Data Center UPS Architecture

A server room loses money the moment power drops. Below are the questions data center and facility engineers ask most often, and every figure is taken from High Idea Power’s published product specifications.

Q1. How do I choose the right UPS architecture for a server room?

Match the architecture to the size of the protected load. For one rack or an edge cabinet, a rack-mount online double-conversion Lithium Battery UPS in the 1–3 kVA class (ET1K: 1000 VA / 800 W; ET3K: 3000 VA / 2400 W) is usually sufficient. For a whole equipment room, High Idea Power provides three-phase rack units from 10 kVA to 40 kVA (380/400/415 V input, 192–240 V DC bus, 0 ms transfer, 92–98% efficiency), the 33ETPRO series from 30 kVA to 60 kVA (192 V DC, inverter-to-bypass transfer under 4 ms, 95.5% efficiency), and modular MAX systems that scale from 30 kVA modules up to 300 kVA / 600 kW.

Q2. How do I size UPS capacity so the load never overloads it?

Add the nameplate ratings of every device you intend to protect, then keep the total within about 70–80% of the UPS capacity. The ET series is rated at 0.8 output power factor and handles a 3:1 crest factor, so blade servers and switching power supplies start without tripping the unit. Overload behaviour is specified rather than assumed: 130% for at least 20 s on mains, and 120% for at least 20 s on battery before the system transfers to bypass in less than 4 ms.

Q3. Rack-mount, tower or modular?

Rack-mount is the default for server rooms: the 19-inch ET1K/ET3K rack models measure 432 × 88 × 300 mm (2U), the 1U E-series lithium model fits a 44 mm-high, 436 mm-wide chassis, and the 33ETPRO occupies 797 × 438 × 176 mm. Tower models suit telecom closets and edge sites where no rack exists. Where the load will grow, the modular MAX approach lets you add 30 kVA modules instead of replacing the entire system.

Q4. How long will the batteries actually run my load?

Measured runtime: the ET1K supplies 600 W for 35 minutes, the ET3K supplies 2000 W for 30 minutes, and the 1U E1KS-36 supplies 600 W for 35 minutes. Runtime is extended with LD48V lithium battery packs (48 V, 10/20/30/50 Ah, 57 V charging voltage, 40 V cut-off). PRO versions include a 5 A charger and support series or parallel connection, so both battery voltage and capacity can be raised to match larger units.

Q5. How long do lithium batteries last?

LD48V packs use LiFePO4 cells in a 16S configuration, designed for more than 10 years of float service and 1600 charge/discharge cycles. High Idea Power states that this Lithium Battery UPS chemistry reduces volume by roughly 30% and delivers more than five times the discharge cycles of conventional batteries. Heat shortens life, so keep the battery area at 15–25 °C and recharge an idle system every three months.

Q6. When should I use an Inverter instead of a UPS?

Choose an Inverter when the critical load already sits on a DC bus, such as a 48 V telecom or DC-powered rack, and you need clean single-phase AC. The HTB rack series covers 500 VA to 12 kVA with 24/36/48/110/220 V DC input and 110/120/220/230/240 V AC output, transfer under 4 ms, efficiency above 85%, and 101–125% overload for 10 minutes on mains; models up to 6 kVA fit a 2U or 4U chassis. Keep a UPS where the load is AC and the interruption must be zero.

Q7. What installation conditions and maintenance does the room need?

Install in a clean, ventilated, dust-free room. The ET series is rated 0–40 °C and up to 1000 m altitude without derating (1% derating per additional 100 m), the 1U E-series rack units are specified from -33 °C to +45 °C, and DC inverter equipment is rated 0–40 °C. Allow at least 800 mm cabinet depth for the 600 mm PRO battery packs and follow the specified cable gauges. For maintenance, inspect input and output terminals and fan operation every six months, and periodically simulate a mains failure to confirm transfer to battery. Monitoring is standard: RS232 plus a smart slot for RS485, dry-contact and SNMP cards. The AS400 dry-contact card reports inverter fault, low battery, mains failure and bypass, while panel fault codes such as 11 (over-temperature) and 15 (fan failure) flag thermal issues early. Every unit carries a two-year warranty.

Need a specific configuration? High Idea Power supplies UPS, Inverter, telecom inverter, energy-storage and lithium battery systems as one-stop power solutions — send us your load list and rack layout and we will size the system for you.