SMA SUNNY BOY 3.8-US User Manual (English)

Other manuals for SMA SUNNY BOY 3.8-US

Service Manual40 pages

Installation Manual75 pages

Questions and Answers:

W
William DavisSep 7, 2025
Why SMA SUNNY BOY 3.8-US is 'Waiting for DC start conditions > Start cond. not met'?
- K
  Kimberly WallerSep 7, 2025
  The SMA Inverter displays 'Waiting for DC start conditions > Start cond. not met' because the feed-in conditions for the utility grid are not yet fulfilled. Ensure that the PV array is not covered by snow or otherwise shaded. Wait for higher irradiation. If this message is displayed frequently in the morning, increase the voltage limit for starting grid feed-in by changing the parameter Critical voltage to start feed-in. If this message is displayed frequently with medium irradiation, ensure that the PV array is correctly rated.
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.
G
George McgeeAug 30, 2025
What does 'DC overvoltage > Disconnect generator' mean on SMA Inverter?
- R
  rayronaldAug 30, 2025
  The 'DC overvoltage > Disconnect generator' message on your SMA Inverter means there is overvoltage at the DC input. Immediately disconnect the inverter from voltage sources. Check whether the DC voltage is below the maximum input voltage of the inverter. If it is below the limit, reconnect the terminal block with the connected DC conductors to the inverter. If the DC voltage exceeds the maximum input voltage of the inverter, ensure that the PV array has been correctly rated.
R
robinsonfrederickSep 13, 2025
What does 'No update file found' mean on SMA Inverter?
- S
  smithkevinSep 13, 2025
  The message 'No update file found' on your SMA Inverter means that no new update file was found on the SD memory card. The update failed, but the inverter continues to feed in.
T
Taylor JordanSep 9, 2025
What does 'Electric arc detected > Check DC generator' mean on SMA Inverter?
- S
  Steven GreenSep 9, 2025
  The message 'Electric arc detected > Check DC generator' on your SMA Inverter indicates that the inverter has detected an electric arc. Check the PV array.
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