With all the different options of apps, software, hardware and general goodness we can run at home, our home computers and network nodes are becoming more and more critical for our everyday tasks. If you have a home lab with some apps, be in a server or just a Raspberry Pi, losing that node due to a power related “incident” can be extremely unwanted. A power outage or a sudden fluctuation can lead to data loss, hardware damage, or interruptions in connectivity. This is where redundant power supply solutions come in. Contrary to popular belief, redundant power supply doesn’t just mean having multiple power supply units (PSUs) in a system. It also includes using an uninterruptible power supply (UPS) or battery backup systems to keep devices running during power issues.
What is a Redundant Power Supply?
A redundant power supply ensures that your computer or network equipment remains powered even if one power source fails. This can be achieved in two main ways:
- Multi-PSU Setups – Systems with multiple power supply units (PSUs) that work together so that if one fails, the other takes over.
- UPS and Battery Backups – Devices that provide temporary power during outages, allowing systems to stay operational or shut down safely.
Examples of Multi-PSU and UPS Setups
Multi-PSU Setups
- High-end Workstations and Servers – Many professional and enterprise-level computers come with dual PSUs that ensure uptime in case one fails.
- Gaming Rigs and Custom Builds – Some enthusiasts use multiple PSUs for added power capacity and redundancy.
- Network Storage and Routers – Certain NAS (Network Attached Storage) systems and enterprise routers support dual power inputs for reliability.
UPS and Battery Backup Solutions
- CyberPower CP1500AVRLCD – A common choice for home users that provides automatic voltage regulation (AVR) and battery backup.
- APC Back-UPS Pro 1500VA – Protects home computers and networking equipment from outages and surges.
- Eaton 5SC1500 – A reliable UPS for small business or home use with a good balance of power backup and cost.
- Tesla Powerwall or Whole-Home Battery Solutions – For those seeking complete home power redundancy.
Why is a Redundant Power Supply a Good Idea?
A redundant power setup solves multiple problems, including:
- Prevents Data Loss – Sudden power loss can cause unsaved work to disappear or even corrupt data on storage drives.
- Avoids Hardware Damage – Power fluctuations and surges can fry delicate electronics.
- Ensures Network Uptime – A UPS keeps routers, modems, and switches running, maintaining internet connectivity during short outages.
- Keeps Smart Home Devices Functional – Security cameras, smart locks, and alarms continue operating during power failures.
Pros and Cons of Using Redundant Power
Pros:
✔ Improved Reliability – Reduces downtime and ensures a stable system.
✔ Prevents Power-Related Damage – Protects components from electrical issues.
✔ Continued Network Access – Keeps the internet running even when the grid fails.
✔ Safe Shutdown Capability – Allows systems to shut down properly to prevent data corruption.
Cons:
❌ Increased Cost – Additional PSUs and UPS devices add to the overall expense.
❌ Space Requirements – UPS units and extra PSUs take up space and may require additional management.
❌ Maintenance Needed – UPS batteries degrade over time and need periodic replacement.
❌ Limited Backup Time – UPS units only provide temporary power, typically lasting minutes to a few hours.
Conclusion
A redundant power supply setup—whether through multiple PSUs, UPS devices, or battery backups—ensures reliability for home computers and network equipment. While these solutions add cost and require some maintenance, they prevent data loss, protect hardware, and keep your internet connection stable during power issues. If you rely heavily on your home network, work from home, or store critical data on your PC or NAS, investing in a power redundancy solution is a smart choice. Whether you go for a simple UPS or a full-fledged multi-PSU setup, having backup power can make all the difference when the unexpected happens.