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Performance guide · GivEnergy battery

Why Is My GivEnergy System Still Using the Grid?

Brief grid import spikes with a full battery are normal in every grid-tied solar system — the inverter takes a moment to match sudden load changes and the grid fills the gap. But sustained grid use when the battery should be powering the home is a different matter. This guide helps you tell the difference and fix the genuine causes.
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  • Normal blips vs genuine sustained import explained
  • Inverter ceiling causes covered
  • Configuration and firmware fixes included
Sustained grid import that doesn't add up?

If you've checked system mode, reserve SoC and schedules and the grid use still doesn't make sense, it may be a firmware issue or hardware fault. We review the monitoring data remotely and identify the cause.

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Not affiliated with GivEnergy Ltd. Independent diagnosis and repair.

5.0
Rated 5.0 on Google Read all 48 reviews

My 90-year-old father-in-law had a solar system installed nearly three years ago that never worked properly and kept tripping out. Neither the original installer nor GivEnergy could resolve the issues, and we were even pushed towards replacing the system entirely when GivEnergy went bust. I contacted Ron at Solar Tech Support via WhatsApp, and within a few hours he had diagnosed multiple faults — including incorrect wiring that posed a potential fire risk. He carried out a home visit in Nottingham for £295 (including parts), fixed everything, completed firmware updates, and ensured the system was fully operational. Since then, it has worked perfectly. Ron was knowledgeable, responsive, and took the time to explain everything clearly. Highly recommended — excellent value and complete peace of mind.

Julian F · Jun 2026 Google

Big thanks to Ron. He was incredibly patient and helpful over the phone, taking the time to walk myself and the installer through every troubleshooting step. Through lots of testing he figured out the issue was definitely a hardware issue, which allows us to consider our next steps. Support fees are clear and they operate a “no fix no fee” policy. It is rare to find that kind of honesty combined with dedicated phone support nowadays. I highly recommend Ron, if you need help with your solar system don’t hesitate to give him a call.

Steve M · Jun 2026 Google

This company are a rare gem, I had a very unusual problem following a failed firmware upgrade on my GivEnergy kit. I then found out GivEnergy were in administration and had dismissed all their support staff! None of the usual fixes to try and restore my inverter comms would work, and I looked everywhere, forums, GivEnergy youtube support videos - even AI couldn't figure it out. My installer was talking about huge sums for system replacements, and being vague / evasive about if they'd even install replacement GivEnergy inverter. Enter Solar Tech Support, reassuring and knowledgeable from the very start, I've learnt loads about my solar system though the friendly chat while my engineer worked as he diagnosed the problem and figured out a fix procedure that I've not found anywhere else - amazing. If you need solar system repairs - especially if you like me have been left high and dry by GivEnergy, I cannot recommend this company enough. Give them a call.

Andy Thomas · Apr 2026

I sent a message on their website regarding a problem I have on my Givenergy system. Although not supplied by Ronald, I thought it was worth an email. Within the hour on a Saturday, he phoned and we discussed the problem. He logged in remotely and gave excellent advice. I'm too far away for his on-site help but he did diagnose the problem and was happy also to chat through my thoughts about an upcoming solar/battery install I'm planning. Great bloke.... if only he was nearer!

Philip · Apr 2026

A really big thank you to Ron and his team, he has vast amounts of knowledge and got my system back up and running, also good to get on with. I was absolutely lost as to know what to do, no help from installer and somehow came across Ron and am I glad I did. I would definitely definitely recommend him to anyone who has faults with there solar system, any make I would say. Thanks again Ron a pleasure meeting you.

D R · Jun 2026 Google

Ron was extremely helpful and tried his best to repair/reset our GivEnergy inverter remotely. In the event he was unsuccessful but he couldn’t have been more helpful. If you have problems with a GivEnergy system please contact him. Highly recommended

Neil Crichton · Jun 2026 Google
Overview Not Discharging Not Charging Settings Changing Tariff Lockout CAN Fault Charge Schedule App Guide Full Restart Calibration Cold Weather Grid Usage
Start here

What normal grid blips look like

✓

Short grid spikes tied to appliances are completely normal

Every grid-tied inverter has a small response lag. When a kettle or oven switches on, it takes 1–3 seconds for the battery inverter to ramp output up to match the new load. The grid fills that gap. If your spikes are brief and happen when large loads start, your system is working as designed. The energy cost is typically pennies per day.

