Practical-task solar training for South Africa. Judged on workmanship you can point at and records you can hand over: PV GreenCard checklist evidence captured as you work, fault-finding under real backup and load-shedding constraints, and COC-supporting documentation that stands on its own. Aligned with SAPVIA PV GreenCard and the Solar PV Service Technician pathway.
3
Competence levels
10
Practice questions
2
Timed mocks
How South Africa judges competence
Practical task quality plus documentation discipline
You are marked on the finished task and the record behind it. Workmanship, test results and handover paperwork carry the assessment; an unsafe method still fails outright.
Practical task quality and documentation discipline, to SANS 10142-1 and PV GreenCard expectations.
South African installers and service technicians whose work is judged by the finished task and the record behind it — PV GreenCard holders, NQF 4/5 candidates, and anyone whose installation has to support a COC.
· QCTO NQF 4 — Solar PV Installer occupational qualification
· QCTO NQF 5 — Solar PV Service Technician occupational qualification
The three competence levels
Every level ends in graded field labs. An unsafe selection fails the lab outright, so progression means the method is reliable, not that the pages were read.
Level 1 — Small standalone DC systems
5 modules · 18 graded labs · 5 h
Read a system before touching it, isolate and prove dead every time, survey a site honestly, and install to a sequence that survives a season.
· Solar fundamentals for field technicians
· Electrical hazards, isolation & LOTO
· Working at height, battery hazards and emergency response
· Site assessment & system identification
· Installation sequence & best practices
Level 2 — Inverter and battery systems
6 modules · 24 graded labs · 6 h
Inverter conversion stages and protection logic, module-level electronics, storage and BMS behaviour, monitoring data you can trust, and measurements taken under conditions that make them mean something.
· String inverters — operation & service
· Microinverters & module-level power electronics
· Battery storage systems (AC & DC coupled)
· Wiring, earthing/bonding and protection
· Monitoring systems & performance data
· Electrical measurements that matter in solar
Level 3 — Grid-tied and hybrid systems
10 modules · 47 graded labs · 13 h
Commissioning to spec, structured fault narrowing on multi-symptom calls, a professional service visit end to end, defensible documentation, and a four-stage live hybrid capstone.
· Commissioning & acceptance testing
· Testing, commissioning and handover
· First-line diagnostics — the 80% problems
· Fault-finding, diagnosis and maintenance
· Advanced troubleshooting logic
· The professional service call
· Documentation, warranty and liability
· Documentation, handover and regulatory awareness
· EcoService OS mastery on solar jobs
· Capstone — full field assessment
What South Africa adds on top of the core
Task quality you can be marked on: terminations, routing, labelling, earthing and bonding done to a standard a peer would sign
Load-shedding and backup behaviour — most 'not working' calls are mode, changeover or battery-communication issues, not dead panels
Essential-loads wiring and changeover verified before any PV testing begins
PV GreenCard checklist evidence captured while you work, never reconstructed in the van afterwards
COC-supporting records: earthing, protection settings, test results and as-builts that stand on their own
Regulators and what they expect
SAPVIA
PV GreenCard
Checklist-driven installation evidence and a customer handover pack issued against a completed installation.
QCTO / SAQA
Solar PV Installer (NQF 4), Solar PV Service Technician (NQF 5)
Occupational competence across safe working, installation, testing, diagnostics, performance verification and reporting.
SANS / OHS Act
Certificate of Compliance practice
SANS 10142-1 and the embedded-generation annex: earthing and bonding, protection, testing and the records a COC rests on.
What this material is, and is not
This is exam-prep and skills-support material. It is not a certification, a licence, or an accredited training programme.
EcoPowerHub Academy issues a course completion certificate only. EPRA, NABCEP and SAPVIA / QCTO issue the credentials themselves.
It does not replace required formal training hours, supervised field experience, or the practical assessments each framework sets.
Always confirm current requirements directly with the licensing or certifying body for your market.
