JTBD case study, solar: four buying jobs of a solar installer

One buyer shows a motive. Four show the market.

Thorsten, Markus and Lena bought for completely different reasons, and Klaus hasn’t decided yet – four very different buying jobs. We condensed 13 interviews into four segments, one bottleneck and five levers.

A real analysis – four buyer types, one per buying job (all interview quotes translated from German):
1/4 Thorsten · The self-sufficiency seeker
Level 1 · One buyer story · JTBD Innovation Framework

Why independence counted, not price

A homeowner didn’t want a cheap PV quote – he never wanted to be left without power for hours again, as he had experienced first-hand. (A typical buyer from this segment, condensed from several interviews.)

100%dependence on grid power, which bothered him
Hourswithout power – experienced first-hand
The timeline

From vulnerability to a closed loop

None of this was in a quote or an advert – it lies between the lines of the in-depth interviews. What are your buyers telling you between the lines?

P1 · The vulnerability

Hours without power

A power cut, lasting hours, experienced first-hand. His own 100% dependence suddenly became tangible.

P2 · The role model

Self-sufficiency, camper-van style

With his own camper van and its solar system, he had long been travelling self-sufficiently. What worked on the road, he wanted at home too.

‘I drive a camper van, and I have a solar system on the camper too’

P3 · The decision

The missing piece

What he bought wasn’t a single module, but whatever was still missing for independence.

P4 · The fulfilment

Independent – every day

Storage, heat pump and wallbox form one closed loop. What started out as his first motive is now everyday life.

Channels & triggers

Where the decision really happened

Trigger
Power cut / experienced first-handA real power cut makes his own dependence tangible
Role model
His own camper vanSelf-sufficiency in practice shows: it can be done
Selection
CompletenessThe missing piece for independence, not a single module
Proof
His own requirementsfrom the buyer – taken seriously instead of a standard quote

→ Vulnerability and a role model tipped the balance – not the price. Are you there when the balance really tips for your customers?

The four forces of progress

What drove them – and what held them back

Green = gain · Red = problem. Columns: existing vs. new solution. Rows: drives vs. holds back.

Existing solutionNew solution
drives the switch →
Push
drives · existing solution
  • 100% dependent on grid power

    ‘I really am 100% dependent on electricity. That’s simply a thought I don’t like.’

  • Experienced a power cut first-hand

    ‘How fragile the whole thing is, we’ve actually experienced first-hand ourselves – … no power for hours.’

Pull
drives · new solution
  • Independence, first of all

    ‘Independence. First and foremost, independence.’

  • The last box left to tick

    ‘That was the last box left to tick on the list.’

← holds back the switch
Habit
holds back · existing solution
  • Long convinced: it isn’t worth it

    ‘The topic was dead for me, because I was of the opinion that it wasn’t worth it.’

  • Until now: emergency power for two days

    ‘That lasts maybe two days. And we wanted to be independent.’

Anxiety
holds back · new solution
  • No response after the purchase

    ‘I must have called five or six times without … getting any information. Afterwards I was really angry.’

  • Leaking roof after installation

    ‘That was my big worry, that the roof wouldn’t be watertight afterwards. That would be stupid.’

→ A provider could actively move three of these four forces – being reachable after the purchase, a clean installation, a visible closed loop. Do you know which one tips the balance for your buyers?

Job dimensions + progress

What Thorsten really ‘hired’

Representing the self-sufficiency segment: three layers. The functional one is in the quote – the emotional and social ones tip the balance. Each comes with the yardstick the segment uses to measure progress.

What the ‘packaging’ says so far

functionalthe practical job

Turning his home into an energy-independent system that doesn’t depend on the grid, utilities or political whims.

Progress ↗
  • staying in control during a power cut and not being caught out
Avoids ↘
  • not being dependent on a single utility that is focused on its own profit
What really tips the balance
emotionalhow he wants to feel

Seeing himself as someone who looks after himself and stays in control when others are sitting in the dark.

Progress ↗
  • knowing his own back-up arrangements are complete, with no gaps
Avoids ↘
  • not letting a cloud or grid back door bring back the dependence he wants to avoid
socialhow he wants to be seen

Coming across to the people around him as a forward-looking, self-reliant person – not as an outsider.

Progress ↗
  • visibly generating more electricity than he uses and seeing his decision borne out
Avoids ↘
  • not having to chase things up for weeks after the purchase because commissioning and the subsidy paperwork aren’t handled proactively

This is an extract. The complete, prioritised outcome map per segment is part of the Customer Insights Sprint – exactly the brief a product or installation team prioritises against.

