The One-Week Resilient Home Challenge: What Would You Discover?
The One-Week Resilient Home Challenge: What Would You Discover?
Resilience isn't about preparing for the end of the world. It's about discovering how dependent your ordinary world has become.
Imagine that, for the next seven days, you deliberately tried to reduce your dependence on everything coming into your home.
Not completely. This isn't a suggestion that you switch off the mains electricity, turn off the water supply or put yourself in danger.
Instead, imagine a controlled experiment.
For one week, you behave as though electricity, water, food deliveries, internet access and other services might become unreliable. You find out what you already have, what you actually need and what would become a problem surprisingly quickly.
Could you feed everyone?
Could you cook?
Could you keep warm?
How much water would you need?
Could you keep the fridge and freezer running?
Could you charge your phones?
Could you receive news and emergency information?
And if you have solar panels and batteries, how independent would they actually make you?
I suspect many households would discover something interesting.
They are simultaneously more resilient and less resilient than they think.
This Is an Audit, Not a Survival Exercise
I would not recommend deliberately disconnecting essential services for seven days simply to see what happens.
There is no merit in making your family cold, risking food in the freezer or discovering that somebody's essential medical equipment doesn't work without electricity.
Instead, run the challenge on paper and, where sensible, simulate parts of it safely.
For seven days, keep records.
Every time you use something that depends upon an external supply, notice it.
Turn on a light? Electricity.
Flush the toilet? Mains water.
Make a cup of tea? Electricity or gas, plus water.
Open the fridge? Electricity.
Check the weather forecast? Internet, electricity and telecommunications infrastructure.
Cook dinner? Energy, water and food supplies.
Drive somewhere? Fuel or electricity.
Order something online? An enormous network of systems working invisibly behind the screen.
The challenge isn't about stopping all these things.
It is about noticing them.
Day 1 — How Much Electricity Do You Really Need?
Start with electricity.
Most of us don't think in kilowatt-hours. We think in appliances.
The kettle works.
The lights come on.
The washing machine runs.
The television works.
But household resilience becomes much easier to understand when you divide electricity use into three groups.
Essential
These might include:
fridge and freezer;
a few lights;
broadband router;
phones;
heating controls and pumps;
essential medical equipment;
perhaps security equipment.
Useful but negotiable
Perhaps:
television;
computers;
microwave;
washing machine;
dishwasher;
vacuum cleaner.
High consumption or easily postponed
Depending upon the household:
tumble dryer;
electric oven;
immersion heater;
electric shower;
EV charging;
hot tub;
whole-house electric heating.
The interesting question isn't:
"Can my battery run my house?"
It is:
"What do I actually need my battery to run?"
Those are very different questions.
I have around 50 kWh of home battery storage, which sounds enormous compared with many domestic installations.
But even 50 kWh is not an infinite electricity supply.
In winter, particularly after several poor solar days, those batteries could already be substantially depleted when a power cut begins.
That is one of the lessons of resilience: capacity on paper isn't necessarily capacity available when you need it.
Day 2 — What Would Your Solar Panels Actually Do?
If you have solar panels, try another thought experiment.
It is midday.
The sun is shining.
There is a power cut.
What happens?
Many solar owners may be surprised to discover that a conventional grid-connected solar installation shuts down during a grid failure. This is an essential safety feature intended to prevent electricity being exported into lines that engineers may be working on.
So having solar panels doesn't automatically mean having electricity during a blackout.
A properly designed backup system may be able to isolate the house from the grid and continue supplying selected circuits from batteries and, depending on its design, solar generation.
But you need to know what your system does.
That makes this an excellent task for the resilience week:
Find out how your solar and battery installation behaves during a grid failure.
Which circuits remain powered?
What is the maximum backup load?
Can the solar panels recharge the batteries while the grid is unavailable?
What happens if the battery reaches its minimum state of charge?
Do you have to operate anything manually?
Don't wait for a real power cut to start searching for the instruction manual.
Day 3 — Could You Eat for a Week Without Shopping?
Now move away from energy.
Don't buy any food today.
Instead, look at what you already have.
Cupboards, freezer, fridge, tins, packets, jars, pasta, rice, flour, oats, cereals, frozen vegetables, bread and leftovers.
Could you create seven days of sensible meals?
This can be surprisingly revealing.
Some households may discover that they have enough calories for weeks but very little variety.
Others may have an impressive freezer full of food but discover that almost everything needs electricity to store and electricity to cook.
And there is another possibility.
You may discover food you had forgotten you owned.
That tin at the back of the cupboard.
Three bags of pasta.
Frozen portions whose labels disappeared sometime around 2023.
Resilience can therefore overlap with reducing food waste.
