GoodWe – MT Series 50 kW and 60 kW 3-Phase Grid-Tie Inverter

The GoodWe MT Series (50 kW / 60 kW) is a three-phase grid-tie inverter designed for commercial rooftop or ground-mounted solar PV systems—particularly medium to large scale installations where flexibility, reliability and return on investment are key. According to GoodWe’s specification sheet, this series supports DC input oversizing up to 150 % and AC output power overload (boost) up to 115 % (or in some references up to 150 %): “With its compact design and power boost function, the GoodWe MT series … can provide a 150% continuous maximum AC output power overload, offering a faster return on investment.”Key starting specifications include a low start-up voltage of 200 V (which enables earlier operation under lower irradiance), making it particularly suitable in regions with variable solar conditions.

Features & Benefits

• Low start-up voltage (200 V): Enables the system to start generating earlier in the day (or under less intense sunlight) thereby increasing energy yield over the year.
• High DC oversizing (up to 150 %): Allows the PV array size (in kW DC) to be substantially larger than the inverter’s rated AC output, which increases the energy harvest especially during non-peak insolation periods and leads to improved ROI.
• AC power boost capability: Being able to exceed nominal AC output for certain periods (115 % or more) means more flexibility, better use of array and inverter sizing, and helps to capture more energy during high-irradiance or cooler conditions.
• Four MPPTs: With multiple MPPT inputs the system can handle more complex array layouts (e.g., different orientations or partial shading) without as much performance penalty.
• High efficiency (~99 %): Lower conversion losses mean more of the solar energy is turned into usable AC power, improving system economics.
• Robust design for high ambient temperature: The ability to run at full load in 50 °C ambient conditions means the inverter is capable of performing in hot climates without derating — a strong plus for many African contexts.
• Compact/weight-optimised design: The series is described as being “more compact – >20% less volume and weight compared to other inverters” which simplifies installation and reduces mounting or structural costs.
• Monitoring & communication integration: String-level monitoring and PLC communication facilitate operations, maintenance and system optimization.
• Global certifications / grid compliance: The MT series was the first non-European inverter to obtain the demanding certification VDE‑AR‑N 4110‑2018, which verifies its suitability for modern grid environments and reliability.

Use Cases

• Commercial rooftop installations (warehouses, factories, shopping centres) where there is ample roof space and partial shading may occur.
• Ground-mounted mid-size solar PV farms (50-100 kW or similar multiples) where medium scale is required but utility scale (>1 MW) is not yet needed.
• Business/industrial users in Tanzania (such as hotels, manufacturing plants, large offices) seeking to reduce grid electricity bills, hedge against load growth, or comply with sustainability goals.
• Systems where array oversizing or boosting generation early/late in the day is a design requirement (e.g., off‐peak load matching or export optimisation).
• Regions with warmer ambient temperatures and high irradiance (such as East Africa) where thermal performance and earlier start are beneficial.

Value Propositions

• Energy Capture Optimised for Warm Climate & Variable Irradiance: With low start-up voltage and ability to run full load at 50 °C, the MT Series is well suited to high ambient temperatures and strong sun – common in Tanzania’s regions.
• Maximising Roof Utilisation / Oversizing Opportunity: Many commercial roofs in Tanzania may benefit from DC oversizing (i.e., installing more PV than the inverter nominal rating) to capture early morning/late afternoon production. This means you can get more kWh per installed kW of inverter capacity, improving ROI.
• Commercial/Industrial Scale Fit: For business customers (hotels, manufacturing, agro‐processing, large offices) the 50-60 kW size is a good fit—big enough to make a meaningful reduction in electricity bills, yet small enough to be manageable and cost-effective for many sites.
• Brand & Reliability: GoodWe has global deployment and has earned certifications and reputation for high quality—helping reduce risk for investors or developers in Tanzania.
• Return on Investment (ROI) Focus: With power boost capability and oversizing flexibility, the system can offer faster payback for commercial users, which is a compelling selling point in a market where utility tariffs or diesel backup costs may be high.
• Local Business Case: Tanzania’s renewable energy policies, feed-in tariff or net-metering frameworks (depending on region) and rising industrial electricity demand mean that systems with high performance and reliability can provide long-term value.

Local Market Positioning in Tanzania

• position this inverter as “commercial grade, high-performance, cost-effective for medium-sized commercial solar PV in Tanzania”. Emphasise how it fits between smaller residential inverters and large utility scale units.
• Highlight how the features (low start-up voltage, oversizing support, four MPPTs) reduce design constraints, enabling installers to make the most of existing roofs that may have shading or split zones.
• Ensure the local installer or distributor emphasises training, warranty support and availability of spare parts—these can be key differentiators in the Tanzanian market.
• Clarify how the inverter integrates with grid-tie regulation in Tanzania (three-phase output, compliance with local grid code, ability to monitor remotely, etc.).
• Provide case‐studies or references (if available) in East African context to build trust. GoodWe indicates the MT-Series has global deployment including in Kenya.
• Emphasise total system cost and lifecycle cost—pointing out how higher efficiency, less derating, and oversizing flexibility can lower cost per kWh generated over the system lifetime.

Technical Specification