From a single buyer story alone

What you can already do with this one story

01

What sold was independence, not modules

Thorsten didn’t buy kilowatt-peak – he bought the end of his dependence. Anyone who sells solar on price and technology misses this driver.

02

After installation, the sale continues

Anyone who buys independence also wants a contact person after commissioning. If you can’t be reached then, you lose the referral.

03

Sector coupling is the core, not an upsell

Storage, heat and car as one closed loop was the job – not an add-on. Self-consumption beats feeding into the grid.

2/4 Markus · The number-cruncher
Level 1 · One buyer story · JTBD Innovation Framework

Why zero euros a month pulled harder than any discount

A buyer worked through every item – and decided when colleagues told him about their own systems. His calculation: €450 a month, for ten years – and utility bills down from €330 to €130. (A typical buyer from this segment, condensed from several interviews.)

€330→€130utility bills per month
10 yrsdecided too late – in hindsight
The timeline

From frustration over extra costs to a figure that speaks for itself

None of this was in a quote or an advert – it lies between the lines of the in-depth interviews. What are your buyers telling you between the lines?

P1 · The frustration

Charging as expensive as filling up

Extra costs that had become all too real made the status quo untenable – it was worth doing the maths.

P2 · The peer proof

Colleagues report

Several colleagues at work already had a system – happy with it and saving noticeably. A maybe turned into a calculation.

P3 · The calculation

€1,300 instead of €1,500 per kWp

It wasn’t the cheapest price that convinced him, but a sound calculation with a reliable forecast.

P4 · The confirmation

The figures speak for themselves

Utility bills down from €330 to €130 a month – the system delivers what the forecast promised.

Channels & triggers

Where the decision really happened

Trigger
His own extra costsCharging costs as high as filling up – the status quo gets expensive
Proof
ColleaguesFirst-hand experience beats any advert
Selection
ForecastA sound calculation instead of the cheapest price
Channel
Self-consumptionPower used in the house instead of fed into the grid at rock-bottom prices

→ Markus wasn’t looking for a discount, but for a figure he could trust. Are you there when your customers really do the maths?

The four forces of progress

What drove them – and what held them back

Green = gain · Red = problem. Columns: existing vs. new solution. Rows: drives vs. holds back.

Existing solutionNew solution
drives the switch →
Push
drives · existing solution
  • Money in the bank incurs a custody fee

    ‘From 1 July you have to pay a custody fee now, from 50,000 euros’

  • Charging as expensive as filling up

    ‘it’s actually almost the same, just as expensive as if I were filling up with fuel’

Pull
drives · new solution
  • Effectively, it costs nothing a month

    ‘In the end, it costs me nothing a month.’

  • €450 a month, for ten years

    ‘I now get 450 euros every month, for 10 years, without having to do anything for it, because the sun shines.’

  • Colleagues really are saving money with it

    ‘several colleagues at work told me they’d done it, that they’re very happy with it and really are saving money’

← holds back the switch
Habit
holds back · existing solution
  • Hunting for the cheapest tariff every year

    ‘I’m a crafty one. I went online and looked for the cheapest electricity provider every year.’

Anxiety
holds back · new solution
  • Cheap provider, nothing but problems afterwards

    ‘not look for just any company on the internet that might make the best offer, but then I only have problems afterwards. I didn’t want that.’

  • Trouble in the second year

    ‘The first year they’re happy and the second year they’re annoyed. It’s always like that.’

→ A provider could move three of these four forces – forecast, self-consumption, a provider who is still there after the first year. Do you know which one tips the balance?

Job dimensions + progress

What Markus really ‘hired’

Representing the ROI optimiser segment: three layers. The functional one is the calculation – the emotional and social ones tip the balance. Each comes with the yardstick the segment uses to measure progress.

What the ‘packaging’ says so far

functionalthe practical job

Investing capital in an energy solution that verifiably pays for itself and visibly lowers ongoing energy costs.

Progress ↗
  • achieving a visible saving every month and lowering energy costs for good
Avoids ↘
  • not paying almost as much for grid power and charging as for petrol
What really tips the balance
emotionalhow he wants to feel

Seeing himself as someone who calculates soberly, checks and does the right thing at the right time – instead of leaving capital idle.

Progress ↗
  • making an investment that pays for itself out of the savings it generates and gives security in retirement
Avoids ↘
  • not seeing capital in the bank cost money instead of working
socialhow he wants to be seen

Being regarded by the people around him as competent and credible – someone who speaks from first-hand experience when asked and gives reliable recommendations.

Progress ↗
  • reporting to the people around him when asked and recommending it once real figures are available

This is an extract. The complete, prioritised outcome map per segment is part of the Customer Insights Sprint – exactly the brief a product or installation team prioritises against.