Duration

1–3 seconds per event. Tied to specific appliance switch-on moments — kettle, oven, washing machine motor start, tumble dryer.

Daily total

Typically adds up to less than 0.5 kWh per day from blips alone. On a standard rate tariff, this is a few pence — negligible in the context of battery savings.

Graph appearance

Can look alarming on filled-area portal graphs. The portal displays 5-minute averages but samples every 0.5 seconds — a 2-second blip appears as a tall bar much larger than the actual energy used.

Why the graph looks more alarming than the reality

The GivEnergy portal samples power flow approximately every 0.5 seconds but the bar chart displays 5-minute segments. A 2-second grid import spike at 3 kW uses about 1.7 Wh of grid electricity. But the filled-area graph shows that spike as a prominently tall bar across the full 5-minute window. Always check the daily total import figure, not just the peak bar height.

Step 1
Step 1

Check Daily Totals, Not Peak Spikes

The first diagnostic step is to establish whether you're dealing with normal blips or a genuine sustained import problem. Total daily import is the key metric.

1
Open the 24-hour energy view in the GivEnergy portal

Log in to givenergy.cloud, select your inverter, and open the daily energy summary. This shows totals for solar generated, battery charged, battery discharged, grid imported and grid exported for the day in kWh.

2
Check the total grid import figure

Under 0.5 kWh/day of grid import that correlates with appliance use is expected. If you're seeing 1–2 kWh/day or more without obvious high-draw events, or if import is occurring in the early hours when consumption should be minimal, there's a genuine issue to investigate.

3
Reproduce a blip deliberately to confirm it's normal

Boil a full kettle while watching the portal power graph. You should see house load spike, with a brief grid import spike immediately followed by the battery output ramping to match. The grid spike should disappear within a few seconds. If it does, the system is behaving correctly.

✓ Normal — no action needed

• Brief spikes (1–3s) when large appliances switch on
• Total daily import under 0.5 kWh
• Battery output ramps to match load within seconds
• Small export blips when large loads switch off
• Grid usage only during scheduled charge windows

Worth investigating

• Total daily import above 0.5–1 kWh without obvious cause
• Sustained import lasting minutes, not seconds
• Overnight import above ~80–100 W with minimal loads
• Grid use during daytime when battery is charged and sun is out
• Import not correlating with any identifiable load event
Cause 1
Cause 1

Your Load Exceeds the Inverter's Output Ceiling

Every inverter has a maximum AC output rating. If your household's total load exceeds this ceiling — even briefly — the grid supplements the difference. This is by design, not a fault.

Common GivEnergy inverter output ratings

Hybrid 3.6 kW

Gen 1 and some Gen 2 models. Running a 3 kW kettle plus 1 kW background load exceeds this rating — grid import for the duration of boiling is expected.

Hybrid 5.0 kW

More headroom — can handle a 3 kW kettle with up to 2 kW of other loads before hitting the ceiling. Peak events like oven + kettle simultaneously may still exceed it briefly.

AIO systems

AIO models typically have a 3.6 kW ceiling. Adding expansion batteries increases storage capacity but does not increase the AC output rating.

Check your inverter's exact model label (on the unit) and look up the rated AC output in its datasheet. If your typical peak load regularly exceeds this, the grid import during those peaks is unavoidable without upgrading to a higher-rated inverter.

Cause 2
Cause 2

Configuration Issues Causing Sustained Grid Use

If the grid import is sustained (lasting minutes) or unexpected (no large load switch), a configuration cause is most likely. Check these in order.

System mode not set to self-consumption

In the GivEnergy app or portal, check Settings → System Mode. For the battery to power the home, the mode should be set to Priority House Load or the equivalent self-consumption mode. If the mode has been changed to export-priority or a manual mode that prevents discharge during certain hours, the system will draw from the grid instead.

Fix: Set mode to Priority House Load / self-consumption. Confirm it hasn't been overridden by a smart tariff API — see our settings keep changing guide.

