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SI4.4M-13 vs SPF 3500 ES 3 of 14 identical Swap Change inverters

SMA Solar SI4.4M-13 vs Growatt SPF 3500 ES

SMA Solar SI4.4M-13
SMA Solar
SI4.4M-13
3.3 kW Off-grid
Open inverter page Datasheet PDF
VS
Growatt SPF 3500 ES
Growatt
SPF 3500 ES
3.5 kW Off-grid
Open inverter page Datasheet PDF
The verdict

11 differences, and they point both ways

The largest is rated ac power: 0.20 kW apart. 3 of 14 comparable parameters are identical, with 18 more left out because at least one datasheet does not publish them.

See all 11 differences
How alike are they
3 of 14 comparable
parameters are identical
identical differs not published
01

What actually differs

11 of 14 parameters
Parameter SI4.4M-13 SPF 3500 ES Difference
Rated AC power 3.30 kW 3.50 kW 0.20 kW apart
Max DC voltage 63 V 450 V 387 V apart
Max efficiency 95.5 % 93.0 % 2.5 pp more efficient
Max AC power 5.50 kW 3.50 kW 2.00 kW apart
Weight 44.0 kg 11.5 kg 32.5 kg lighter
Weight per kW 13.3 kg/kW 3.3 kg/kW 10.0 kg/kW lighter
Max operating temperature 60 °C 55 °C 5 °C more heat tolerant
Ingress protection IP54 IP20 IP54 vs IP20
MPPT voltage range 41-63 V 120-430 V 41-63 V vs 120-430 V
Battery voltage 41-63 V (48 V nominal) 48VDC 41-63 V (48 V nominal) vs 48VDC
Dimensions 612x467x242 mm 485x330x135 mm 612x467x242 mm vs 485x330x135 mm
02

Full specification

Parameter SI4.4M-13 SPF 3500 ES Difference
AC output
Rated AC power 3.30 kW 3.50 kW 0.20 kW apart
Max AC power 5.50 kW 3.50 kW 2.00 kW apart
Grid connection Single-phase Single-phase Same
Nominal AC voltage 230 V 230 V Same
Max AC current 60.0 A - Not published by Growatt
PV input
Max PV power - 4.50 kW Not published by SMA Solar
DC/AC ratio - 1.29 Not published by SMA Solar
Max DC voltage 63 V 450 V 387 V apart
MPPT voltage range 41-63 V 120-430 V 41-63 V vs 120-430 V
Start voltage - - Neither datasheet publishes this
MPP trackers - 1 Not published by SMA Solar
Strings per tracker - 1 Not published by SMA Solar
Max input current per tracker - - Neither datasheet publishes this
Efficiency
European efficiency - - Neither datasheet publishes this
Max efficiency 95.5 % 93.0 % +2.5 pp for SI4.4M-13
CEC efficiency - - Neither datasheet publishes this
Battery
Battery input Yes Yes Same
Battery voltage 41-63 V (48 V nominal) 48VDC 41-63 V (48 V nominal) vs 48VDC
Max charge current - - Neither datasheet publishes this
Backup power - - Neither datasheet publishes this
Physical
Weight 44.0 kg 11.5 kg -32.5 kg for SPF 3500 ES
Weight per kW 13.3 kg/kW 3.3 kg/kW -10.0 kg/kW for SPF 3500 ES
Dimensions 612x467x242 mm 485x330x135 mm 612x467x242 mm vs 485x330x135 mm
Ingress protection IP54 IP20 IP54 vs IP20
Cooling - - Neither datasheet publishes this
Noise - - Neither datasheet publishes this
Max operating temperature 60 °C 55 °C +5 °C for SI4.4M-13
Connectivity and safety
Wi-Fi - - Neither datasheet publishes this
Ethernet Yes - Not published by Growatt
Arc fault protection - - Neither datasheet publishes this
Integrated DC switch - - Neither datasheet publishes this
Warranty
Warranty 10 yrs - Not published by Growatt
03

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04

Written summary

Every figure here is from the manufacturers' own datasheets - a dash means the value is not published, never an estimate.