General specifications 
Operating temperature -20 °C to 60 °C; full power up to 45 °C-4 to 140 °F
Enclosure coated aluminium
Protection degree IP65 electronics for outdoor application
Relative humidity 4-100% condensing
Safety class class I
Inverter technology transformerless
Cooling passive + fan
Dimensions, hxwxd 630x650x260 mm24.80 x 25.59 x 10.24 inches
Weight 39 kg 85.98 pounds
Solar input (DC) specifications 
PV power range 6800-9300 Wp
Max. input power 8200 W
Start-up power 20 W
Operating voltage range 180-950 V
MPP voltage range at nom. power 365-800 V
Nom. voltage 650 V
Max. voltage 1000 V
Number of inputs 2 sets MultiContact MC4 connectors
Number of MPP trackers 2 MPP trackers
Efficiency MPP trackers (static/dynamic) > 99.9 % / 99.8 %
Nom. input current 2x 9 A
FlexPower 2:1
Max. power per tracker 5,1 kW
Grid output (AC) specifications 
Grid voltage 400/230 V (3/N/PE) ± 20%
Nom. output power 7500 VA
Max. output power 7880 VA
Max. output current 3x 12 A
Frequency 50/60 Hz
Power factor > 0.99 at full power
Reactive power control 0.80 inductive .. 0.80 capacitive
DC current injection < 0.25% In
RCD integrated; 30/300 mA DC sensitive
Low Voltage Ride Through (LVRT) integrated
Standby power < 2 W
EU efficiency 96.9 %
Max. efficiency 97.4 %
AC connection IP67 3-phase, suitable for 4-10 mm² cables
Regulations & directives 
CE conformity yes
Nat. grid requirements VDE0126-1-1; VDE AR-N-4105; BDEW; RD1663; G59/2; Synergrid C10/11; CEI-021; G83/1-1
Communication & monitoring 
Display multi-language graphical LCD display
Diagnostics datalogger with 10 year memory
Communication 2x RS485 connections / MasterBus field service interface / MasterBus string box interface

YAMAHA Inverter EF1000iS

At Yamaha, we like to take a good thing and figure out how to make it even better.

ust take the EF1000iS, the smallest member of our trusted line of inverter generators. As in, just take it anywhere you want: Weighing in at just 12.7 kg, it can be carried with one hand. Inverter technology means that this lightweight 4-stroke beauty combines quality power and clean exhaust that's in step with the world's strictest emissions standards.