Purpose

This guide helps you diagnose and reduce brief grid “blips” when your battery should be powering the home. Short bursts of grid import/export are normal in grid-tied systems, but you can verify they’re expected and minimize them.

What “Grid Blips” Are

• Normal behaviour in grid-tied systems: tiny lag as the battery/inverter ramps up or down to match sudden changes in household load. The grid fills the gap briefly.
• Typically very low energy over a day (often pennies on standard tariffs).
• You may also see tiny export spikes when load drops and the battery winds down.

Symptoms You Might See

• Short red spikes of “Grid Import” during kettle/oven/iron use or when devices cycle.
• Occasional small “Export” blips after a large load turns off.
• The app/portal graph shows sharp peaks, even though the actual event lasts a second or two.

Step-By-Step Troubleshooting

1. Confirm It’s Normal Behaviour

1. Reproduce with a predictable load (e.g., 3 kW kettle):
   • Observe house load rise (e.g., from ~500 W to ~3,500–4,000 W).
   • Note a brief grid import spike; battery output then ramps to match.
2. Check daily totals:
   • Review 24-hour energy imported/exported.
   • If blips sum to < ~0.5 kWh/day and correlate with sudden load changes, this is expected.
3. Verify sampling:
   • The portal samples roughly every 0.5 s and displays 5-minute segments; short events can look visually larger on filled-area graphs.

2. Rule Out Configuration Issues

1. Operating mode:
   • Ensure “Priority House Load” / normal self-consumption mode is enabled.
   • Ensure schedules (charge/discharge windows) aren’t forcing grid use during those times.
2. EV charger settings:
   • If an EV is connected, confirm charger settings (e.g., “Prevent Battery From Discharging to EV”) and charge current aren’t causing grid priority.
3. Export limits:
   • Check any export limit or DNO constraint settings; aggressive limits can change how the inverter reacts to sudden drops.

3. Check System Capability Limits

1. Inverter output ceiling:
   • Know your inverter’s max AC power (e.g., ~3.6 kW on some models). If load exceeds this, the grid will supplement by design.
   • Test by turning on multiple high-draw appliances; note whether grid steps in when total exceeds inverter capacity.
2. Battery current/quantity:
   • Single smaller battery stacks can limit peak power. Adding packs increases available discharge power (subject to inverter limits).

4. Improve Response Time and Reduce Blips

1. Firmware update: Update inverter/battery firmware via the GivEnergy app/portal; newer firmware can shorten ramp time, reducing blips.
2. Stagger large loads: Avoid simultaneous starts (e.g., don’t run kettle and oven preheat together).
3. Prefer gentler appliances: Induction hob with a 1 kW kettle plate draws less peak power than a 3 kW electric kettle.
4. Optimize background load: Investigate devices that cycle hard (e.g., heat pumps, tumble dryers). Eco modes can soften ramps.

5. Investigate Apparent Idle Discrepancies

1. Compare “House Load” vs. “Inverter Output” overnight: Minor differences (tens of watts) can reflect inverter overhead, metering points, or sampling resolution.
2. Cross-check meters: Smart meter and GivEnergy portal measure at different points; expect small, consistent offsets.
3. If you see > ~50–80 W unexplained overnight:
   • Verify all loads truly off (standby devices add up).
   • Reboot inverter (safe restart) and confirm current firmware.
   • If persistent and large, contact support with logs/screenshots.

6. Differentiate Normal Blips from Faults

Normal:

• Brief spikes tied to sudden load changes.
• Total daily impact small; battery quickly matches load.

Potential issue:

• Prolonged grid import without large load changes.
• Frequent import when SOC is high and mode is self-consumption.
• Large sustained mismatch between house load and inverter output (hundreds of watts).

Actions:

• Review schedules/modes; update firmware; check inverter/battery status; note error codes.
• If unresolved, collect timestamps, screenshots, and event details for support.

7. Off-Grid vs. Grid-Tied Expectations

• Grid-tied “grid neutral” means occasional watts of grid input are expected as the system reacts.
• Zero grid usage requires truly off-grid operation; in that state, no dips from the grid occur, but total available power is limited by inverter/battery alone.

Quick Checks & Fixes (Cheat Sheet)

• See spikes when big loads start/stop? Expected. Reduce via firmware update + staggering loads.
• Spikes when exceeding inverter max output? Expected. Grid supplements by design.
• Graph looks alarming for a 1–2 s event? It’s a visualisation artefact of 5-minute segments.
• Daily import creeping up without clear cause? Review schedules, EV charging, and firmware; audit standby loads.

When to Contact Support

• Blips exceed ~0.5–1.0 kWh/day without obvious high-draw events.
• Persistent overnight import > ~80–100 W with verified minimal loads.
• Inverter fails to ramp to match moderate loads well below its rated output.
• Error codes, repeated reboots, or communication faults in the app/portal.

Documentation to Provide

• Date/time and appliance causing the event.
• Screenshots: house load, battery output, grid import/export, SOC.
• Firmware versions and system configuration (inverter model, battery count).
• Any EV charging settings/behaviour during events.