From a single buyer story alone

What you can already do with this one story

01

What sold was a figure, not a discount

Zero euros a month convinced him, not the price reduction. Here, a discount tends to arouse mistrust rather than trust.

02

The peer is the strongest sales channel

Colleagues’ experience beat any advert. In our view, a structured referral programme is the most effective lever.

03

Forecast beats price

A sound calculation with a reliable forecast won against the cheapest provider. Trust in the figure is the product.

3/4 Lena · The pioneer
Level 1 · One buyer story · JTBD Innovation Framework

‘Who, if not us’: why her parents tipped the balance

A young couple renovated their house from the ground up – without gas, with an energy loop of their own. The driver wasn’t returns, but identity: taking action instead of watching. (A typical buyer from this segment, condensed from several interviews.)

Financial helpfrom her parents
1 dayto get a reply
The timeline

From feeling the impact to an everyday contribution

None of this was in a quote or an advert – it lies between the lines of the in-depth interviews. What are your buyers telling you between the lines?

P1 · Personally affected

No longer just watching

Daily climate news and being personally affected created the wish to take action herself.

P2 · The catalyst

The push from the family

Financial help from her parents – the concrete catalyst that turned conviction into action.

P3 · The decision

Full renovation without gas

The house was planned from the ground up without fossil heating – a visible, everyday contribution.

Channels & triggers

Where the decision really happened

Trigger
Personally affectedClimate news + the wish to take action herself
Catalyst
FamilyFinancial help from her parents makes conviction concrete
Identity
Pioneer roleSeeing herself as someone who acts, not as a saviour of the world
Selection
Sector couplingA closed loop of her own, not a single product

→ The driver was about identity, not economics. Are you selling the experience of being a pioneer – or the promise of saving the world?

The four forces of progress

What drove them – and what held them back

Green = gain · Red = problem. Columns: existing vs. new solution. Rows: drives vs. holds back.

Existing solutionNew solution
drives the switch →
Push
drives · existing solution
  • No longer wanting just to watch

    ‘You keep hearing more and more through the media, about climate change, about the climate disasters.’

  • Personally affected

    ‘We ourselves are affected by the flood disaster right here in our immediate surroundings.’

Pull
drives · new solution
  • A visible, everyday contribution

    ‘we talked about climate protection and simply thought about what contribution we could make’

  • An energy loop of her own

    ‘we have our own loop, we’ve reached a certain self-sufficiency here and produce our own electricity, which we turn back into heat ourselves’

← holds back the switch
Habit
holds back · existing solution
  • Not buying anything on credit

    ‘We’ve never been fans of paying for things out of running income, only to end up, let’s say, stuck in some 0% financing deal or other.’

  • Not for another five, six, seven years

    ‘Otherwise we wouldn’t have done it yet, but at some point in … five, six, seven years.’

Anxiety
holds back · new solution
  • Too little expertise of her own

    ‘I don’t really know a hundred per cent about the quality of the modules either.’

  • Waiting weeks for a quote

    ‘One company sent the quote after five weeks – even though I’d chased it in the meantime.’

→ A provider could move three of these four forces – expert reassurance, a fast quote, the visible closed loop. Do you know which one tips the balance?

Job dimensions + progress

What Lena really ‘hired’

Representing the pioneer segment: three layers. The functional one is the system – the emotional and social ones tip the balance. Each comes with the yardstick the segment uses to measure progress.

What the ‘packaging’ says so far

functionalthe practical job

Making her home a visible, everyday contribution to the energy transition – generating and using as much of her own electricity as possible.

Progress ↗
  • generating a measurable share of her electricity needs herself and noticeably reducing what she draws from the grid
Avoids ↘
  • not waiting weeks for a quote or getting stuck in a market that doesn’t respond
What really tips the balance
emotionalhow she wants to feel

Seeing herself as someone who acts instead of just watching – true to her own convictions, for her family and the next generation.

Progress ↗
  • feeling the closed energy loop every day – sun on the roof, her own power in the house
Avoids ↘
  • not remaining in the passive role of onlooker, which contradicts her self-image
socialhow she wants to be seen

Being seen by like-minded people and the community as someone who doesn’t just talk but acts – and shows others the way.

Progress ↗
  • showing others the way and actively telling friends and acquaintances about it

This is an extract. The complete, prioritised outcome map per segment is part of the Customer Insights Sprint – exactly the brief a product or installation team prioritises against.

