Power Supply Systems
New Energy — 6 kW PV Base-Station Solution
ZTT's low-carbon PV base-station solution combines six 540/550 Wp monocrystalline PV modules on an aluminium-alloy bracket, an intelligent PDU / power supply with PV rectifier module, and two 48 V 100 Ah Li-ion battery packs. Field data from the Xidaguo site (August vs September 2022, ambient 19 – 34 °C) records a drop in average daily electricity cost from CNY 27.24 to CNY 1.88 — CNY 25.36 per day saved — and site power consumption reduced by 22 % (PUE from 1.4 to 1.09). Designed service life 25 years; average annual generation ≈ 6600 kWh; ROI ≈ 5.5 years.
Features & Characteristics
- ▪Designed service life: 25 years.
- ▪PV module peak power: 540 – 550 Wp monocrystalline silicon, 6 modules per site.
- ▪Average annual power generation: ≈ 6600 kWh (3.24 kW × 3.72 h × 365 d).
- ▪Annual site earnings: ≈ US$820; construction cost ≈ US$4,600; ROI ≈ 5.5 years.
- ▪Emission reduction: 59.18 t CO₂ over 25 y (≈ 2.36 t / y).
- ▪Two mounting inclinations: 41° street-side, 31° flat roof.
- ▪PV rectifier module can replace ordinary rectifier modules — no extra cabling.
Applications
- ▪Off-grid and hybrid telecom base stations targeting PUE reduction and diesel replacement.
- ▪Rooftop, street-side and pole PV retrofits for existing macro sites.
- ▪Sites eligible for peak-shaving tariffs where PV offsets peak-load consumption.
Technical specifications
- PV module
- Monocrystalline silicon, 540 / 550 Wp × 6 pcs
- Mounting bracket
- Aluminium alloy, 1 set
- Intelligent PDU
- Power supply with PV rectifier module, 1 set
- Lithium battery
- 48 V / 100 Ah × 2 packs
- PUE
- Reduced from 1.4 to 1.09
- Site power consumption
- -22 %
- Effective sunshine (reference)
- 3.72 h / day
Measured data — Xidaguo site, BEFORE PV system (2022-08-10 → 08-16)
| Date | Low °C | High °C | Inlet °C | Total kWh | Peak kWh | Low kWh | Peak cost (CNY) | Low cost (CNY) | Total (CNY) |
|---|---|---|---|---|---|---|---|---|---|
| 8-10 | 20 | 25 | 23 | 14.94 | 11.95 | 2.99 | 10.19 | 1.26 | 11.45 |
| 8-11 | 22 | 31 | 26 | 22.11 | 17.69 | 4.42 | 15.09 | 1.87 | 16.96 |
| 8-12 | 25 | 31 | 28 | 45.60 | 36.48 | 9.12 | 31.12 | 3.86 | 34.98 |
| 8-13 | 24 | 30 | 27 | 46.10 | 36.88 | 9.22 | 31.46 | 3.90 | 35.36 |
| 8-14 | 26 | 34 | 30 | 44.50 | 34.88 | 9.62 | 29.75 | 4.07 | 33.82 |
| 8-15 | 23 | 34 | 28 | 36.70 | 37.36 | 9.34 | 31.87 | 3.95 | 35.82 |
| 8-16 | 23 | 30 | 26 | 29.04 | 23.23 | 5.81 | 19.82 | 2.46 | 22.28 |
| Average | 23.28 | 30.71 | 26.86 | 34.14 | 28.35 | 7.22 | 24.18 | 3.05 | 27.24 |
Measured data — Xidaguo site, AFTER PV system (2022-09-10 → 09-16)
| Date | Low °C | High °C | Inlet °C | Total kWh | Peak kWh | Low kWh | PV kWh | Peak cost (CNY) | Low cost (CNY) | Total (CNY) |
|---|---|---|---|---|---|---|---|---|---|---|
| 9-10 | 18 | 27 | 23 | 13.96 | 1.52 | 1.42 | 11.02 | 1.30 | 0.60 | 1.90 |
| 9-11 | 19 | 28 | 24 | 14.92 | 1.28 | 1.24 | 12.40 | 1.09 | 0.52 | 1.61 |
| 9-12 | 20 | 31 | 26 | 15.25 | 1.40 | 1.25 | 12.60 | 1.19 | 0.53 | 1.72 |
| 9-13 | 19 | 30 | 25 | 15.34 | 1.28 | 1.26 | 12.80 | 1.09 | 0.53 | 1.62 |
| 9-14 | 20 | 29 | 25 | 15.08 | 1.98 | 1.21 | 11.89 | 1.69 | 0.51 | 2.20 |
| 9-15 | 19 | 29 | 24 | 14.45 | 1.85 | 1.80 | 10.80 | 1.58 | 0.76 | 2.34 |
| 9-16 | 20 | 30 | 25 | 13.08 | 1.24 | 1.64 | 10.20 | 1.06 | 0.69 | 1.75 |
| Average | 19.29 | 29.14 | 24.57 | 14.58 | 1.51 | 1.40 | 11.67 | 1.29 | 0.59 | 1.88 |
Electricity cost comparison (daily average, CNY)
| Period | Peak | Low | Total |
|---|---|---|---|
| Before PV system | 24.18 | 3.05 | 27.24 |
| After PV system | 1.29 | 0.59 | 1.88 |
| Daily savings | — | — | 25.36 |
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