Maya · Your diagnostic coach
Practise with Maya
Meet Maya, your diagnostic coach. She helps you practise the real method — not just the theory. She will guide you through questions, scenarios, and the habits that actually matter on site, step by step.
Maya helps you grow into strong PV GreenCard and Service Technician habits — practical method, good fault-finding, and clean documentation that supports quality work and COC-ready standards.
18 support sets alongside the graded curriculum: practice questions with reasoning, scenario labs, timed mock assessments, method checklists, calculation drills, documentation templates and explanation cards.
South Africa material comes first, in the order this region is assessed in; the shared core method follows underneath.
Any safety-critical error fails the lab or assessment outright, whatever the rest of the answer scored. There is no partial credit for an unsafe method.
Method checklist
PV GreenCard quality method
Checklist-driven work: the evidence is captured as you install, not reconstructed for the handover pack.
What an assessor is actually watching while you work.
Level 1Level 2Level 3
1. Confirm the installation scope and the responsible registered personSafety-fail
Certificate of Compliance responsibility must be clear before work starts.
2. Isolate PV, battery and AC, lock off and prove deadSafety-fail
Backed-up boards stay live from storage when the grid is down — the load-shedding trap.
3. Verify the essential-loads board and changeover arrangement before PV testing
Most 'system not working' calls during load shedding are changeover or mode issues, not PV faults.
4. Verify earthing and bonding to the installation's earthing arrangementSafety-fail
SANS 10142-1 practice, and the item most often found wanting on inspection.
5. Perform and record polarity, continuity, insulation resistance and functional tests
These results are what the COC and the GreenCard record actually rest on.
6. Complete the installation checklist item by item at the point of work
A checklist filled in afterwards is a description, not evidence.
7. Issue the customer handover pack with operating and shutdown instructions
The customer must be able to shut the system down safely without you.
Method checklist
Practical task simulations — how the finished work is marked
Four tasks you will be watched doing, with the quality standard each one is judged against. Do them on a rig or a real job and mark yourself honestly.
What an assessor is actually watching while you work.
Level 1Level 2Level 3
PV GreenCard installation quality and NQF 4/5 practical task assessment.
1. Task 1 — terminate and label a DC string: crimped connectors of one make, correct polarity, cable secured off the roof surface
Mixed-brand connectors and unsupported cable are the two defects assessors find most often, and both cause later failures.
2. Task 2 — earth and bond an array: continuity measured and recorded, not assumed from a visible conductorSafety-fail
A bonding conductor that looks connected but measures open is the difference between a compliant install and a dangerous one.
3. Task 3 — verify essential-loads changeover: simulate loss of supply and confirm what actually stays alive
The customer judges the installation by what stays on during load shedding, and so does the assessor.
4. Task 4 — isolate a backed-up hybrid installation and prove dead on DC, battery and ACSafety-fail
A backed-up system can re-energise its own AC side after the grid is isolated. Prove dead at the point of work.
5. Every task is closed by writing the result down before you move to the next one
The record is part of the task. Work finished but unrecorded scores as work not proven.
Method checklist
COC-ready record habits
The small habits that decide whether your paperwork supports a Certificate of Compliance or undermines it.
What an assessor is actually watching while you work.
Level 2Level 3
SANS 10142-1 practice and PV GreenCard evidence expectations.
1. Values are written at the point of measurement, on the instrument reading, not from memory in the vanSafety-fail
Reconstructed values are estimates, and an estimate cannot support a COC.
2. Every value carries units, the instrument used and the test conditions
An insulation resistance figure without its test voltage cannot be assessed by anyone else.
3. Gaps are left visible and explained, never filled with a plausible numberSafety-fail
An honest gap is a scheduling problem; an invented value is a compliance offence.
4. The as-built is updated the day the installation changes
Drawings that describe the quote instead of the installation mislead the next technician.
