Solar Charge Controllers and DC Power Systems
Delta Eltek 2U / 3U Solar Shelf Extension Kit (6.4kW / 12.8kW)
The Delta Eltek Solar Extension Shelves provide a compact and engineered solution for integrating solar PV input into new or existing Flatpack2 and Flatpack S DC power systems. Available in two configurations — a 2U shelf supporting up to 6.4kW and a 3U shelf supporting up to 12.8kW of installed PV — each is designed to house the Flatpack2 48/3200 HE Solar Converter (MPPT) modules.
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Features
- Built for Hybrid & Off-Grid Sites: Supports solar autonomous systems or hybrid setups alongside diesel or grid power, ideal for remote telecom locations.
- Expandable Power Options: Choose between 2U (up to 2 modules / 6.4kW) or 3U (up to 4 modules / 12.8kW) configurations to match your load demands.
- Integrated PV Connectivity: Includes MC4 connectors, front/rear access, and 2-pole service switches for easy, standards-compliant PV array integration.
- Hot-Pluggable Solar Chargers: Enables live installation or replacement of Flatpack2 HE solar modules without system downtime.
- Advanced MPPT & Protection: Delivers fast and reliable solar harvesting with earth fault detection, reverse polarity protection, and optional DC SPD.
- Optimised for Telecom Applications: Perfect for radio base stations, cell sites, broadband nodes, and FTTx infrastructure requiring reliable solar backup.
Specifications
Downloads
| MANUFACTURER PART NUMBER | ||
|---|---|---|
| Model | 2U Solar Extension Kit (6.4 kW) | 3U Solar Extension Kit (12.8 kW) |
| Manufacturer Part Number | CTZ00000.1358 | CTZ00000.1255 |
| POWER MODULES | ||
|---|---|---|
| Model | 2U Solar Extension Kit (6.4 kW) | 3U Solar Extension Kit (12.8 kW) |
| Flatpack2 Solar Charger (1) | Flatpack2 48/3200 HE Solar | |
| Peak efficiency | 97% | |
| Max no. of modules | Up to 2pcs | Up to 4pcs |
| Note | 1) See Flatpack2 Solar charger datasheet for details | |
| INPUT DATA (SOLAR CHARGER) | |
|---|---|
| Voltage (operating range) | 85-420Vdc |
| Voltage (MPPT range) 2) | 100-380Vdc |
| Voltage (start-up) | 150Vdc |
| Maximum current | 20.3Adc |
| Protection | Fuse, varistor for transient protection, reversed polarity, shutdown when VIN is too low, earth fault check during start-up |
| Note | 2) At nominal output voltages. MPPT will operate down to 100V, but the maximum input current limitation will de-rate maximum output power |
| PV CONNECTION PANEL | ||
|---|---|---|
| Model | 2U Solar Extension Kit (6.4 kW) | 3U Solar Extension Kit (12.8 kW) |
| Service switches for PV arrays | 2 pcs 2-pole | 4 pcs 2-pole |
| MC4 connectors | 4 pcs (2 pcs per one PV array) | 8 pcs (2 pcs per one PV array) |
| DC SPD (option) | Up to 2 pcs (Type 1+2) | Up to 4 pcs (Type 2) |
| OUTPUT DATA | ||
|---|---|---|
| Model | 2U Solar Extension Kit (6.4 kW) | 3U Solar Extension Kit (12.8 kW) |
| Voltage (default) | 53.5Vdc | |
| Voltage (adjustable range) | 42 (3) - 57.6 VDC | |
| Max power, VIN ≥ 170Vdc | 6400 W | 12800 W |
| Max current, @VOUT = 48Vdc | 133 A | 266 A |
| Protection | Overvoltage shutdown, short circuit proof, high temperature, hot plug-in inrush current limiting | |
| Note | (3) Stand-by / test operation (VOUT < 48 VDC) limited for VIN > 250 VDC | |
| ALARMS & WARNINGS | |
|---|---|
| Alarms (Red LED) | High and low temperature shutdown, Converter Failure, Overvoltage shutdown on output, Fan failure, Low voltage alarm, CAN bus failure |
| Warnings (Yellow LED) | Low input voltage, Converter in power derate mode, Remote current limit activated, Input voltage out of range, flashing at overvoltage |
| Normal (Green LED) | Input and output ok |
| ENVIRONMENT | |
|---|---|
| Operating temperature | -40 to +75 °C [-40 to +167 °F] (3) |
| Storage temperature | -40 to +85 °C [-40 to +185 °F] |
| Note | (3) Stand-by / test operation (VOUT < 48 VDC) limited for VIN > 250 VDC (4) +45 to +75 °C [+113 to +167 °F] with de-rated performance |
| MECHANICAL | ||
|---|---|---|
| Dimensions (W x D x H) (5) | 482 x 384 x 89 (2U) mm | 482 x 384 x 133 (3U) mm |
| Weight (excluding modules) | Approximately 7 kg | Approximately 10 kg |
| Note | (5) Recommended minimum cabinet depth is 400 mm [15.7 inch] | |