The aim isn't necessarily to build an enormous emergency food store.
It is to maintain a sensible rotating stock of foods that you genuinely eat.
Use them.
Replace them.
Rotate them.
That is much better than buying a box marked "emergency supplies" and discovering five years later that nobody likes its contents.
Day 4 — Water: The Resource We Assume Will Always Be There
Now try one of the most revealing exercises.
For a single day, record approximately how much water your household uses.
Not just drinking water.
Think about:
tea and coffee;
cooking;
washing;
showering;
toilets;
washing clothes;
washing dishes;
pets;
cleaning.
Suddenly, storing a few bottles of water doesn't look like complete water resilience.
There is also an important distinction between drinking water and utility water.
Clean stored drinking water is one issue.
Water for flushing a toilet or watering plants is another.
Rainwater storage can help with some non-potable uses, particularly in the garden, although it should not automatically be regarded as safe drinking water.
The exercise also demonstrates how extraordinarily convenient mains water is.
We turn a tap and expect clean water to appear immediately.
That convenience makes it almost invisible — until it stops.
Day 5 — Could You Cook If Your Normal Cooker Didn't Work?
This is where food and energy resilience meet.
Suppose you have plenty of dried pasta.
Excellent.
Now suppose you cannot boil water.
Your food stock suddenly becomes considerably less useful.
Look around your kitchen and identify which cooking methods depend upon which energy source.
If everything is electric, a power cut affects everything.
If you have battery backup, can it support your hob or oven?
A 3 kW kettle used for a few minutes is one thing.
Running a large electric oven for an hour is quite another.
A microwave can sometimes be surprisingly useful because it cooks quickly, although its instantaneous power demand still matters.
The lesson is simple:
Emergency food should be considered alongside the means of preparing it.
A cupboard full of ingredients isn't quite the same thing as a cupboard full of meals.
Day 6 — Could You Keep Warm?
This question becomes much more serious in January than July.
My own home uses a heat pump, so although the heating is extremely efficient compared with direct electrical resistance heating, it still needs electricity.
It also needs pumps, controls and the rest of the heating system to operate.
A house with a gas boiler isn't necessarily independent of electricity either. Modern boilers normally require electrical controls, pumps and ignition.
So ask:
What would happen to my house after 6, 12, 24 or 48 hours without normal heating?
This is where insulation becomes a resilience measure as well as an energy-saving measure.
A well-insulated home loses heat more slowly.
Curtains help.
Closing doors helps.
Concentrating activity in fewer rooms can help.
Warm clothing helps enormously.
Instead of asking only:
"How can I continue heating the entire house normally?"
a better resilience question may be:
"How can I keep the people sufficiently warm while using much less energy?"
Sometimes the most efficient thing to heat is the person rather than the entire building.
Day 7 — Communication, Information and All the Things We Forgot
By the seventh day, consider the things that aren't immediately obvious.
Suppose the electricity fails.
Your mobile phone works.
Excellent.
Until its battery becomes flat.
You have a power bank.
Excellent.
Until that becomes flat.
Perhaps you can recharge it from your home battery or car.
But what about your internet router?
And does the wider broadband network continue operating?
Mobile networks have backup systems, but widespread or prolonged outages can still affect communications.
A small battery radio can therefore seem remarkably old-fashioned — right up until the moment when it becomes extremely useful.
Then consider other easily forgotten dependencies.
Electric gates.
Garage doors.
Security systems.
Electric cooking.
Electric showers.
Sewage pumps.
Aquarium equipment.
Medical devices.
Smart-home controls.
Cloud-based information.
Even the humble tin opener.
A cupboard full of tinned food becomes considerably less impressive if your only opener is electric.
Keep a "What Failed?" List
Throughout the week, keep one particularly useful list.
Every time you encounter something that would cause difficulty during a disruption, write it down.
Not as a disaster.
As a problem to solve.
For example:
Problem: We couldn't cook if the electricity failed.
Possible improvement: Identify a safe alternative cooking method.
Problem: Nobody knows what the battery system does during a blackout.
Possible improvement: Read the instructions and ask the installer.
Problem: We have food but no organised stock rotation.
Possible improvement: Create a simple oldest-at-the-front system.
Problem: Our torches all use different batteries.
Possible improvement: Standardise where practical and keep charged rechargeable batteries available.
Problem: We have several power banks but none are charged.
Possible improvement: Add them to a monthly charging routine.
That is resilience becoming practical.
Try a Low-Energy Day
One of the most interesting experiments would be to choose one day during the week and deliberately minimise electricity use.
Don't switch off anything essential.
Instead, challenge yourself.
Can you reduce consumption to the fridge, freezer, router, essential equipment, a few lights and modest cooking?
