> ## 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.

# Backup Not Working

> Outage comes, backup doesn't — dead backup port, overload trips, or loads that don't ride through.

export const children_0 = undefined

export const Escalate = () => <div>
    <p><strong>Escalate to Kent New Energy service only</strong> — 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.</p>
  </div>;

export const Applicability = ({labels}) => <div style={{
  border: "1px solid #0057A8",
  borderLeft: "6px solid #0057A8",
  borderRadius: "8px",
  padding: "10px 14px",
  margin: "0.75rem 0 1.25rem 0",
  background: "rgba(0, 87, 168, 0.06)",
  fontSize: "0.9em"
}}>
    <strong style={{
  color: "#0057A8",
  marginRight: "8px"
}}>Applies to:</strong>
    {labels.map(l => <span key={l} style={{
  display: "inline-block",
  border: "1px solid #0057A8",
  borderRadius: "999px",
  padding: "1px 10px",
  margin: "2px 6px 2px 0",
  background: "#ffffff",
  color: "#003F7D",
  fontWeight: 600
}}>{l}</span>)}
  </div>;

export const SITE_NAME = "Kent New Energy Knowledge Base";

<Applicability labels={["Kent G3 Hybrid Inverter", "Kent Lithium Battery"]} />

**Symptom:** the grid fails and the essential loads go dark — or the backup trips within
seconds of every outage.

<Warning>
  **For trained/authorized installers only.** Simulated-outage testing opens live breakers
  with the customer's loads attached — brief them first.
</Warning>

## Check first

1. **What was on the backup at the moment of failure?** Peak load history and the customer's
   account — one appliance too many is the leading cause.
2. **Battery state at the time** — an empty or threshold-parked bank has nothing to give;
   that branch is <a href={bndHref}>Battery Not Discharging</a>.
3. **Which device tripped** — inverter alarm, backup MCB, or an RCD? An RCD points to
   <a href={nuiHref}>Nuisance Tripping</a>.

{children_0}

## Prove the fix

Re-run the **black-start test** with the real essential loads: open the grid breaker, loads
ride through, clean return on restore, no RCD trip. 📷

## Escalate when

* Overload trips repeat with measured load inside the platform's ratings — hardware check.
* Any suspicion the Grid supply ever reached the Backup port.
* Transfer behaviour is erratic after the above causes are cleared.

<Escalate />

## Related pages

* [Backup Can & Can't](/handover/backup-can-and-cant)
* [Essential Loads](/handover/essential-loads)
* [Nuisance Tripping](/g3/troubleshooting/nuisance-tripping)