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ISolar SMR II 3.5KW vs SI4.4M-13 3 of 12 identical Swap Change inverters

Easun Power ISolar SMR II 3.5KW vs SMA Solar SI4.4M-13

Easun Power
ISolar SMR II 3.5KW
3.5 kW Off-grid
Open inverter page Datasheet PDF
VS
SMA Solar SI4.4M-13
SMA Solar
SI4.4M-13
3.3 kW Off-grid
Open inverter page Datasheet PDF
The verdict

9 differences, and they point both ways

The largest is rated ac power: 0.20 kW apart. 3 of 12 comparable parameters are identical, with 20 more left out because at least one datasheet does not publish them.

See all 9 differences
How alike are they
3 of 12 comparable
parameters are identical
identical differs not published
01

What actually differs

9 of 12 parameters
Parameter ISolar SMR II 3.5KW SI4.4M-13 Difference
Rated AC power 3.50 kW 3.30 kW 0.20 kW apart
Max DC voltage 500 V 63 V 437 V apart
Max efficiency 93.5 % 95.5 % 2.0 pp more efficient
Max AC power 3.50 kW 5.50 kW 2.00 kW apart
Weight 11.5 kg 44.0 kg 32.5 kg lighter
Weight per kW 3.3 kg/kW 13.3 kg/kW 10.0 kg/kW lighter
Max operating temperature 50 °C 60 °C 10 °C more heat tolerant
MPPT voltage range 120-450 V 41-63 V 120-450 V vs 41-63 V
Dimensions 550x420x225 mm 612x467x242 mm 550x420x225 mm vs 612x467x242 mm
02

Full specification

Parameter ISolar SMR II 3.5KW SI4.4M-13 Difference
AC output
Rated AC power 3.50 kW 3.30 kW 0.20 kW apart
Max AC power 3.50 kW 5.50 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 Easun Power
PV input
Max PV power 5.50 kW - Not published by SMA Solar
DC/AC ratio 1.57 - Not published by SMA Solar
Max DC voltage 500 V 63 V 437 V apart
MPPT voltage range 120-450 V 41-63 V 120-450 V vs 41-63 V
Start voltage - - Neither datasheet publishes this
MPP trackers - - Neither datasheet publishes this
Strings per tracker - - Neither datasheet publishes this
Max input current per tracker - - Neither datasheet publishes this
Efficiency
European efficiency - - Neither datasheet publishes this
Max efficiency 93.5 % 95.5 % +2.0 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) Not published by Easun Power
Max charge current - - Neither datasheet publishes this
Backup power - - Neither datasheet publishes this
Physical
Weight 11.5 kg 44.0 kg -32.5 kg for ISolar SMR II 3.5KW
Weight per kW 3.3 kg/kW 13.3 kg/kW -10.0 kg/kW for ISolar SMR II 3.5KW
Dimensions 550x420x225 mm 612x467x242 mm 550x420x225 mm vs 612x467x242 mm
Ingress protection - IP54 Not published by Easun Power
Cooling - - Neither datasheet publishes this
Noise - - Neither datasheet publishes this
Max operating temperature 50 °C 60 °C +10 °C for SI4.4M-13
Connectivity and safety
Wi-Fi - - Neither datasheet publishes this
Ethernet - Yes Not published by Easun Power
Arc fault protection - - Neither datasheet publishes this
Integrated DC switch - - Neither datasheet publishes this
Warranty
Warranty - 10 yrs Not published by Easun Power
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.