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Off-grid Inverter
FSF-4.2K1P-BL
The FSF‑4.2K1P‑BL is a reliable IP21‑rated off‑grid inverter. Compact and lightweight at 5.4 kg for easy installation and transport, it supports 150% PV oversizing and delivers full‑power non‑derated operation at 40℃. Standard‑fitted with a segment LCD display, it is ideal for residential off‑grid power systems.
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Products Off-grid Inverter FSF-4.2K1P-BL
Feature Highlights
High Yields
  • 60V~450V wide MPPT voltage range
Flexible Connection
  • CAN/RS485 for BMS communication
  • CT access for anti-backflow function
Safe & Reliable
  • 100% output at 40℃ condition
  • 4ms on/off-grid transition
  • 2 times the rated power for 5s
  • 28A bypass load-carrying capacity
Smart O&M
  • Built-in WiFi module for monitoring
  • OTA upgrade supported
Product Overview
FSF-4.2K1P-BL
Product Model
FSF-4.2K1P-BL
Nominal Output Power
4200W
Max. PV Input Power
6300W
Max. Input Voltage
500V
Number of MPPT
1
Max. Input Current
18A
Max. Charge Current
120A
Max. Discharge Current
140A
Product Dimension
385*295*115mm
Weight
5.4kg
Ingress Protection
IP21
Communication
RS485/ CAN/ Wi-Fi / CT (optional)
Installation Video
Play
Resource Downloads
Datasheet
FSF-4.2K1P-BL-PRO_规格书_中文 .pdf
3.03M | PDF
Datasheet
FSF-4.2K1P-BL-PRO_Datasheet_EN .pdf
3.03M | PDF
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