> ## Documentation Index
> Fetch the complete documentation index at: https://learning.kent.co.in/llms.txt
> Use this file to discover all available pages before exploring further.

# Kent G3 PV Wiring — Envelope, MPPTs, and Arc Rule

> 1000 V PV envelope, asymmetric 20A+40A MPPTs on 10/12 kW models, connector assembly steps, and the critical 0.5 A DC-switch arc rule.

Wiring PV into the Kent G3 starts with confirming the string voltages are inside the 1000 V envelope, landing each string on the correct MPPT, and understanding the arc-safety rule that applies every time you operate the DC switch.

<Warning>
  **DANGER — PV strings are live in daylight.** Verify string open-circuit voltage is within the platform limit and polarity matches DC+ / DC− before any connector is inserted.
</Warning>

## PV Envelope

| Parameter                   | Kent G3 10KW          | Kent G3 12KW          | Kent G3 15KW          |
| --------------------------- | --------------------- | --------------------- | --------------------- |
| Max input voltage           | 1000 V                | 1000 V                | 1000 V                |
| MPPT window (startup 160 V) | 200–850 V             | 200–850 V             | 200–850 V             |
| Full-load MPPT range        | 266–850 V             | 320–850 V             | 300–850 V             |
| MPPT input currents (Isc)   | 20 A + 40 A (30/50 A) | 20 A + 40 A (30/50 A) | 40 A + 40 A (50/50 A) |
| MPPTs / max strings         | 2 / 3                 | 2 / 3                 | 2 / 4                 |
| Max usable PV               | 16 kW                 | 19.2 kW               | 24 kW                 |

<Warning>
  **The MPPT inputs are asymmetric on the 10 kW and 12 kW models: 20 A + 40 A.** Any paralleled or high-current string **must** land on the 40 A MPPT. The string plan must name the target MPPT for every string, and commissioning must verify the assignment before energizing.
</Warning>

## Connector Assembly

<Steps>
  <Step title="Prepare the cable">
    Use approved PV cable, **4–6 mm² (12–10 AWG)**, 4 mm² recommended. Strip **7 ± 0.5 mm** — no more, no less.
  </Step>

  <Step title="Crimp the terminal">
    Crimp the metal pin with the DC crimping tool. Do not use a generic crimp — connector engagement depends on the correct pin profile.
  </Step>

  <Step title="Assemble the connector body">
    Slide nut → waterproof collar → pin into the connector body until it **clicks**. Pull gently to confirm full engagement.
  </Step>

  <Step title="Verify polarity">
    Measure the string voltage and confirm polarity with a multimeter before inserting the connector.
  </Step>

  <Step title="Insert into the inverter">
    Push the connector into the PV input until it clicks and will not pull out by hand.
  </Step>
</Steps>

## The 0.5 A DC-Switch Arc Rule

If DC inputs are reverse-connected or the inverter is faulty, **do not open the DC switch until string current is below 0.5 A**. Opening the switch above that threshold draws an arc that damages the switch contacts and voids the warranty.

<Warning>
  **Never operate the DC switch above 0.5 A string current.** Damage from wrong operation is excluded from warranty. A clip-on DC ammeter is a required tool for every Kent G3 commissioning kit.
</Warning>

<Steps>
  <Step title="Measure string current">
    Clip a DC ammeter around one string conductor and read the current.
  </Step>

  <Step title="Wait if current is above 0.5 A">
    Do not touch the switch. Wait for irradiance to fall — early morning, late afternoon, or cloudy conditions — until the reading drops below 0.5 A.
  </Step>

  <Step title="Open the DC switch">
    Only when current reads below 0.5 A, open the DC switch.
  </Step>

  <Step title="Unplug the PV strings">
    After the switch is open, unplug the PV string connectors so the array cannot re-energize the fault the next morning.
  </Step>
</Steps>

## PV DC Protection

DC reverse-polarity protection, insulation-resistance detection, and DC surge protection are built into the inverter. A DC isolator is part of the design. External DC SPD is good Kent practice on sites with high surge exposure.

## Common Mistakes

* A paralleled string landed on the 20 A MPPT of a 10 or 12 kW unit — overloads the input.
* Opening the DC switch under fault current — this is the exact arc scenario the rule prevents.
* Strings designed to 850 V at STC that exceed 1000 V open-circuit on a cold morning.
* Mixed-brand PV connectors on the supplied counterparts — engagement and IP rating are not guaranteed.

## Related Pages

* [Kent G3 Battery Wiring](/g3/battery-wiring)
* [Kent G3 Commissioning](/g3/commissioning)
* [Isolation & Shutdown](/safety/isolation-and-shutdown)