SYSTEM Energy

The M250 Photovoltaic Inverter is the 4th Generation micro-inverter released by Enphase Energy. It produces 250 Watts peak AC output power with MPPT to optimize efficiency in difficult solar conditions.

In the M250, the DC circuit is isolated and insulated from ground, so no External Ground Electrode Conductor (GEC) is required. The M250 is fully filled with Resin to protect the components from the weather constraints and to improve the thermal dissipation.

Based on a complete teardown analysis, the report provides an estimation of the production cost of the M250 inverter, and a comparison with previous report on M215.

This reverse costing report contains:

• Detailed photos
• Material analysis
• Manufacturing process flow
• In-depth economical analysis
• Manufacturing cost breakdown
• Selling price estimation

 1. Overview / Introduction

• Executive Summary
• Differences Unveiled
• Reverse Costing Methodology
• Company Profile : Enphase Energy
• Main Features

 2. Physical Analysis

• Views and Dimensions of the Inverter
• Inverter Opening
• Connectors of the Inverter
• Electronic Board
• Electronic Board – Top Side – Global View
• Electronic Board – Top Side – High Definition Photo
• Electronic Board – Top Side – Markings
• Electronic Board – Top Side – Components Identification
• Electronic Board – Bottom Side – Global View
• Electronic Board – Bottom Side – High Definition Photo
• Electronic Board – Bottom Side – Components Identification

 3. BOM Cost

• Accessing the BOM
• Estimation of the cost of the PCB
• Estimation of the cost of the Enphase ASIC
• BOM Cost – Electronic Board
• Estimation of the cost of the Housing Parts
• BOM Housing
• Material Cost Breakdown

4. Added Value Cost

• Assessing the Added Value (AV) cost
• Electronic Board Manufacturing Flow
• Details of the Electronic Board AV Cost
• Details of the System Assembly AV Cost
• Added Value Cost Breakdown
• Manufacturing Cost Breakdown

 5. Estimation of the selling price

• Manufacturing cost breakdown
• Estimation of the Selling Price
• Comparison between M250 and M215

6. Contacts

• Enphase S280 Microinverter
• ENPHASE ENERGY – M215 Solar Microinverter
• SMA Sunny Island 6.0H
• SMA Sunny Boy 1.5 – Solar inverter
• TIGO Energy MM-2ES 50
• EnOcean PTM210 Self-Powered Push Button Transmitter Module
• REFUsol 020K-SCI 20 KW Commercial PV Inverter
• SMA Solar Microinverter – Sunny Boy 240-US
• Power-One TRIO-27.6-TL 30 KW Commercial PV Inverter
• SMA Sunny Boy 3000TL – Solar inverter