5. Protection and inverter settings are recorded as configured, with the date and who changed them
Settings are the part of the installation nobody can see, and the part a later fault will turn on.
6. The record names the person, the date and what is outstanding
An unsigned, undated record is not evidence of anything.
Documentation template
GreenCard handover and COC-supporting records
Checklist evidence, test results and the customer pack, in the order they are audited.
The paperwork, filled in the way it will be audited.
Level 3
Installation checklist record
Item-by-item evidence captured during installation, supporting the GreenCard issue.
· Site and system details, responsible person
· Mounting, penetrations and weatherproofing
· DC wiring, protection and labelling
· AC wiring, changeover and essential-loads board
· Earthing and bonding arrangement
· Storage installation, ventilation and clearances
· Test results and defects raised
Commissioning and test record
Polarity, continuity, insulation resistance and functional test results at handover.
Take a system you have worked on and produce the as-built pack from it. The gaps you find are the habits to fix.
The paperwork, filled in the way it will be audited.
Level 2Level 3
Records a Certificate of Compliance rests on, and the PV GreenCard handover pack.
As-built single-line diagram
Exercise: draw the system as installed, not as quoted. Every difference from the design is a note you must be able to justify.
· Array configuration — strings, modules per string, orientation
· DC protection, isolators and their locations
· Inverter and battery equipment with ratings
· Essential-loads board and changeover arrangement
· Earthing and bonding arrangement
· Point of connection and AC protection
Test results supporting the COC
Exercise: fill in only measured values. A blank is honest; an invented number is a compliance failure.
· Earth continuity and bonding results
· Insulation resistance per string, with test voltage
· Polarity and string Voc / Isc against expectation
· Earth leakage protection operation and trip time
· AC voltage, frequency and phase rotation where applicable
Settings and configuration record
Exercise: record the settings as configured on the day, with who changed them and why.
· Inverter grid-code profile and protection settings
· Battery charge / discharge limits and reserve for load shedding
· Changeover and essential-loads priority
· Monitoring account, baseline reading and date
Customer handover pack
Exercise: assemble what the customer keeps, and check a stranger could operate the system from it.
· What runs during load shedding and for roughly how long
· How to restart safely after an extended outage
· Maintenance schedule and warranty contacts
· Installer details, PV GreenCard reference and date
Graded scenario brief
Backed-up residential hybrid — nuisance tripping and no backup
A practical brief with the scoring dimensions PV GreenCard and NQF assessments use: method, measurement, priority, safety and records.
A full scenario brief with the scoring dimensions and the errors that end the assessment.
Level 2
PV GreenCard / Solar PV Service Technician practical assessment.
Hybrid backup fault scenario and scoring rubric
Customer report: “The earth leakage trips every few days, usually after rain, and when the grid goes out nothing on the backup plug points comes on.”
· 5 kWp PV array in two strings
· Hybrid inverter with a changeover to an essential-loads board
· 48 V lithium battery, roof-mounted array on IBR sheeting
· Earth leakage protection on the main distribution board
Your tasks
1. State the order of actions from arrival to diagnosis.
2. List the tests you will perform and the values you expect.
3. Separate the two reported complaints and prioritise them.
4. State the safety-critical errors possible in this scenario.
5. List the records you would produce for the client's file.
Scoring — 20 points, pass at 16
Installation and diagnostic method5 pts
· Client briefing and full visual survey including roof penetrations
· All sources identified: PV, battery, grid
· Isolation and prove dead before any intrusive test
· Two complaints treated as potentially independent faults
Test selection and expected values4 pts
· Insulation resistance per circuit, wet and dry, with numbers recorded
· Earth continuity and bonding verified end to end
· Changeover and backup mode verified under a simulated outage
· String voltages and polarity confirmed
Fault priority4 pts
· First: moisture ingress in DC wiring, connectors or roof penetrations
· Second: essential-loads board wiring or changeover configuration
· Third: inverter protection settings
· Fourth: inverter internal failure
Safety awareness4 pts
· Prove dead on both DC and AC sides before work
· Roof access and fall protection stated before climbing
· No live insulation testing, and no bypassing of protection to 'stop the tripping'
COC-ready records3 pts
· Measured values with units and conditions
· Installation checklist matched to the as-built system
· Protection settings and backup verification recorded
· Signed, dated, with next action and residual risk stated
Automatic fail triggers
× Working on conductors without proving dead
× Disabling or bypassing earth leakage protection to clear the symptom
× Roof access without fall protection
× Entering values on the record that were not measured
Trainer model answer (tap to reveal)
Brief the client and survey the installation, including roof penetrations and cable entries.
