Product Overview

Designed to deliver energy independence and blackout resilience, the Growatt SPF 3500 ES allows homeowners to slash utility bills through direct solar self-consumption. It operates with or without a battery bank and features intelligent power blending to ensure your critical appliances—such as refrigerators, lights, televisions, and computing devices—run continuously without interruption during grid fluctuations or prolonged outages.

Key Features

Battery-Free Operation: Powers household AC loads directly from solar energy during daylight hours without requiring an initial battery bank investment.

High-Voltage PV Input: Supports up to 450V DC maximum open-circuit voltage (120V–430V MPPT range), allowing long series panel strings to reduce wiring complexity and installation costs.

Robust Solar Input Capacity: Accepts up to 4,500W of PV array power backed by an integrated 80A MPPT solar charge controller.

Intelligent Power Blending: Simultaneously blends solar energy with grid or generator power to support heavy appliance loads whenever solar production drops.

Dual Battery Chemistry Support: Compatible with 48V Lithium-ion (LiFePO4) batteries via CAN/RS485 BMS communication, as well as conventional Lead-Acid, AGM, and Gel battery banks with equalization charging.

Parallel Expandability: Scales up to 6 units in parallel for both single-phase and three-phase systems, achieving a total power capacity of up to 21 kW.

Seamless UPS Backup: Features an ultra-fast 10 ms transfer time, keeping computers, routers, and sensitive electronics running smoothly without reboots.

Smart Remote Monitoring: Supports plug-and-play Wi-Fi or GPRS dongles for remote performance tracking via the Growatt ShinePhone app and web platform.

2-Year Warranty: Backed by a standard 2-year manufacturer warranty covering internal component defects (excludes burns and physical damage).

Technical Specifications

PV (DC) Input

Parameter	Specification
Max. PV Array Power	4,500 W
Max. PV Open-Circuit Voltage ($V_{oc}$)	450 V DC
MPPT Operating Voltage Range	120 V DC – 430 V DC
Max. Solar Charge Current	80 A
Number of MPPT Trackers / Strings	1 / 1

Battery Storage

Parameter	Specification
Battery Type	Lithium-ion / Lead-Acid / AGM / Gel
Nominal Battery Voltage	48 V DC
Max. AC Charge Current	60 A
Max. Combined Charge Current	80 A
Communication Ports	RS485 / CAN / USB

AC Output (Inverter)

Parameter	Specification
Rated Output Power	3,500 VA / 3,500 W
Waveform	Pure Sine Wave
Surge Power (Peak)	7,000 VA (2× rated power for 5 seconds)
AC Output Voltage	230 VAC ± 5% @ 50/60 Hz
Peak Efficiency	93%
Transfer Time	10 ms (UPS mode), 20 ms (Appliances mode)
Parallel Capability	Up to 6 units (Single-Phase or 3-Phase)

General Information

Parameter	Specification
Dimensions (W × H × D)	330 × 485 × 135 mm
Net Weight	11.5 kg
Operating Temperature Range	0°C to 55°C
Cooling	Smart Cooling Fans
Warranty	2 Years (excludes burns & physical damage)

Total Item (0)

Growatt 3.5kW Off Grid Hybrid Solar Inverter (SPF 3500 ES)

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