| DESIGN STANDARDS | |
|---|---|
| Electrical safety | EN 60950-1:2006/A2:2013, EN 62368-1:2020/A11:2020, EN 62109-1:2010/-2:2011 |
| EMC | ETSI EN 300 386 v1.3.2 EN 61000-6-1:2019, EN 61000-6-2:2019, EN 61000-6-3:2007/A1:2011/AC:2012, EN 61000-6-4:2019 |
| Environment | ETSI EN 300 019-2-1 v2.3.1:2017 (Class 1.2) ETSI EN 300 019-2-2 v2.4.1:2017 (Class 2.3) ETSI EN 300 019-2-3 v2.4.1:2015 (Class 3.2) ETSI EN 300 132-2 v2.6.1:2019 Normal operating conditions as per IEC 62040-5-3:2016 clause 4.2. Other operating conditions as per IEC 62040-5-3:2016 clause 4.3, must be advised |
| MANUFACTURER PART NUMBER | ||
|---|---|---|
| Model | 2U Solar Extension Kit (6.4 kW) | 3U Solar Extension Kit (12.8 kW) |
| Manufacturer Part Number | CTZ00000.1358 | CTZ00000.1255 |
| POWER MODULES | ||
|---|---|---|
| Model | 2U Solar Extension Kit (6.4 kW) | 3U Solar Extension Kit (12.8 kW) |
| Flatpack2 Solar Charger (1) | Flatpack2 48/3200 HE Solar | |
| Peak efficiency | 97% | |
| Max no. of modules | Up to 2pcs | Up to 4pcs |
| Note | 1) See Flatpack2 Solar charger datasheet for details | |
| INPUT DATA (SOLAR CHARGER) | |
|---|---|
| Voltage (operating range) | 85-420Vdc |
| Voltage (MPPT range) 2) | 100-380Vdc |
| Voltage (start-up) | 150Vdc |
| Maximum current | 20.3Adc |
| Protection | Fuse, varistor for transient protection, reversed polarity, shutdown when VIN is too low, earth fault check during start-up |
| Note | 2) At nominal output voltages. MPPT will operate down to 100V, but the maximum input current limitation will de-rate maximum output power |
| PV CONNECTION PANEL | ||
|---|---|---|
| Model | 2U Solar Extension Kit (6.4 kW) | 3U Solar Extension Kit (12.8 kW) |
| Service switches for PV arrays | 2 pcs 2-pole | 4 pcs 2-pole |
| MC4 connectors | 4 pcs (2 pcs per one PV array) | 8 pcs (2 pcs per one PV array) |
| DC SPD (option) | Up to 2 pcs (Type 1+2) | Up to 4 pcs (Type 2) |
| OUTPUT DATA | ||
|---|---|---|
| Model | 2U Solar Extension Kit (6.4 kW) | 3U Solar Extension Kit (12.8 kW) |
| Voltage (default) | 53.5Vdc | |
| Voltage (adjustable range) | 42 (3) - 57.6 VDC | |
| Max power, VIN ≥ 170Vdc | 6400 W | 12800 W |
| Max current, @VOUT = 48Vdc | 133 A | 266 A |
| Protection | Overvoltage shutdown, short circuit proof, high temperature, hot plug-in inrush current limiting | |
| Note | (3) Stand-by / test operation (VOUT < 48 VDC) limited for VIN > 250 VDC | |
| ALARMS & WARNINGS | |
|---|---|
| Alarms (Red LED) | High and low temperature shutdown, Converter Failure, Overvoltage shutdown on output, Fan failure, Low voltage alarm, CAN bus failure |
| Warnings (Yellow LED) | Low input voltage, Converter in power derate mode, Remote current limit activated, Input voltage out of range, flashing at overvoltage |
| Normal (Green LED) | Input and output ok |
| ENVIRONMENT | |
|---|---|
| Operating temperature | -40 to +75 °C [-40 to +167 °F] (3) |
| Storage temperature | -40 to +85 °C [-40 to +185 °F] |
| Note | (3) Stand-by / test operation (VOUT < 48 VDC) limited for VIN > 250 VDC (4) +45 to +75 °C [+113 to +167 °F] with de-rated performance |
| MECHANICAL | ||
|---|---|---|
| Dimensions (W x D x H) (5) | 482 x 384 x 89 (2U) mm | 482 x 384 x 133 (3U) mm |
| Weight (excluding modules) | Approximately 7 kg | Approximately 10 kg |
| Note | (5) Recommended minimum cabinet depth is 400 mm [15.7 inch] | |
| DESIGN STANDARDS | |
|---|---|
| Electrical safety | EN 60950-1:2006/A2:2013, EN 62368-1:2020/A11:2020, EN 62109-1:2010/-2:2011 |
| EMC | ETSI EN 300 386 v1.3.2 EN 61000-6-1:2019, EN 61000-6-2:2019, EN 61000-6-3:2007/A1:2011/AC:2012, EN 61000-6-4:2019 |
| Environment | ETSI EN 300 019-2-1 v2.3.1:2017 (Class 1.2) ETSI EN 300 019-2-2 v2.4.1:2017 (Class 2.3) ETSI EN 300 019-2-3 v2.4.1:2015 (Class 3.2) ETSI EN 300 132-2 v2.6.1:2019 Normal operating conditions as per IEC 62040-5-3:2016 clause 4.2. Other operating conditions as per IEC 62040-5-3:2016 clause 4.3, must be advised |
Find the Right Model
| Model Number | Input Voltage (Vdc) | Output Voltage (Vdc) | Max. Output Power (W / kW) | ||
|---|---|---|---|---|---|
|
2U Solar Extension Kit (6.4 kW) | 85-420Vdc | 53.5Vdc | 6400W | |
|
|
3U Solar Extension Kit (12.8 kW) | 85-420Vdc | 53.5Vdc | 12800W |
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