SMA SUNNY BOY 3.8-US - User Manual

Other manuals for SMA SUNNY BOY 3.8-US

Installation Manual75 pages

Service Manual40 pages

Questions and Answers

E
elizabethsloanNov 22, 2025
What to do if SMA Inverter shows 'Grid fault'?
- J
  Jared DavisNov 22, 2025
  If your SMA Inverter displays a 'Grid fault' message, it could be due to several reasons: * The grid voltage or grid impedance at the connection point of the inverter is too high. * The utility grid has been disconnected, the AC cable is damaged, or the grid voltage at the connection point of the inverter is too low. * The ten-minute average value of the grid voltage is no longer within the permissible range. * A stand-alone grid or a very large change in the power frequency was detected. * The power frequency is not within the permissible range. * The inverter has detected an excessively high proportion of direct current in the grid current. To resolve this, ensure the circuit breaker is switched on, the AC cable is not damaged and correctly connected, and the correct c...
B
Brian TaylorAug 25, 2025
What to do if SMA SUNNY BOY 3.8-US shows 'L/N swapped > Check connection'?
- D
  Dylan WardAug 26, 2025
  If your SMA Inverter displays 'L/N swapped > Check connection', ensure that L and N are correctly connected.
H
Holly FletcherAug 27, 2025
What does 'Update file defect.' mean on SMA SUNNY BOY 3.8-US Inverter?
- J
  James CollinsAug 27, 2025
  The message 'Update file defect.' on your SMA Inverter means that the update file is defective. The update failed, but the inverter continues to feed in.
R
Ryan HallAug 27, 2025
What does 'Frq. not permitted > Check parameter' mean on SMA Inverter?
- M
  Matthew WhitneyAug 27, 2025
  The message 'Frq. not permitted > Check parameter' on your SMA Inverter indicates that the power frequency is not within the permissible range. If possible, check the power frequency and observe how often fluctuations occur.
J
John KaneAug 28, 2025
What does 'Waiting for grid voltage > Installation failure grid connection > Check grid and fuses' mean on SMA Inverter?
- G
  griveraAug 29, 2025
  This message on your SMA Inverter indicates that L or N is not connected. Ensure that L and N are connected, the AC conductors are not damaged and correctly connected, and the circuit breaker is switched on.
M
Mark BakerSep 16, 2025
What does 'Incorrect file format' mean on SMA Inverter?
- R
  Randall JohnsonSep 16, 2025
  The message 'Incorrect file format' on your SMA Inverter means that the configuration file is not of the required format or is damaged. Ensure that the selected configuration file is of the required format and is not damaged. Retry import.
C
Cynthia MartinSep 14, 2025
What does 'Update transport failed' mean on SMA SUNNY BOY 3.8-US Inverter?
- G
  Gail NavarroSep 14, 2025
  The message 'Update transport failed' on your SMA Inverter means that the update file could not be copied to the inverter's internal memory. If connected via WLAN, a poor connection quality could be the cause. Retry the update. For WLAN connection, improve the WLAN connection quality or establish connection with the inverter via Ethernet.
D
David JohnsonSep 15, 2025
What does 'Incompatible file' mean on SMA SUNNY BOY 3.8-US Inverter?
- P
  Pamela MosleySep 15, 2025
  The message 'Incompatible file' on your SMA Inverter means that the configuration file is not suitable for this inverter. Ensure that the selected configuration file is suitable for this inverter and retry the import.
K
kevin69Sep 6, 2025
What does 'DC overcurrent > Check generator' mean on SMA SUNNY BOY 3.8-US?
- L
  Lisa GoodmanSep 6, 2025
  The message 'DC overcurrent > Check generator' on your SMA Inverter indicates overcurrent at the DC input. Ensure that the PV array has been correctly rated and wired.
B
boydanitaSep 4, 2025
What does 'High discharge curr. > Check generator' mean on SMA Inverter?
- K
  Kelly KlineSep 4, 2025
  The message 'High discharge curr. > Check generator' on your SMA Inverter means that the leakage current of the inverter and the PV array is too high. Check the PV system for ground faults.

SMA SUNNY BOY 3.8-US Specifications

General

Model	SUNNY BOY 3.8-US
Type	String inverter
Rated AC Power	3.8 kW
AC Nominal Power	3.8 kW
Nominal AC Voltage	240 V
AC Voltage Range	211 - 264 V
Nominal AC Frequency	60 Hz
Total Harmonic Distortion	< 3%
Number of DC Inputs	2
Number of MPP Trackers	2
CEC Weighted Efficiency	97.0%
Night Time Consumption	< 1 W
Topology	Transformerless
Cooling	Convection
Enclosure Rating	NEMA 3R
Operating Temperature Range	-25 °C to +60 °C
Operating Temperature Range (°C)	-25 to +60
Warranty	10 years
Maximum AC Apparent Power	3800 VA
Power Factor at Nominal Power	1.0
Maximum Input Current	11 A
Efficiency	97.5%
Communication	Ethernet, WLAN, Wi-Fi
Weight (kg)	15