Reserve SoC set too high

The Reserve SoC is the minimum the battery will discharge to. If it's set to 50%, the battery only uses the top half of its capacity before switching to grid. Check Settings → Battery Reserve. A common oversight is an installer setting a high reserve during commissioning and never updating it.

Fix: Set Reserve SoC to 10–20% for most households, unless you have a specific need for a higher backup reserve.

Timed discharge schedule has ended or is misconfigured

If you use timed discharge (setting specific windows when the battery powers the home), check that the schedule end time hasn't passed. A battery that is set to discharge only between 17:00 and 22:00 will draw from the grid outside that window even if it's full.

Fix: Review all active schedules in the portal. For self-consumption without smart tariff features, Priority House Load mode is simpler and more reliable than manual timed discharge.

EV charger settings preventing battery discharge

If an EV charger is connected, check its settings — some configurations include a "prevent battery from discharging to EV" option, or a charge current limit that forces grid use.

Fix: Review GivEnergy EV charger settings, particularly any options about battery use and grid preference during vehicle charging.

Export limit or DNO constraint too aggressive

If a strict export limit has been set (e.g. 0 kW export), the inverter may throttle battery output in situations where it would otherwise have exported briefly — this can cause it to lag slightly more on load ramp-up events, increasing blip frequency.

Fix: Check Settings → Export Limit. Most residential installations can allow 3–5 kW export without issue. If a DNO constraint applies, contact your installer before changing this setting.
Cause 3
Cause 3

Persistent Overnight Grid Import

Some overnight grid import is expected if you are in a scheduled charge window. But sustained import outside of charge windows when the battery is charged is not normal. A consistently high overnight baseline above 80–100 W with minimal loads is worth investigating.

1
Compare House Load vs Inverter Output overnight

In the portal Power graph, overlay both House Load and Inverter Output (battery discharge) overnight. Minor differences of 10–30 W are normal due to inverter overhead and meter measurement at different circuit points. A consistent gap of 50–80 W or more that can't be explained by standby loads suggests a metering or configuration issue.

2
Audit standby loads — they add up quickly

Modern homes often have significant standby consumption — set-top boxes, gaming consoles on standby, routers, smart speakers, NAS drives, and always-on appliances can easily total 80–150 W overnight. This is real consumption, not a system fault. Check by turning circuits off at the consumer unit temporarily and watching the House Load reading.

3
Perform a safe system restart if overnight import is unexplained

If the battery is charged, system mode is correct, and no obvious loads explain overnight import, a full restart often resolves the issue. See our full restart guide for the correct sequence.

4
Update firmware if the restart doesn't resolve it

GivEnergy firmware updates shorten inverter response time and fix known issues with grid-tie management. Update via the app (Settings → Firmware Update) when the system is idle. After updating, monitor for 48 hours to see if the overnight import reduces.

Reduce blips

Practical steps to reduce grid blips

Update inverter firmware

Newer firmware versions shorten the inverter's ramp-up time — reducing the duration and amplitude of grid blips. Update via the GivEnergy app when the system is idle. Check the firmware version in Settings → System Information first.

Stagger high-draw appliances

Avoid starting the kettle and oven at the same time. Most appliances that cause blips are large resistive loads (kettle, oven elements, iron) — their switch-on is instantaneous. Staggering them by even 30 seconds reduces peak draw significantly.

Check inverter sizing

If grid blips are frequent and your peak load regularly exceeds your inverter's rated output, the only technical fix is upgrading to a higher-rated inverter. This is a significant decision — a cost comparison of grid import cost vs upgrade cost is worth doing first.

Accept the small cost

The energy cost of normal blips is typically 2–5 pence per day. Over a year that's under £20. In most cases the cost of reducing blips further vastly outweighs the grid cost. Blips are often better accepted than engineered away.

