Forge Power Kit — 1 kVA Pure-Sine Inverter (EGS002)

Every stocked part for the Forge 1 kVA pure-sine reference design: EGS002 driver board + LCD, eight IRFP4468 bridge MOSFETs (two per switch position) with their gate parts, bulk capacitors, the isolated-feedback rectifier and trimmer, current transformer, NTC, fan with its switch transistor, +5 V regulator, fuses, XT60 and prototyping board.

Kit contents

• 1 × EGS002 EG8010 pure-sine driver board (PW-2935)
• 1 × EGS002 LCD display (PW-2613)
• 8 × IRFP4468 MOSFET, 100 V 195 A, TO-247 — two in parallel per switch position (PW-2726)
• 8 × 10 Ω gate resistor, one per MOSFET gate (CMP-1970)
• 8 × 1N4148 across each gate resistor (fast turn-off) (CMP-2046)
• 8 × 47 kΩ gate-to-source pull-down (CMP-2231)
• 12 × 1000 µF 50 V electrolytic (bridge bulk) (CMP-1944)
• 4 × FR107 fast diode (feedback sample rectifier) (CMP-2652)
• 1 × 10 kΩ preset trimmer (output-voltage setpoint) (CMP-1966)
• 2 × 10 kΩ resistor (NTC and feedback dividers) (CMP-1967)
• 1 × ZMCT103C 5 A current transformer (output over-current) (PW-2279)
• 1 × NTC thermistor 10 k MF52, B 3380 (heatsink, trips ~82 °C) (CMP-3161)
• 1 × 2N2222 fan switch + 2 kΩ base resistor (CMP-2133, CMP-2130)
• 1 × 7805 regulator (+5 V for the EGS002) (CMP-2369)
• 1 × 12 V 5015 blower fan (EM-1995)
• 1 × Fuse assortment kit (control-side) (PW-2658)
• 1 × XT60 male with 12 AWG wire (control-side battery tap) (MSC-3237)
• 1 × Dotted veroboard 12×18 cm (gate / feedback board) (PRT-2587)
• 2 × IRF3205 (ideal-diode reverse protection, paralleled) (CMP-2715)

Not included

• Transformer: 1 kVA toroid, 7.0 V : 230 V at no load (≈1 : 33), primary rated for ~160 A RMS, wound locally. Not a 12 V primary — the bridge can only deliver about 6.4–7.4 V RMS, so a 12 V primary gives ~130 V of clipped output.
• Isolated feedback: a 230 V / 9 V 1–2 VA PCB sampling transformer, or ask the winder for a 9 V feedback winding on the toroid. Do not feed VFB from a resistor divider on the 230 V output — it ties mains to battery negative.
• 150 A ANL fuse and holder, 35 mm² cable and lugs, heatsink ~150 × 100 mm, 2.2 µF X2 (275 V AC) film capacitor, case and 230 V socket.

Set the EGS002 dead time to 1.0 µs (the 300 ns default can shoot through with eight MOSFETs). For 12 V and 24 V batteries; 48 V needs 150 V MOSFETs.

The full build guide — block diagram, wiring, why-these-parts, gotchas and safety — is the pure-sine-inverter-egs002-1kva reference design in Forge: forge.microscale.net/design (ask for it by name). Print the enclosure with Forge Prototype.