• Layers: 4L
• Thickness: 2mm
• Size: 264mm x 412mm + 15mm (BAT TERM)

Considering the time it takes to manufacture and assemble, the board is very new.

30210300000752

2024-07-11

High-current PCB welding terminals M6 for battery connection 

Similar part: TM68160200-1300

• PCB Soldering Terminal
• M6
• 240A

Bottom tracks of battery inputs has no mask to increase current capacity.

Transistors manually soldered on the bottom side.

Sime holes plated and electrically connected to the transformer board using screws.

ZMCT118A

Pretty common current transformer (CT).

1. First on the solar side (between transformer and transistors).
2. Second on the inverter side.

Specs:

• 5A (Rated)
• 2.5mA
• 2000:1
• (Need external burden resistor).

MKP63 300~Y2 472 M 40/110/56/B

In series and between PV- and PV1+/PV2+

2.0uF 10% 40/95/56 SH C3D 800VDC

Connection between PV (solar) positive and negative (after filter)

• LCR: C=1.930uF@1kHz

1.5uF 1000V (155K 1000 C3H)

Two in parallel:

Connected in series with HV winding of IGBT switch (resonance capacitor)

• LCR: C=2.900uF@120Hz

Current Sensor for each PV Input

L18P025D15 TAMURA

• 25A
• 15V
• 0 Hz to 100 kHz
• Response time: 5us
• Primary wire: 1.6mm
• Rated output voltage: 4V
• Power supply: 15V

L18P025D15.pdf

LV SIDE ISO DRIVERS

Battery Side (LV — Low Voltage) Isolated Transistor Drivers

LTV-5341-TP1

• 15V to 30V VCC
• 3A (Peak)
• 150ns (Propagation Delay)
• SOP-5-300mil

Driver's input have high-frequency filter:

• 10nF 0805
• 100 Ohm 0805

• Fast-discharge diode not installed (DNP)
• Capacitor 10uF 1210 used as local fast energy source for powering driver; Second capacitor not installed (DNP)
• Resistor 1 Ohm 1210 connected between driver output and transistor's gate
• E1DF diode connected in series to power (30A 35ns 200V 1V@1A 1A SMAF(DO-214AD) )

Additionally, to provide stable voltage during current spikes drivers have (before diode): 

• Electrolytic capacitor 470uF 35V
• Ceramic capacitor ~0.1uF 1206

HV SIDE ISO DRIVERS

Solar Side (HV — High Voltage) Isolated Transistor Drivers

TLP5754(TP,E(T

• 15V to 30V VCC
• 4A (Peak)
• 150ns (Propagation Delay)
• SOIC-6-300mil

Driver's input have high-frequency filter:

• 10nF 0805
• 100 Ohm 0805

• S24 fast-discharge diode (40V; 2A; SBD)
• Capacitor 10uF 1210 used as local fast energy source for powering driver; Second capacitor not installed (DNP)
• Resistor 10 Ohm 1210 connected between driver output and transistor's gate

Different drivers use different diodes for powering:

• HS1M diode connected in series to power (1000V; 1A; 75ns) (TOP IGBT)
• CRXL02D120G2 (1200 V; 2A; 11.2 nC) (BOT IGBT)

Additionally HV (Solar) Side have snubber circuit (Two resistors 2512 200 Ohm in parallel (100 Ohm Total) and Capacitors 200nF 1206 in series) between COLLECTOR AND EMITTER

2200uF 63V Electrolytic Capacitors at battery inputs

11PCS in parallel = 2200uF*11=24.2mF

Low Voltage (Battery) Side Transistors (8PCS)

• CRMICRO
• CRSQ027N10NZ 4CAE4023-3
• N-MOSFET 100V; 180A; 2.6mOhm
• Qg=169 nC
• Ciss=11355 pF
• TO-247

Because inverter designed for 48V (16S), so 100V FET's are fine

CRSQ027N10NZ_NFET_Datasheet.pdf

High Voltage (Solar) Side Transistors (4PCS)