From a single buyer story alone

What you can already do with this one story

01

What sold was identity – climate protection alone wouldn’t have been enough

Lena wanted to see herself as someone who acts. Saving the climate misses the motive – being a pioneer hits it.

02

The catalyst turns conviction into action

Years of conviction only became a purchase through a concrete event. Recognise the catalyst and you get the timing right.

03

Sector coupling as a visible closed loop

The energy loop of her own is the experience – not the kilowatt-peak. Visibility beats specification.

4/4 Klaus · The hesitant one
Level 1 · One buyer story · JTBD Innovation Framework

Why more quotes didn’t help – but clarity did

A prospective buyer spent years researching – and still hasn’t decided. It isn’t money holding him back, but the worry of buying something today that will be seen as a mistake in five years. (A typical prospective buyer from this segment, condensed from several interviews.)

since 2017researching, no decision yet
contradictoryevery expert tells you something different
The timeline

Interested, but blocked – by the fear of making a mistake

None of this was in a quote or an advert – it lies between the lines of the in-depth interviews. What are your buyers telling you between the lines?

P1 · The research

Reading up for years

He read up on it, year after year – and still came no closer to a decision.

P2 · The people around him

Horror stories from acquaintances

What he mostly heard from the people around him were reports of systems that didn’t perform as promised. Each one made the risk seem bigger.

P3 · The sticking point

Great today, a mistake in five years

The worry of buying something today that will be seen as a mistake in five years – and no reliable basis to dispel it. The decision was put off.

P4 · The doubt

What do I actually get out of it?

Without a reliable, neutral basis, the impression remained: a lot of effort, little concrete benefit.

Channels & triggers

Where the decision really happened

Trigger
People around himExperiences of acquaintances – above all the bad ones
Check
ResearchYears of reading up without a decision being made
Sticking point
WorryWhat holds true today may be a mistake in five years
Need
DialogueAn adviser who resolves contradictions – not yet another PDF

→ It wasn’t the price that blocked Klaus, but the worry that it would turn out to be a mistake in five years. Do you address your customers’ specific doubts – or send yet another data sheet?

The four forces of progress

What drove them – and what held them back

Green = gain · Red = problem. Columns: existing vs. new solution. Rows: drives vs. holds back.

Existing solutionNew solution
drives the switch →
Push
drives · existing solution
  • Every expert says something different

    ‘What bothered me most … was that every expert tells you something different.’

Pull
drives · new solution
  • A salesperson who gives honest advice

    ‘He told me what makes sense and what doesn’t’

← holds back the switch
Habit
holds back · existing solution
  • Preferring to keep researching

    ‘researched in 2018 too and in 2019 as well. Since Corona I’ve taken a bit of a break’

  • Nothing in it for me at the moment – so wait and see

    ‘Well, apart from my conscience and more effort, there’s nothing in it for me at the moment.’

Anxiety
holds back · new solution
  • Great today, a mistake in five years

    ‘what’s considered totally great right now may in five years be seen as … not so clever after all.’

  • Horror stories from the people around him

    ‘They had nothing but problems. Then feeding into the grid didn’t work.’

→ Here, habit and anxiety hold him back more strongly than push and pull drive him forward. Do you know the doubts that make your buyers hesitate?

Job dimensions + progress

What Klaus really ‘hired’

Representing the decision-seeker segment: three layers. The functional one is the decision – the emotional and social ones tip the balance. Each comes with the yardstick the segment uses to measure progress.

What the ‘packaging’ says so far

functionalthe practical job

Making a five-figure decision on a reliable basis in a market of contradictory expert opinions and unclear figures.

Progress ↗
  • getting a complete, reliable basis for the decision with real figures – including maintenance, degradation and worst case
Avoids ↘
  • not regretting in five years that he decided on an incomplete basis
What really tips the balance
emotionalhow he wants to feel

Seeing himself as a confident, rational decision-maker who handles a complex investment on his own terms – without a guilty conscience.

Progress ↗
  • keeping control over his own energy and mobility costs, not being permanently at the mercy of the market
Avoids ↘
  • not depending on contradictory statements from experts and providers that no decision can be built on
socialhow he wants to be seen

Being regarded by the people around him as someone who pursues the project with serious intent and in a way that is in keeping with its surroundings – neither showy nor an eyesore.

Progress ↗
  • being perceived as an active, responsible owner with a solution in keeping with its surroundings

This is an extract. The complete, prioritised outcome map per segment is part of the Customer Insights Sprint – exactly the brief a product or installation team prioritises against.

From a single buyer story alone

What you can already do with this one story

01

What sells is confidence in the decision, not a discount

Klaus didn’t need a price reduction, but a neutral basis. Our reading: a discount would more likely have fed his scepticism.

