STP25000TL-30 refurbished PV inverter

SMA STP25000TL-30 Refurbished: 25 kW Three-Phase String Inverter

The SMA Sunny Tripower STP25000TL-30 is a transformerless, three-phase string inverter designed for medium-scale photovoltaic systems. Available here as a refurbished unit under reference STP25-TL30-2-D-AT, it is suited to professional installers, SMEs, and experienced self-builders looking to benefit from SMA's proven technology at a reduced cost.

What Does Refurbished Mean?

A refurbished inverter is a previously used device that has undergone a restoration process: electronic diagnostics, replacement of faulty components where required, cleaning, and functional testing. It is not a new product. The exact condition of the unit, any signs of prior use, and the applicable warranty terms are communicated at the time of ordering. We strongly recommend contacting our technical team to obtain all available information on the unit's history and condition before placing an order.

About the Sunny Tripower Series

SMA's Sunny Tripower (STP) range is a line of transformerless three-phase inverters widely deployed in commercial and industrial PV installations throughout Europe. The STP25000TL-30 delivers a nominal AC output power of 25 kW, making it suitable for mid-scale systems, typically in the range of 25 to 35 kWp depending on the array configuration.

The OptiTrack Global Peak technology integrated into this series enables effective management of partial shading through multiple maximum power point tracking (MPPT) inputs. The transformerless design contributes to high efficiency and a compact form factor that simplifies installation.

Key Considerations for This Refurbished Unit

• No complete manufacturer datasheet is currently available in our system for this specific refurbished reference. Power ratings, MPPT voltage range, efficiency figures, and certifications should be verified against official SMA documentation or by contacting our technical support.
• Compatibility with your installation (string voltage, number of strings, grid connection) must be confirmed before ordering. This inverter is a grid-tied device only — the Sunny Tripower range does not natively support battery storage.
• This inverter requires a three-phase AC grid connection. It is not suitable for off-grid or island operation without additional equipment.
• Applicable certifications (VDE, IEC, EN) depend on the exact hardware version and target market. Please refer to the unit's nameplate or contact us for clarification.

Why Choose a Refurbished Inverter?

Choosing a refurbished inverter can significantly reduce the cost of a new installation or a replacement project, while retaining the performance associated with an established brand such as SMA. It also aligns with a circular economy approach by extending the operational life of quality electronic equipment.

At Wattuneed, refurbished units are selected carefully and our technical team is available to assist you in assessing the suitability of this inverter for your specific PV project. Please do not hesitate to reach out before purchasing.