the go-to choice for most UPS applications, but lithium-based batteries are becoming more popular where weight, size, or lifespan are a priority.

If you factor in both expected runtime and battery type, you’ll have a better idea of how your UPS will actually perform when you need it most. That means fewer surprises and more confidence that your kit will stay running when the power goes out.

3. Input and Output Connections

The connections on a UPS decide what you can plug in and how easy it is to use. Get this wrong and you’ll either run out of sockets or end up juggling adapters.

Number and Type of Outlets

Think about what you actually need to power and protect.

Standard AC outlets – The bread and butter for most UPS setups, letting you plug in PCs, monitors, networking gear, and other mains-powered devices.
Surge-only outlets – Found on some models. They protect from spikes but don’t provide battery backup, so you can reserve battery power for more critical kit.
USB charging ports – Handy for phones, tablets, and other small devices without tying up an AC outlet.
Data and network ports – Some UPS units offer Ethernet or phone line protection to stop surges coming in through your network.
Adaptable connections – USB-C is becoming more common for charging and data transfer, so it’s worth checking if your UPS supports it.

If your setup changes regularly or you add new devices often, go for a UPS with a mix of outlet types and enough capacity to avoid constant re-plugging.

Portability Considerations

In the UPS world, portability isn’t about throwing it in a backpack; it’s about how easy it is to move, install, or reposition when needed.

Rack vs tower – Rack-mounted UPS systems are designed to stay put in server racks, while tower units are more flexible and can be moved between locations if needed.
Weight and size – Even a “small” UPS can be surprisingly heavy, especially if it’s lead acid-based. If you’ll be shifting it around, check the weight and whether it has handles or mounting options.
Cable management – Integrated or well-placed ports and cable guides make it easier to connect and disconnect without creating a tangled mess, especially if you move it during maintenance or upgrades.
Durability – If a UPS will be moved around or installed in different environments, go for a build that can take knocks without damaging the casing or connectors.

This way, you’re choosing a UPS that not only has the right number of connections but is also practical to position and manage as your setup changes.

4. Form Factor

UPS systems mainly come in two designs: tower and rack-mounted. The choice is not just about appearance. It affects how much space you need, how easy the unit is to maintain, and how well it fits into your current setup.

Tower UPS

A tower UPS stands upright, similar in shape to a desktop PC.

Easy setup – Simple to install with no special mounting required.
Flexible placement – Can be positioned under desks, beside other equipment, or tucked away in a corner.
Expansion potential – Some models allow extra battery packs to be connected, extending runtime without replacing the whole UPS.
Quieter operation – Often produces less fan noise than rack-mounted units, which is better for offices or customer-facing areas.

Best for: Smaller offices, retail spaces, or any environment where a full rack setup is not available.

Rack-mounted UPS

Built to slide into a standard 19" rack or cabinet, these are common in data centres, comms rooms, and any well-organised IT setup.

Space efficiency – Maximises vertical space by keeping everything neatly in one cabinet.
Better airflow – Designed to work with the cooling systems in IT racks, which can improve performance and battery life.
Centralised cabling – Keeps power connections tidy and makes it easier to connect multiple pieces of equipment.
Easier monitoring – Everything is in one place, so it is quicker to check status displays or make changes.

Best for: Larger IT environments or anywhere with multiple servers and networking devices in one location.

Space Considerations

When deciding between tower and rack-mounted UPS systems, think about:

Room size – Towers are fine for open floor space, while racks are better when space is tight but you have height to work with.
Future growth – If you expect to add more servers, storage, or networking gear, racks give you more structured expansion.
Accessibility – Rack-mounted units make upgrades and maintenance simpler if you have the infrastructure for them.
Dual-use models – Some UPS systems can be configured as either a tower or rack, giving flexibility if your setup changes later.

Bottom line: Choose a UPS form factor that works for your current space and your future plans. The right decision now will save you headaches and unnecessary costs later.