Identify PV, battery and grid sources; isolate and prove dead before intrusive testing.
Treat the tripping and the failed backup as two faults until the evidence links them.
Measure insulation resistance circuit by circuit, wet and dry, and record every value.
Verify earth continuity and bonding, then string voltage and polarity.
Simulate an outage to test the changeover and the essential-loads board.
Most likely: moisture ingress at a DC connector or penetration, plus an essential-loads board that was never fully wired or configured.
Close with a signed record carrying measured values, settings, verification results and the next action.
Graded scenario brief
Fault-finding under constraint — commercial site, one shutdown window
A practical scenario where the constraint is the exam: limited outage time, a customer watching production, and a record that must still be complete.
A full scenario brief with the scoring dimensions and the errors that end the assessment.
Level 3
Solar PV Service Technician (NQF 5) diagnostic and reporting competence.
Constrained fault-finding scenario and scoring rubric
Customer report: “One of three inverters has been under-producing for a fortnight and trips out on hot afternoons. We can only shut anything down between 12:00 and 13:00, and we need the site producing again by 13:00.”
· Commercial rooftop PV, three string inverters
· Two inverters performing normally, one under-producing
· No battery; grid-tied only
· Monitoring portal with fifteen-minute data
· Single agreed shutdown window of one hour
Your tasks
1. State what you do before the shutdown window opens, and why that work must happen first.
2. State exactly what you will do inside the window, in order, with a time budget.
3. Say which measurements you would sacrifice if the window closes early, and which you would never sacrifice.
4. Give the likely causes in priority order for a heat-correlated afternoon trip.
5. State what goes in the report if you leave the site without a confirmed cause.
Scoring — 20 points, pass at 15
Preparation before the window5 pts
· Monitoring data compared across the three inverters under the same conditions
· Live checks that need no shutdown done first — thermal survey, AC voltage, event log, ventilation and soiling
· Tools, spares and test equipment staged so the window is not spent fetching things
· Shutdown plan agreed with the site contact, including who may not switch anything back on
Use of the shutdown window5 pts
· Isolation and prove dead executed first and without shortcuts, inside the budgeted time
· Highest-value measurements taken early — insulation resistance, string Voc and Isc, termination inspection
· Torque and thermal evidence checked at the terminations the thermal survey flagged
· Restoration and functional check completed before the window closes
Fault priority for a heat-correlated trip4 pts
· First: high-resistance termination or connector degrading as it heats
· Second: inverter thermal derating from blocked ventilation, soiling or ambient
· Third: string imbalance, shading or a module-level fault
· Fourth: grid voltage rise on hot afternoons pushing the inverter over its limit
Safety under time pressure4 pts
· Never trades isolation or prove dead for time
· States plainly that the window closing is not a reason to work live
· Roof access, heat and fall protection addressed even in a rush
· Leaves the site in a defined, safe state whether or not the fault was found
Report quality when the cause is unconfirmed2 pts
· Records what was measured and what was not, with reasons
· States the leading hypothesis and the specific evidence that would confirm it
· Books the next window with a defined test plan rather than a vague return visit
Automatic fail triggers
× Working on DC or AC conductors without isolating and proving dead because the window is closing
× Restoring supply without confirming the system is safe and complete
× Recording measurements that were not taken
× Allowing the site contact to re-energise without your control of the isolation
Trainer model answer (tap to reveal)
The constraint is the exam. Everything that does not need a shutdown must be finished before the window opens.
