FAQ: Rack-Mount UPS Selection Guide
Last updated 2026-08-25
Rack-mount UPS systems are essential for data centers, server rooms, and telecom cabinets where space efficiency and front-access maintenance are critical. This guide covers High Idea Power’s E Series and ET Series rack-mount UPS with real specifications to help you choose the right model.
1. What rack-mount UPS options does High Idea Power offer?
E Series — Online Rack-Mount UPS (1–3KVA):
| Model | Capacity | DC Voltage | Battery | Dimensions (mm) |
|---|---|---|---|---|
| E1K-36 | 1000VA/800W | 36V | Built-in 36V 10AH LiFePO4 | 432×88×300 |
| E1KS-48 | 1000VA/800W | 48V | External ≥10AH LiFePO4 | 432×88×300 |
| E2KS-48 | 2000VA/1600W | 48V | External ≥20AH LiFePO4 | 432×88×440 |
| E3KS-48 | 3000VA/2400W | 48V | External ≥30AH LiFePO4 | 432×88×440 |
ET Series — Online Rack/Tower UPS (1–10KVA): ET1K through ET10KRS, with select models featuring built-in LiFePO4 batteries. The ET3K (3000VA/2400W) with built-in 48V 30AH battery provides 25 min at 2000W and 90 min at 250W.
2. What does “online double-conversion” mean for rack-mount servers?
Online double-conversion means the Inverter continuously powers connected equipment — AC mains is rectified to DC, then inverted back to pure AC. This eliminates any transfer time (0ms switchover), providing pure sine wave output at 220VAC ±3% regardless of input quality. For data centers, this prevents micro-outages that crash RAID controllers and corrupt databases.
3. ET1K vs. ET3K — which for a small server room?
- ET1K (1000VA/800W): 1–2 entry-level servers, network switch, small NAS. Built-in 36V 15AH LiFePO4 delivers ~35 minutes at 600W.
- ET3K (3000VA/2400W): 2–3 rack servers, multiple PoE switches, surveillance NVR. Built-in 48V 30AH LiFePO4 provides 25 min at 2000W, 40 min at 1700W, 70 min at 750W.
4. E Series vs. ET Series — key differences?
| Feature | E Series | ET Series |
|---|---|---|
| Primary design | Telecom base station, 19-inch rack | General-purpose server room |
| 1U compatible | Yes (E1KS-48-1U) | No (minimum 2U) |
| Interfaces | RS232 + dry contact | RS232 + intelligent slot (SNMP expandable) |
| Target | Telecom, railway, utility | IT server rooms, enterprise |
5. What battery configuration for extended runtime on ET6KRS/ET10KRS?
Both require a 192V DC battery bank — typically four LD4830 or LD4850 48V Lithium Battery packs in series. An ET10KRS at 50% load (4KW) with four LD4850 packs provides ~15–20 minutes. Doubling to eight packs extends to 35–45 minutes. Battery expansion is modular — add strings as needed.
6. Can rack-mount UPS units go beyond server rooms?
Yes. Operating range is -10°C to 40°C, humidity 20%–90%. The E series specifically targets railway signaling, utility substations, telecom base stations, and public security infrastructure — environments where front-access maintenance is mandatory.