5. Surge Protection

Power surges can come from anywhere. Lightning strikes, faulty wiring, sudden changes in the mains supply or even switching on large appliances can all send a spike of voltage through your system. It only takes one surge to damage equipment, corrupt data, or cause expensive downtime.

A good UPS will often include built-in surge protection, but it is worth knowing how it works and why it matters. Surge protectors act as a barrier, diverting excess voltage away from your devices so it cannot reach sensitive components.

Key benefits of surge protection:

Prevents damage – Stops high voltage from frying internal components.
Protects data – Reduces the risk of file corruption or data loss caused by sudden power spikes.
Improves safety – Lowers the chance of electrical fires and other hazards linked to surges.

Surge protection is not just a nice extra. For most setups, it is essential.

Avoiding Equipment Damage

Not all surge protectors are created equal. If you want proper protection, you need to choose the right type for your setup.

Feature	What to Look For
Joule rating	Higher ratings mean the protector can absorb more energy before failing.
Number of outlets	Enough to cover all your critical devices without overloading.
Response time	The faster it reacts, the less chance a surge reaches your equipment.
Warranty and insurance	Some protectors include cover for connected equipment.

For critical devices such as servers, network switches, or point-of-sale systems, always use a UPS with integrated surge protection. For complete coverage, you can install a whole-house surge protector at the main power line to stop spikes before they even reach your UPS.

Taking surge protection seriously will extend the life of your equipment, reduce the risk of failures, and keep your systems running safely.

6. Smart Features

Modern UPS systems are far more than just a box with batteries. Many now include smart features that make them easier to monitor, control, and integrate into your wider IT setup. Two of the most useful are LCD displays and management software.

LCD Displays and Monitoring

A good LCD display on a UPS can save you a lot of guesswork.

Clear information – Shows vital stats like load level, battery charge, estimated runtime, and any active alarms.
Real-time updates – Lets you see what is happening instantly, whether the mains is healthy, the battery is discharging, or the system is bypassed.
Ease of use – Many modern displays have simple menus for changing settings without needing to connect a laptop.

On-site staff can quickly check the UPS status at a glance, which is a big help during faults or maintenance.

Smart Management Software

Management software takes UPS monitoring to the next level. When installed on a connected computer or server, it can:

Send alerts – Email or network notifications if there is a power issue or the UPS needs attention.
Automate shutdowns – Safely power down servers during a prolonged outage to prevent data loss or corruption.
Track performance – Log events, runtimes, and battery health over time so you can spot problems early.
Remote access – Manage and monitor the UPS from anywhere on your network, which is essential for multi-site or unmanned locations.

Some higher-end UPS systems even offer cloud-based monitoring so you can get updates on your phone or via a web portal.

Smart features are not just nice extras. They give you visibility, control, and the ability to act before a power problem becomes a bigger issue. If you are comparing UPS models, look closely at what management features are included and how easy they are to use.

7. Battery Management System

The batteries are the most critical part of any UPS. Without them, the unit cannot deliver backup power, no matter how advanced the electronics are. A Battery Management System (BMS) is built into many UPS models to keep the batteries in good condition, optimise charging, and warn you before problems turn into downtime.

Monitoring Battery Health

A good BMS constantly tracks key parameters such as:

Voltage – Ensures each battery string is operating within safe limits.
Temperature – Prevents overheating, which is one of the quickest ways to shorten battery life.
State of charge – Shows how much capacity is available at any given time.
Cycle count – Monitors how many charge and discharge cycles the battery has been through, which helps predict remaining lifespan.

With this information, the UPS can generate:

Real-time status updates – Available on the UPS display or via monitoring software.
Health reports – Showing gradual performance decline so you can schedule replacements before the batteries fail under load.
Alarms and alerts – Triggered if the batteries are not charging correctly, are too hot, or have developed faults.

