Question 1

What are the core electrical conversion specifications and MPPT performance of the Eltek Flatpack2 48/1500 HE Solar (241115.650)?

Accepted Answer

The module delivers a rated power output of 1500 W at nominal -48 VDC (adjustable between -43.5 and -57.6 VDC) with a maximum continuous output current of 31.2 A. Engineered specifically for telecom solar arrays, it features an ultra-fast MPPT tracking algorithm with dynamic efficiency exceeding 99% and a peak DC-DC conversion efficiency of 96.5%. Its wide solar string input window spans DC 80 to 400 V (approx. 90 VDC startup), maximizing energy harvest and providing clean, low-ripple DC power across extreme solar irradiance fluctuations.

Question 2

How compatible is this solar module with existing Eltek shelves, and does it support hybrid operation with AC rectifiers?

Accepted Answer

Utilizing the standard Flatpack2 form factor (109 × 41.5 × 327 mm), the 241115.650 module is 100% hot-swappable into standard Flatpack2 power shelves. It supports mixed operation in hybrid systems alongside Eltek AC rectifiers (such as Flatpack2 48/2000 HE or 3000 HE). Controlled via CAN bus by Smartpack, Smartpack S, or Smartpack2 supervisory units, the system applies digital active current sharing and solar-priority logic, dynamically utilizing 100% solar yield first and seamlessly blending in grid/generator AC rectification without bus voltage drop.

Question 3

What environmental tolerance metrics and hardware protection mechanisms does the Flatpack2 48/1500 HE Solar offer for rugged sites?

Accepted Answer

Designed for off-grid and edge telecom infrastructure, the module operates continuously within -40°C to +75°C (with smart derating initiated above +45°C) utilizing front-to-back forced airflow driven by an internal temperature-controlled fan. Hardware protections encompass DC PV input reverse polarity protection, output short-circuit current limiting, output over-voltage protection (OVP), internal thermal protection (OTP), and high-energy surge protection. Evaluated per Telcordia SR-332, its calculated MTBF exceeds 300,000 hours, ensuring rock-solid field reliability under harsh ambient conditions.

Key specifications	Value
Rated Output Power	1500 W
Nominal Output Voltage	-48 VDC
Rated Output Current	31.2 A
Output Voltage Range	-43.5 ~ -57.6 VDC
AC Input Voltage Range	DC 80 ~ 400 V (PV string MPPT input range)
Power Conversion Efficiency	96.5%; MPPT tracking efficiency > 99%
Output Power Factor PF	High-efficiency DC conversion architecture for pure solar power
Physical Dimensions Spec	109 × 41.5 × 327 mm (standard Flatpack2 dimensions)
Operating Temperature	-40°C to +75°C

Eltek Flatpack2 48/1500 HE Solar MPPT Converter (Part No. 241115.650)

What this product is

What this product is

What problem it solves

Who and where it is for

Core advantages

Technical specifications

Applications

Off-grid solar telecom stations

Solar-diesel hybrid power installations

Telecom site green energy retrofits

Frequently asked questions

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