Installing an on-line UPS and homelab clean-up

My homelab’s state before clean up

This was the state of my homelab. Whenever I go at my server room and attempt to arrange things, I get paralyzed how to get started.

Primary blocking reason is how I should handle supplying power. Currently I have 2 separate line-interactive UPS. One for critical internet-related devices, the other for optional servers.

My original plan was to make a DIY UPS using devices for solar. I “thought” it was cheaper. I planned to use:

  • ATS (automatic transfer switch) if I have to have a maintenance, servers will keep running
  • SNAT 1kw inverter – act like a line-interactive UPS
  • Used LifePO4 battery
  • Rack DIN rail for safety devices – ATS, breakers, DIN power plug

I already bought the components but assembling everything was daunting. I had a safety concern mixing high-voltage devices to the same rack as the server. The rack DIN rails would also have exposed live wires and I wasn’t comfortable with the plan. I purchased before I thought through the plan.

I was in a limbo on how to proceed. My homelab has been in this state for more than a year.

Finding a reasonably-priced On-line UPS

I finally found a reasonably priced online UPS. It’s on-line meaning it has double conversion 230v AC -> 24v DC -> 230v AC. Any power fluctuation won’t reach the devices.

It’s KSTAR YDC9101S RT. It’s only 900w as I don’t intend to run anything more than that. It has a user replaceable battery. It can be replaced while plugged-in. And it can be rack-mounted!

Cost is 10k, including shipping. This is cheap as compared to other on-line UPS I checked. Second-hand UPS without battery is easily around 20k. So I bit the bullet and purchased it.

A proper UPS, finally.

Plan of action

I knew I’ll rabbit-hole to something else when I start working on my homelab. There’s always something else to do. What I did was list what I wanted to accomplish for the day and limit myself to 2 hours.

  1. Remove 2 line-interactive UPS
  2. Remove shoe rack
  3. Remove TP-Link 16-port Swtich
  4. Install KSTAR UPS
  5. Install 10GBe Netgear Switch
  6. Install rack drawer

With a clear plan of action, I started.

Removing deprecated stuff

  • Shoe rack – I used this as a poor man’s rack. It become unmanageable quickly
  • 16-port TP Link switch – turns out I don’t use more than 8 ports anymore. With a new 10Gbe switch, it’s more than enough
  • 2 extension cord
  • 2 UPS with modified batteries

Installing new stuff

After clean up
  • KStar On-line UPS (bottom)
  • Netgear 10Gbe Switch
  • Rack sliding cabinet – I felt like I needed this to put loose items such as USB keyboard and mouse, extra SFP modules, rack screws. I had instances where I spent an afternoon looking for those.

Finished everything in 2 hours. Listing out what I want to accomplish was handy. It keep me on-track. I feel good about the progress I made with my homelab.

2020 © Jerico Aragon