Automatic Charging and Maintenance

Battery charging is not simply a case of topping them up. The BMS manages the process to extend service life:

Optimised charging profiles – Adjusts voltage and current depending on battery type (VRLA, lithium-ion, etc.) and temperature.
Float and boost modes – Keeps batteries at the right level when idle and can quickly top up charge when needed.
Self-testing – Many UPS systems run automatic tests weekly or monthly to check that batteries can still hold a charge under load.
Equalisation charging – In some designs, the BMS balances the charge between batteries in a string so one weak battery does not pull the whole set down.

Why it Matters

Batteries are often the most expensive part of a UPS to replace and are also the most likely component to fail over time. A good BMS can:

Extend battery life by reducing stress during charging.
Prevent unexpected failures by spotting problems early.
Reduce emergency call-outs by allowing planned maintenance.
Keep the UPS operating at full capacity when you actually need it.

If you are buying a UPS, look for detailed battery management features in the specifications. They can make a major difference to reliability and running costs over the life of the system.

8. Noise Level

UPS systems are not silent. Most use cooling fans that adjust speed based on load and temperature, and some can be surprisingly loud if you are not prepared for it. In a comms room or data centre this is not usually a problem, but in an office or customer-facing space, fan noise can quickly become irritating.

Operating Quietly

Noise levels vary by UPS design, size, and where it is installed. Smaller line-interactive models often run quietly until the fan kicks in during charging or heavy load. Larger online UPS systems may have fans running all the time to keep internal components cool.

If keeping noise down is a priority:

Check the manufacturer’s specs – Look for models with low dB ratings at typical load levels.
Choose the right location – Place the UPS in a separate room, cupboard, or under-desk enclosure with ventilation to keep the sound away from people.
Avoid overloading – A UPS running near maximum load will produce more heat, which means more fan noise.

Why Noise Matters in Office Environments

In quiet workspaces, a noisy UPS can be a constant distraction. High background noise makes it harder to concentrate, can interrupt calls, and generally lowers comfort levels.

Keeping noise under control can:

Improve focus – Less background hum means more attention on the job.
Make conversations easier – Important for offices, reception areas, and meeting rooms.
Reduce fatigue – Constant noise can be tiring over a long day.

If you are placing a UPS somewhere people work, plan for noise just as you would plan for power and cooling. The quietest option is not always the cheapest, but the right balance will give you reliable backup power without adding unnecessary disruption.

9. Warranty and Support

A UPS is a long-term investment, and the warranty and support that come with it can make a big difference to the total cost and hassle over its lifetime. Batteries will eventually need replacing, components can fail, and sometimes issues happen at the worst possible time. Knowing exactly what is covered will save you from nasty surprises later.

Length of Warranty

UPS warranties vary a lot depending on the brand, model, and whether you are buying for home, office, or industrial use.

Standard coverage – Most UPS systems come with at least a one or two-year warranty. This usually covers manufacturing defects but often excludes the batteries, which might have their own shorter coverage.
Extended warranties – Available from many manufacturers for an extra cost. These are worth considering for higher-end units or business-critical systems, as they can include on-site repairs and battery replacement.
Battery coverage – Check this carefully. Some warranties cover the UPS electronics for years but only cover the batteries for 12 months.
Transferable warranties – If you plan to sell or hand down the UPS, a transferable warranty can add value and make resale easier.

Reading the warranty terms before you buy is the only way to know exactly what you are getting.

Customer Support Services

Good support can turn a fault from a disaster into a minor inconvenience. When comparing UPS brands, look at how they handle after-sales service.

Availability – Check if support operates during your business hours and how you can reach them (phone, email, live chat). For business-critical systems, 24/7 support can be worth paying extra for.
Knowledgeable staff – You want to speak to people who understand UPS systems, not just someone reading a script.
Self-help resources – A decent support section on the manufacturer’s website with manuals, troubleshooting guides, and firmware updates can save you time.
Customer reviews – A quick look at feedback from other buyers can tell you how a company handles problems in the real world.

A good warranty and strong support are not just about peace of mind. They protect your investment, minimise downtime, and can even save you money over the life of the UPS. Always weigh these factors alongside features and price when choosing your system.