Compare the three inverters over the same days and hours — a heat-correlated divergence tells you where to look.
A thermal survey under load, taken before shutdown, usually points straight at a high-resistance termination.
Inside the window: isolate, prove dead, then take insulation resistance and string values, then inspect and torque the terminations you flagged.
Restore and verify before 13:00 even if the diagnosis is incomplete — an unsafe or half-restored site is a worse outcome than an unconfirmed fault.
If you leave without a confirmed cause, say so plainly, list what you measured, name the leading hypothesis, and book the next window with a specific test plan.
Practice question bank
PV GreenCard and NQF practice questions
Backup-mode, earthing and documentation questions in South African phrasing.
Exam-style questions with the reasoning behind every answer.
Level 1Level 2Level 3
Supports PV GreenCard installer registration and the Solar PV Service Technician (NQF) qualification.
Practise with Maya
Question 1 of 5Score 0/0
During load shedding a customer reports the backup 'does nothing'. What do you check first?
Calculation drills
South African calculation drills
Backup sizing and cable checks for load-shedding-driven installations.
Numbers you must be able to produce without a spreadsheet.
Level 2
Backup runtime for essential loads
A household wants to ride through a four-hour stage-6 block.
· Essential load average: 850 W
· Battery: 10 kWh nominal, 90% usable
· Inverter efficiency: 94%
· Starting state of charge: 70%
Find: How long will the backup last?
Answer: ≈ 7.0 hours
Available energy = 10 kWh × 0.90 × 0.70 = 6.3 kWh
Delivered to loads = 6.3 × 0.94 = 5.92 kWh
Runtime = 5.92 kWh / 0.85 kW = 6.97 h
Comfortably covers a four-hour block, provided nothing outside the essential board is switched over.
Battery cable sizing
Check the DC cable between a 48 V battery and the inverter.
· Maximum discharge current: 100 A
· One-way run: 2.5 m
· Cable: 35 mm² copper (0.0175 Ω·mm²/m)
· Target drop: under 1%
Find: Does the cable meet the target?
Answer: ≈ 0.25 V, 0.52% — compliant
R = 0.0175 × (2 × 2.5) / 35 = 0.0025 Ω
V_drop = 100 × 0.0025 = 0.25 V
0.25 / 48 = 0.52%, within the 1% target
Confirm the termination lugs and protection are rated for the same current.
The habits that separate a GreenCard-quality installation from one that passes visually and fails on paper.
Correct answer, why it is correct, and the mistakes people make.
Level 1Level 2Level 3
PV GreenCard installation quality and NQF practical task readiness.
What does an assessor mean by 'installation method' when the workmanship already looks tidy?
A repeatable sequence: mounting and penetrations sealed to spec, DC routing separated and mechanically protected, correct DC-rated isolation devices, earthing and bonding continuous, then labelling before energising.
Tidy cable management is visible; sequence is what determines whether the system survives weather and stays safe under fault conditions.
× Energising before labels and signage are in place
× Using AC-rated devices on the DC side because they fit the enclosure
× Leaving bonding to the end and discovering a missing jumper at test
What is the correct approach to a hybrid installation that trips earth leakage in wet weather?
Isolate and prove dead, then measure insulation resistance circuit by circuit, wet and dry, and record the values rather than the impression. Correlate with weather and time before touching any component.
A weather-correlated fault is evidence of moisture ingress in a specific circuit. Measured values isolate it; part-swapping only moves the fault.
× Testing only when the fault is not present
× Recording 'passed' with no numbers, so the next visit starts from zero
× Replacing the inverter for a cable or connector fault
What makes documentation 'COC-ready' rather than merely complete?
Every declared value is a measured value taken under stated conditions, the installation checklist matches the as-built system, protection settings are recorded, and the pack is signed and dated by the person who did the work.
