The Growatt SPF 3500 ES is an inverter that can operate both with and without a battery. The maximum input voltage is 450VDC. Integration of an MPPT charge controller optimizes charging and discharging of the battery, making it last as long as possible. Priority can be given to charging via the grid or the connected PV system. The system can also be remotely monitored using a WiFi or GPRS dongle. Parallel scaling is supported.

The MPPT charge controller lowers the voltage of panels to the required level to charge the battery. The current is raised with the same ratio the voltage is lowered. This continuously happens during the day to optimize the use of energy. This is dependent on the power of the sun, the angle and the temperature and health of the panels. The charge controller also makes sure the battery will not be overcharged, but also not fully discharged.

The system’s capacity can be expanded up to 21 KW by combining a total of six of these units in parallel operation.

Growatt SPF3500-ES Hybrid Off-Grid MPPT Solar Inverter Specifications

Growatt SPF3500-ES Hybrid Off-Grid MPPT Solar Inverter Datasheet
Model Name	SPF 3500 ES	SPF 5000 ES
INVERTER OUTPUT
Recommended max. PV power	3500VA/ 3500W	5000VA/ 5000W
Parallel Capability	Yes, 6 units maximum
AC Voltage Regulation	230VAC ± 5% @ 50/60Hz
Surge Power	7000VA	10000VA
Efficiency (Peak)	93%
Waveform	Pure sine wave
Transfer Time	10ms typical, 20ms Max
SOLAR CHARGER
Maximum PV Array Power	4500W	6000W
MPPT Range @ Operating Voltage	120VDC ~ 430VDC
Number of Independent MPP Trackers/ Strings Per MPP Tracker	1/1
Maximum PV Array Open Circuit Voltage	450VDC
Maximum Solar Charge Current	80A	100A
AC CHARGER
Charge Current	60A	80A
230 VAC	230 VAC
Frequency Range	50Hz/60Hz (Auto sensing)
PHYSICAL
Protection Degree	IP20
Dimension (W/H/D)	330/485/135mm
Net Weight	12kg

The product description

1. LCD display	2. Status indicator
3. Charging indicator	4. Fault indicator
5. Function buttons	6. AC input
7. WiFi/GPRS communication port	8. USB communication port
9. BMS communication port (support CAN/RS485 protocol)	10. RS485 communication port(for expansion)
11. Dry contact	12. PV input
13. Power on/off switch	14. Battery input
15. Parallel communication ports	16.Current sharing ports
17. AC output	18. Circuit breaker

Growatt SPF3500-ES Hybrid Off-Grid MPPT Solar Inverter Features

*Rated power 3.5KW to 5KW, power factor 1
*MPPT ranges 120V~430V, 450Voc
*High frequency inverter with small size and light weight
*Pure sine wave AC output
*Solar and utility grid can power loads at the same time
*With CAN/RS485 for BMS communication
*With the ability to work without battery
*Parallel operation up to 6 unit (only with battery connected)
*WIFI/ GPRS remote monitoring (optional)

This is a multifunctional off grid solar inverter, integrated with a MPPT solar charge controller, a high frequency pure sine wave inverter and a UPS function module in one machine, which is perfect for off grid backup power and self-consumption applications.This inverter can work with or without batteries.