02

Dialogue beats data sheet

More PDFs don’t resolve contradictions. An adviser who addresses the specific doubts wins this job.

03

A trial calculation with real data unties the knot

Not more choice, but a reliable calculation with his own figures gets the hesitant decision over the line.

From buyer to market
Four buyer types, four buying jobs

Four buying jobs, not one segment

From 13 interviews, four clearly distinct buying motivations emerged. The same provider wins all of them – but only with a separate language, trigger and proof for each job.

One message for everyone loses all four. Address a generic solar customer and you address nobody.

Thorsten is here
SEG-01

Resilience-driven self-sufficiency seekers

Turning my home into an energy-independent system.

Push: vulnerability to power cuts
Pull: a closed loop of self-generated power
Markus is here
SEG-02

Rational ROI optimisers

Investing capital in an energy solution that measurably pays off.

Push: extra costs that have become all too real
Pull: measurable monthly savings, a reliable forecast
Lena is here
SEG-03

Climate-conscious pioneers

Making my home a visible, everyday contribution.

Push: feeling personally affected + the wish to take action oneself
Pull: a visible energy loop of one’s own
Klaus is here
SEG-04

Hesitant decision-seekers

Deciding with confidence in a market of contradictory opinions.

Push: contradictory experts, unclear economics
Pull: a reliable, independent basis for the decision with real figures

→ Four jobs, four languages. Across how many buying jobs is your marketing currently speaking with one voice?

Pattern 1

Peer trigger beats advertising

In three of the four buying jobs, someone from the buyer’s own circle with a system of their own helped trigger the purchase – for Markus, his colleagues – never traditional advertising. In our view, a structured referral programme is the most effective lever of all.

Pattern 2

Response time is the product

Several buyers report waiting weeks for quotes – the chosen provider replied within a day. That isn’t a service feature, but the strongest differentiator – and it was invisible online.

The real competitive landscape

What the solar installer was really up against

From the customer’s point of view, he rarely competed with other solar firms. His real competition was this:

Doing nothing

Simply staying with grid power

Carrying on paying €330 in utility bills – until colleagues talked about their savings.

rejected
Doing nothing

Researching further, deciding later

The decision was put off.

kept
Same category

A cheap stand-alone PV provider

A low price signal, but without sector coupling or a proper specification.

rejected
Different category

Solving the electric car / heat pump separately

Sectors separate instead of coupled – no closed loop of self-generated power.

rejected
Same category

The solar installer with sector coupling

1-day response time + a coupled closed loop instead of a single product.

chosen

The strongest competitors were putting it off and staying on grid power – not the other solar firm.

The bottleneck

The question that decided the purchase – ‘Does a coupled system pay off for MY house?’ – couldn’t be answered online. The provider made its strongest advantages (1-day response time, sector coupling) invisible – and the advertising budget attracted exactly the stand-alone PV bargain hunters it didn’t want.

What the bottleneck revealed

Five measures with the biggest leverage

All without additional advertising budget – through visibility of the real advantages and the referral channel.

M1 was non-negotiable: the sector coupling calculator.

M1non-negotiable

Sector coupling calculator on the website

Enter household, electric car, heating → net savings, payback period, self-consumption rate. Zero marginal cost.

Qualifies leads by itself, differentiates without price pressure.
M2

Make a 24-hour response-time SLA visible

A public call-back promise, the strongest differentiator as the headline promise.

The invisible advantage becomes a selling point.
M3

Reel series ‘Figures from the neighbours’

Video series with real customers and real figures (€330→€130, €450 a month).

Advertising that feels like a conversation with a peer.
M4

Three sector coupling package landing pages

One per buying job instead of one message for everyone.

Each job in its own language.
M5

Referral/peer programme with an incentive

Activate existing customers and interview participants as the first wave.

The cheapest, best-qualified channel, turned into a system.
And for your business?

This isn’t a solar report. This is the method.

Traditional marketing measures the wrong things – clicks, reach, target audiences. Jobs to Be Done measures why people really buy, and puts everything that follows – product development, marketing, sales – on a sound footing. In a few weeks, you’ll have this compass for your own business. And if you don’t find out which job really makes your customers buy, your competitor might find out first.

We run six to eight sprints a year, depending on complexity.

Note: A real JTBD analysis from 13 qualitative in-depth interviews and 4 segments (2026) – created with the JTBD Innovation Framework. The provider is anonymised as a solar installation company; the names Thorsten, Markus, Lena and Klaus each stand for one segment. Their quotes come from different buyers in that segment, translated from the German originals; cuts are marked with an ellipsis (…).