• CRMICRO
• CRG40T120AK3SD GLCF8P2
• IGBT 1200V; 40A; 333W
• Vce=1.9V
• TO-247

CRG40T120AK3SD_IGBT_Datasheet.pdf

Transistors of Inverter (8PCS)

Transistors of Boost converter (1PCS/PV BOOST)

with diodes (1PCS/PV BOOST)

NCE40TS120VTP CBRU2

60T65PES SF58506GE

Diodes of the PV BOOST

• CRXU20D065G2 GLCDMAVG
• Silicon Carbide Schottky Diode (SBD)
• 650V; 20A; 56nC
• TO-247-2

CRXU20D065G2_SBD_Datasheet.pdf

• 2L
• xmm
• Top side
• Size:

Considering the time it takes to manufacture and assemble, the board is very new.

30210300000660

2024-02-29

TMS320F28335 Real-Time Microcontroller (Primary MCU)

• 150MHz
• 256K × 16 flash, 34K × 16 SARAM
• 12-bit ADC, 16CH, 80-ns conversion rate
• Up to 18 PWM outputs
• Up to 6 HRPWM outputs with 150-ps MEP resolution

TMS320F2802 Digital Signal Processors (Secondary MCU)

• 100 MHz
• 32K × 16 flash, 6K × 16 SARAM
• 12-bit ADC, 16CH, 160-ns conversion rate
• Up to 16 PWM outputs
• Up to 6 HRPWM outputs

SNx4ACT14 Hex Schmitt-Trigger Invert

• VCC is optimized at 5V
• Allows up voltage translation from 3.3V to 5V

6N137 High Speed Optocoupler

• Single Channel
• High speed: 10 MBd typical
• +5 V CMOS compatibility
• Open drain NMOS-transistor output

NSi1050 Isolated CAN Transceiver

• VDD1: 2.5V to 5.5V
• VDD2: 4.5V to 5.5V
• Date rate: up to 1Mbps

NSI83085E High Reliability Isolated Half and Full-Duplex RS-485 Transceivers

• Bus side power supply voltage: 3.0V to 5.5V
• VDD1 supply voltage: 2.5V to 5.5V
• Data rate: up to 16Mbps.

BJT

• Indicator LED 1206 (Reverse Mount)
• Debug JTAG connector (02x07 2.54mm Pin Header)

• Layers: 2L
• Thickness: 1.3mm (or imprecise measurement)
• Size: 164mm x 110mm x 58.6mm
• Description: Boar has powerful AC terminals for GRID, LOAD, GEN. Low voltage spring clamps terminal. RJ45 connectors for interfacing.

Four relays controlling two lines, so it able to connect/disconnect both N and L

Two relays connected in series for reliability (if one relay fails, the second one will remain)

Relay ZETTLER AZSR143-1AE-12D

• 50A 277VAC; 40A 480VAC
• SPST-NO
• Coil: 12V; 1.6W
• 
• AZSR143-1AE-12D.pdf

All Coils connected to one control signal?

A554 — PNP BJT

Solar Input Capacitors

1000uF 315V AISHI

• D=36mm; H=45mm; P=10mm
• 4 in series to have 315V*2=630V
• Total capacity: 8000uF/2=4000uF

LCR: 1.94mF@120Hz

Capacitor: V3D 600VDC 5.0uF 10% 40/85/56 (31.5x12.7x21.5 P27.5mm)

Inductor: ES5884 33mm x 23mm x 15mm

LCR:

1. 6.004mH@1kHz Rs: 6.994Ohm Q:5.3940
2. 5.990mH@1kHz Rs: 6.859Ohm Q:4.5869
3. 6.102mH Rs: 7.748Ohm Q:4.9488
4. 6.118mH R: 5.519Ohm Q:7.3946

LCR: 9.890uF@120Hz (5uF connect in parallel through coils)