When to call STS

When to contact STS

Investigate with STS if:

• Total daily import exceeds 0.5–1 kWh without obvious high-draw events
• Overnight import above 80–100 W with confirmed minimal standby loads
• Inverter fails to ramp to match moderate loads well below its rated output
• Error codes or repeated reboots appear in the event log
• Restart and firmware update have not resolved sustained import

Normal — you can handle this:

• Brief spikes (1–3s) when kettle or oven switch on
• Total daily import under 0.5 kWh
• Grid use during scheduled charge window
• Small export blips when large loads switch off
• Overnight import explained by audited standby loads
Related guides

Related GivEnergy guides

Problem

Battery Not Discharging

If the battery isn't contributing at all — not just blips but no discharge — these are the likely causes

 Problem

Settings Keep Changing

Smart tariff APIs that override system mode can cause unexpected grid use — find out if that's happening here

 Configuration

Charge Schedule Setup

Configure charge and discharge windows correctly so the battery powers the home when it should

 Setup

Full Restart Procedure

Safe restart sequence for when a reboot is needed to resolve persistent grid behaviour

 Setup

GivEnergy App Guide

Reading House Load, grid import/export graphs and event logs to diagnose grid usage patterns

 GivEnergy

GivEnergy Hub

All GivEnergy guides, fault fixes and configuration help in one place
Export limit issues — all brands
Related GivEnergy pages
CT Clamp Direction

Correct CT sensor orientation and setup
Charge Schedule

Setting up timed charge and discharge windows
Tariff Optimisation

Maximise savings with dynamic tariff rates
All GivEnergy Problems

Complete problem-solving guide index
FAQ

Frequently asked questions

Brief grid imports with a full battery are almost always caused by inverter response lag — the 1–3 seconds it takes the battery inverter to ramp up output when a large load switches on. This is normal in all grid-tied systems. If the spikes are brief and correlate with large appliances starting (kettle, oven, EV charger), the system is working as designed. Sustained grid import — lasting minutes rather than seconds — with a charged battery is different and suggests a configuration or hardware issue. Check system mode, Reserve SoC, and discharge schedule in the app.
The portal samples power flow approximately every 0.5 seconds but the filled-area bar chart displays 5-minute segments. A 2-second grid blip at 3 kW uses about 1.7 Wh of grid electricity — but it appears as a tall bar across the full 5-minute window, making the visual alarm much worse than the actual cost. To check what's really happening, look at the total daily grid import figure in kWh rather than the peak height of individual spikes. If the total is small and correlates with appliance use, the system is normal.
Persistent overnight import with a full battery is not normal blip behaviour and is worth investigating. The most common causes: a timed discharge schedule that ended earlier in the evening; a Reserve SoC set too high (e.g. 50%) meaning the battery can barely discharge; system mode not set to self-consumption; or EV charger settings preventing battery discharge to the charger. Also audit standby loads — set-top boxes, consoles and always-on devices can add 80–150 W of genuine consumption overnight. Check these before concluding there's a hardware fault.
True zero grid usage requires fully off-grid operation — without a grid connection, the inverter manages all loads from solar and battery alone, with no grid blips possible. In grid-tied mode, occasional small imports are expected as the inverter reacts to load changes. "Grid neutral" means near-zero import over the day, not zero at every second. You can minimise blips by updating firmware and staggering large loads, but brief 1–3 second imports during load ramp events are unavoidable in grid-tied systems — and cost only pennies per day.
The remote diagnostic is free — send us your daily grid-import figures and when it happens, and we'll review your monitoring data at no charge, including whether it's just normal ramp-up blips or genuine sustained import. If it turns out to be something we can fix remotely — a discharge schedule, a Reserve SoC set too high, the wrong system mode, or a firmware update to shorten the inverter's ramp time — that's a flat £75, and if we can't fix it remotely there's nothing to pay. This is monitoring and settings work, so it almost never needs a site visit. Full pricing →
Usually the same day. Most grid-usage questions come down to reading the monitoring data — and very often the answer is that brief second-long blips are normal and costing only pennies, which we can confirm quickly so you're not chasing a fault that isn't there. If it's a genuine settings issue like an ended discharge schedule or a high Reserve SoC, we correct it remotely in the same session and you'll see the difference on the next day's import figures.
Get help

Sustained grid import that doesn't add up?

If you've checked system mode, Reserve SoC, schedules and standby loads and the grid use still doesn't make sense — it may be a firmware issue or hardware fault that needs a diagnostic. Tell us what you're seeing and we'll help narrow it down.

  • Not affiliated with GivEnergy Ltd
  • Free remote diagnostic — pay only if we fix it
  • Grid usage issues usually diagnosed remotely without a visit

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