10. Price and Value

When choosing a UPS, it is tempting to go straight for the cheapest option that meets your minimum requirements. The reality is that a slightly higher upfront spend can often save you money and hassle in the long run. Price matters, but value is about what you actually get for that price over the lifetime of the system.

Comparing Features to Cost

With so many UPS models available, the best way to compare them is to focus on what you truly need.

Identify essential features – Decide what matters most. This could be capacity, battery runtime, form factor, management software, or hot-swappable batteries.
Compare costs against benefits – A UPS with a slightly higher capacity or better battery management might cost more initially but could reduce downtime and extend lifespan.
Look at brand reputation – Established UPS brands tend to be more reliable and have better support, which can justify a higher price.

Example:

Brand	Price	Key Features	Warranty
Brand A	£499	Online double conversion, network card included	2 years
Brand B	£379	Line-interactive, basic display	1 year
Brand C	£599	Online double conversion, extended battery module support	5 years

Choosing a UPS should be a balance between budget and long-term reliability. The right model is the one that protects your equipment, fits your needs now, and will still deliver value years down the line.

Conclusion

Choosing the right UPS is not about picking the first one that looks like it will do the job. It is about understanding exactly what you need to protect, how long you need it to run for, and which features will make your life easier over the long term.

From getting the VA rating right, to knowing your battery type, to making sure it has enough outlets for your kit, each of the ten features we have covered plays a part in building a reliable backup power setup. Add in extras like good surge protection, smart monitoring, and a solid battery management system, and you are not just buying a UPS, you are investing in uptime and peace of mind.

It is also worth remembering that things like form factor, noise levels, warranty, and total value for money can make a big difference to how well your UPS works for you in day-to-day use. The cheapest option is rarely the best in the long run, and the most expensive is not always the right fit either.

At UPSBuyer, we stock a wide range of high-performance UPS systems to suit everything from small offices to critical business infrastructure. We can help you find a system that fits your exact needs, keeps your equipment safe, and ensures you are ready for anything, whether it is a short power blip or a prolonged outage.

Explore our range today and take the guesswork out of protecting your power. With the right UPS in place, you can focus on running your business and leave the power problems to us.

Frequently Asked Questions

What is an Uninterruptible Power Supply (UPS) system?

A UPS is a device that provides backup power when the mains goes off. It keeps your equipment running during outages and protects it from spikes, dips, and other electrical issues. In short, it keeps you online and your kit safe when the power is anything but stable.

What features should I look for in a UPS system?

The key ones are: capacity (VA rating), battery runtime, UPS type (standby, line-interactive, or online), number and type of outlets, surge protection, smart monitoring, battery management, form factor, noise levels, and warranty. These are exactly what we have covered in this guide, so you can choose with confidence.

Why is battery runtime so important?

Runtime decides how long your UPS can keep things running in a power cut. More runtime means more time to save work, shut down systems safely, or keep essential kit powered until mains returns.

What types of UPS systems are there?

Standby (Offline) – Kicks in when mains power fails. Good for basic protection.
Line-Interactive – Can handle small voltage fluctuations without using the battery.
Online (Double Conversion) – Supplies clean, continuous power at all times and offers the highest level of protection.

How do I know what power capacity I need?

Add up the power draw (in watts or VA) of all the equipment you want to connect, then add at least 20–30% for safety and future growth. If you are unsure, speak to us at UPSBuyer; we can help you work it out and recommend the right model.

How long do UPS batteries last?

For most systems, lead-acid batteries last around 3–5 years, while lithium-ion batteries can last 8–10 years or more. The lifespan depends on usage, temperature, and how well they are maintained. We can supply replacement batteries and advise on the best way to maximise their life.

Do I need maintenance for my UPS?

Yes. Regular maintenance keeps the UPS working at its best and reduces the risk of failure when you need it most. This can include battery health checks, firmware updates, and cleaning air intakes. UPSBuyer offers a range of support and maintenance options to suit different setups and budgets.