Watch your smart meter or energy-monitoring system.
You may discover that the household can function surprisingly comfortably on much less electricity than normal.
That information becomes extremely useful if you have battery backup.
If normal consumption is 20 kWh per day but you discover that an emergency mode requires only 5 kWh, a battery suddenly lasts very differently.
Resilience is therefore not simply about buying more capacity.
It is also about reducing demand intelligently when circumstances require it.
Try a No-Shopping Day — Then a No-Shopping Weekend
Food offers another safe experiment.
Don't go shopping.
Don't order a takeaway.
Don't arrange a supermarket delivery.
Simply eat from what you already have.
Start with one day.
Then try a weekend.
You may discover that you have far more food than you imagined.
More importantly, you begin identifying the gaps.
Perhaps you have plenty of pasta but little protein.
Plenty of frozen food but nothing that can be eaten without cooking.
Twenty tins of food but no manual tin opener.
Plenty of tea but only enough long-life milk for tomorrow morning.
These are inexpensive weaknesses to fix.
Don't Forget Other People
There is another dimension to resilience that can easily disappear beneath batteries, solar panels and tins of beans.
People.
Who nearby might need help?
An elderly neighbour?
Someone with limited mobility?
A household with a young baby?
Someone whose medical equipment depends upon electricity?
Conversely, who might be able to help you?
Resilience doesn't have to mean every household becoming a self-contained fortress.
A resilient street or community may be far more effective than twenty isolated households.
One neighbour has tools.
Another has practical skills.
Someone has a battery system.
Someone else has a camping stove.
Another person knows how to fix things.
Perhaps the most valuable resilience technology is simply knowing your neighbours.
What Would My Own House Teach Me?
My home is probably considerably more resilient electrically than the average UK property.
I have 26 solar panels across three arrays, substantial battery storage and an all-electric home.
But that doesn't mean I can ignore resilience.
Quite the opposite.
Because almost everything is electric, electricity becomes particularly important.
The heat pump needs it.
Cooking needs it.
Communications need it.
The fridge and freezer need it.
And during winter, solar generation can be dramatically lower just when heating demand is greatest.
My 50 kWh battery capacity might look enormous on a specification sheet.
But the more useful question is:
How much energy is actually in those batteries at the instant the grid fails?
If they are nearly full, the situation is very different from a winter evening when they are already approaching their lower limit.
That is precisely why I find this subject interesting.
Technology can make a home more resilient.
But understanding how that technology behaves can be even more important than owning it.
Your Seven-Day Resilience Scorecard
At the end of the week, don't give yourself a score out of 100.
Instead, answer seven questions:
Electricity: What is our realistic minimum daily electricity requirement?
Food: How many days could we eat reasonably well without shopping?
Water: What water do we have available if the mains supply is interrupted?
Cooking: Could we safely prepare food without our normal cooking system?
Warmth: How would we keep people warm if normal heating were unavailable?
Communication: How would we charge phones and obtain information?
Knowledge: Does everyone in the household know what to do?
That final question may be the most important.
Equipment that nobody knows how to use isn't much of a resilience plan.
Don't Buy Anything Until You Have Finished the Challenge
This may be the most important rule.
Don't begin by shopping.
It is very easy for resilience to become another consumer industry.
Buy this battery.
Buy this generator.
Buy this emergency food box.
Buy this water filter.
Buy this solar gadget.
Some equipment may be extremely useful.
But first discover the problem you are trying to solve.
You might find that your first improvements cost almost nothing:
charge the existing power banks;
find the battery-system instructions;
label the freezer;
rotate the cupboard food;
locate the stopcock;
check the torches;
find the manual tin opener;
write important telephone numbers on paper;
talk to a neighbour.
Resilience isn't necessarily about owning more.
Sometimes it is about understanding what you already have.
The Real Purpose of the Challenge
The One-Week Resilient Home Challenge isn't asking:
"Could I survive the collapse of civilisation?"
That isn't a particularly useful question for most of us.
Ask instead:
"Could my household cope comfortably with an inconvenient week?"
A storm.
A prolonged power cut.
A water-supply problem.
Severe weather.
A transport disruption.
A temporary shortage.
An unexpected period when leaving home becomes difficult.
The objective isn't fear.
It is confidence.
At the end of seven days, you should understand your home better than you did at the beginning.
You should know what consumes electricity.
You should know what food you have.
You should know where your water comes from.
You should know what your solar panels and batteries can — and cannot — do.
You should know how you would keep warm.
And, perhaps most importantly, you should have discovered the handful of small weaknesses that could be corrected before they ever become real problems.
A resilient home isn't a house prepared for the end of the world.
It is a home better prepared for the ordinary world occasionally going wrong.
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