# Silfab Prime SIL-420 BG 420W

> perc-monocrystalline - 420W Residential & Commercial Solar Module

**Voltformer canonical:** https://voltformer.com/product/silfab-prime-sil-420-bg - markdown version: https://voltformer.com/product/silfab-prime-sil-420-bg.md

## Overview

- **Brand:** Silfab Solar
- **Model / SKU:** SIL-420-BG
- **Category:** Residential & Commercial Solar Systems / residential-solar-panels
- **Cell Technology:** perc-monocrystalline (108 cells)
- **Origin / Assembly:** ABD (Bellingham, WA & Fort Mill, SC)
- **B2C Popularity Rank:** #4 in US Residential Solar Market

## Electrical Specifications (STC)

- **Rated Maximum Power (Pmax):** 420 W
- **Module Efficiency:** 21.4%
- **Max Power Voltage (Vmp):** 31.85 V
- **Max Power Current (Imp):** 13.19 A
- **Open Circuit Voltage (Voc):** 38.3 V
- **Short Circuit Current (Isc):** 13.8 A
- **Temperature Coefficient (Pmax):** -0.35 %/°C

## Mechanical Specifications

- **Dimensions:** 1735 × 1132 × 35 mm
- **Weight:** 21 kg
- **Snow / Front Load:** 5400 Pa
- **Wind / Rear Load:** 4000 Pa
- **Connector Type:** MC4 compatible

## Compatibility Engine & Inverter Matches

- **Matched Microinverters:** Enphase Energy Enphase IQ8M Microinverter (325VA) (DC/AC 1.29:1)
- **Matched Hybrid Inverters:** Tesla Energy Tesla Powerwall 3 (11.5 kW Inverter)
- **Compatible Energy Storage:** Tesla Energy Tesla Powerwall 3 (13.5 kWh LFP) (13.5 kWh)
- **Racking Systems:** IronRidge IronRidge XR100 Roof Mount

## Turnkey DIY Starter Kits

- **Made-in-USA Family Home Solar Kit (6.7 kW - 16 Panels):** 16 panels (6.72 kW) - Est. 850 kWh/month

## Warranty & Certifications

- **Product Warranty:** 25 Years
- **Performance Warranty:** 30 Years (85% at Year 25)
- **Standards:** UL 61730 Type 1 / Type 2 Fire Safety, IEC 61215:2021 / IEC 61730:2021 Design Qualification, CEC Listed, ISO 9001:2015 Quality Management

## Official Sources

- https://silfabsolar.com/silfab-prime-sil-420-bg/
- https://enphase.com/installers/microinverters/iq8m
- **Last Verified:** 2026-09-28