> ## 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 M1 AC Wiring — GRID, GEN, and BACKUP Connections

> Cable sizes, 1.2 N·m torque rule, breaker schedule, grid-input sizing trap, and backup current limits for all three Kent M1 models.

The Kent M1 has three AC connections — GRID, GEN, and BACKUP — with L, N, and PE marked inside each connector. The cables, torque, and breakers differ by model and by port. The single most common sizing mistake on this platform is sizing the grid cable to output watts instead of input current — this page explains why, and gives you the correct figures.

<Warning>
  **For trained and authorised installers only.** Verify all AC sources are isolated and proven dead before touching terminals.
</Warning>

## Before you start

* Identify and label both the grid run and the backup run at both ends before wiring. The backup loads panel is never electrically tied to the main panel.
* Every inverter gets its **own dedicated AC protection switch** — never shared between units. No load may sit between the inverter and its AC breaker.

## Cables and torque

| Port   | Kent M1 3KW    | Kent M1 5KW / 6KW | Torque      |
| ------ | -------------- | ----------------- | ----------- |
| GRID   | 6 mm² (10 AWG) | 10 mm² (8 AWG)    | **1.2 N·m** |
| GEN    | 6 mm²          | 6 mm²             | **1.2 N·m** |
| BACKUP | 4 mm² (12 AWG) | 6 mm²             | **1.2 N·m** |

Cable OD ranges: GRID Φ11–16 mm (3 kW) / Φ13–18 mm (5–6 kW); GEN and BACKUP Φ10–15 mm.

Strip to the connector gauge and land the full core. No exposed copper must remain outside the terminal, and no strands must be left out — loose strands inside a terminal cause heating and destroy inverters over time.

<Warning>
  **1.2 N·m is this platform's AC torque — it is deliberately low.** These are compact connectors. Crews arriving from other Kent platforms must not carry their torque habit from that platform to this one. Overtorquing cracks connectors. Check the [Mixed-Fleet Cheat Card](/mixed-fleet/cheat-card) if your crew works across platforms.
</Warning>

**Wiring order:** connect the **GRID and GEN PE first**, then L and N. The BACKUP PE must be grounded — see [Earthing & RCD](/m1/earthing-and-rcd). Fit every AC connector's waterproof cover after wiring is complete.

## The grid-input sizing trap

Grid-side cable and breaker are sized to the **input** figures, not the output rating. The grid also charges the battery, so grid-side apparent power and current are significantly higher than output watts suggest:

| Model       | Grid-side max apparent power | Grid-side max input current |
| ----------- | ---------------------------- | --------------------------- |
| Kent M1 3KW | 6000 VA                      | **27.3 A**                  |
| Kent M1 5KW | 10000 VA                     | **43.0 A**                  |
| Kent M1 6KW | 10000 VA                     | **43.0 A**                  |

Sizing a 5 kW site from "5 kW output" undersizes the grid cable and breaker by almost half.

## Breaker schedule

Use this table for every Kent M1 installation:

| Breaker                | Kent M1 3KW                               | Kent M1 5KW         | Kent M1 6KW         |
| ---------------------- | ----------------------------------------- | ------------------- | ------------------- |
| Grid AC                | ≥ 40 A / ≥ 230 V                          | ≥ 63 A / ≥ 230 V    | ≥ 63 A / ≥ 230 V    |
| Backup AC              | ≥ 40 A class, sized to actual backup load | same                | same                |
| PV DC                  | ≥ 32 A / ≥ 500 V                          | same                | same                |
| Battery DC (mandatory) | ≥ 90 A / ≥ 60 V DC                        | ≥ 160 A / ≥ 60 V DC | ≥ 180 A / ≥ 60 V DC |

## Backup honesty

Backup output is model-specific — do not promise a number higher than the installed model's rating:

| Model       | Max backup current | Max backup VA |
| ----------- | ------------------ | ------------- |
| Kent M1 3KW | **15 A**           | 3300 VA       |
| Kent M1 5KW | **25 A**           | 5500 VA       |
| Kent M1 6KW | **30 A**           | 6600 VA       |

<Warning>
  **Pending Kent validation — do not configure in the field.** \[KNB-VAL-02]
  Backup surge capacity for the Kent M1 is under confirmation. Until published here, size backup loads to rated power only (3300 / 5500 / 6600 VA) and do not promise motor-start headroom to the customer.
</Warning>

## Common mistakes

* Grid supply landed on the BACKUP port — this destroys the internal transfer switch.
* Grid cable and breaker sized to output kW instead of the 27.3 A / 43 A input figures.
* A single "solar breaker" shared between two inverters.
* Over-torqued AC connectors cracked by habit from higher-torque platforms — 1.2 N·m is the limit here.

## When to escalate

Escalate to Kent New Energy service only — through your registered Kent partner channel or the Kent service desk details on your work order. Do not contact any third-party or component-manufacturer support line for a Kent-branded system: tickets outside the Kent channel are not tracked, not covered, and can void warranty handling.

## Related pages

* [Kent M1 Earthing & RCD](/m1/earthing-and-rcd)
* [Kent M1 GEN Port](/m1/gen-port)
* [Mixed-Fleet Cheat Card](/mixed-fleet/cheat-card)