A certificate is a legal statement. Anything unmeasured, undated or unsigned undermines the whole pack under scrutiny.
× Copying design figures into the commissioning record
× A checklist that describes the quoted system, not the installed one
× Missing backup-mode verification on a system sold with backup
Timed mock assessment
PV GreenCard / NQF 5 timed mock
Ninety minutes on backup behaviour, earthing and documentation quality.
Sit it against the clock and read the score report honestly.
Five questions, two calculation drills and graded scenarios. Complete the checklist evidence as you work, not at the end.
· Isolating a backed-up installation — The backup output stays live from storage during an outage.
· Weather-correlated earth leakage — Test when and where the fault appears.
Maya · Your diagnostic coach
90 minutes · 5 questions · pass mark 70%
Any safety-critical error fails the lab or assessment outright, whatever the rest of the answer scored. There is no partial credit for an unsafe method.
Method checklist
Proving isolation on a hybrid system
The isolation method every region assesses, in the order it is assessed. Switching something off is not isolation; isolation is a state you prove and keep proving.
What an assessor is actually watching while you work.
Level 1Level 2Level 3
1. Identify every energy source before touching anythingSafety-fail
PV, battery, grid and any generator are separate sources. Missing one is how people get hurt on a system that 'was off'.
2. Shut down in the manufacturer's stated orderSafety-fail
Most hybrids specify inverter to standby, then AC, then PV, then battery. The order decides where energy is left trapped.
3. Prove the instrument on a known live source before and after testingSafety-fail
Testers fail silently. A dead reading from an unproven instrument is not evidence.
4. Test every combination at the point of workSafety-fail
Positive to earth, negative to earth and positive to negative on DC; line to neutral and line to earth on AC. One reading is not a proof.
5. Lock and tag every isolator you operated, and keep the key
A note on the panel does not stop a homeowner or a colleague restoring power while you are inside the equipment.
6. Respect the stated DC-link discharge time, then verify it
Capacitors hold charge after isolation. The waiting time is a minimum, not a guarantee.
7. Re-prove dead after any interruption or absence from the work area
Isolation you did not personally maintain is isolation you no longer own.
8. Photograph the isolation state and the applied lock
It is a safety record and diagnostic evidence at the same time, and it is what a defensible job file rests on.
Method checklist
The systematic diagnostic sequence
One order of work, used on every call, in every region. It is the order that keeps a hard fault from costing a whole day.
What an assessor is actually watching while you work.
Level 2Level 3
1. Write the symptom as reported, then separate it from any assumed cause
'The inverter is broken' is a conclusion, not a symptom. Assessors mark whether you can tell them apart.
2. Prove isolation before any intrusive workSafety-fail
The single most common automatic fail across EPRA, NABCEP and QCTO practice.
3. Observe a full start-up cycle before intervening
Where the sequence stops names the gating condition that failed — and eliminates everything downstream of it.
4. Take measurements that answer a specific question
Random voltage checks score poorly everywhere. Each measurement should eliminate a branch.
5. Compare output against a condition-corrected expectation, never nameplate
Without irradiance and cell temperature you cannot yet say whether there is a fault at all.
6. Eliminate the simple high-probability faults before the expensive part
Connections, settings, soiling and shading account for most calls. Methodical elimination beats confident guessing.
7. Verify the repair under the conditions that produced the fault
A fault that only appears after rain or at midday is not fixed because it is quiet at 9am.
8. Record what you actually measured, including inconvenient numbers
Inflated commissioning sheets are recognised instantly and destroy credibility.
Documentation template
Commissioning, service and as-built records
The three documents every region expects. Printable, and written to be read by someone who was not there.
The paperwork, filled in the way it will be audited.
Level 3
Commissioning sheet
Proves the system was tested to spec, under stated conditions, on a stated date.
Captures what is actually installed once the design met the roof, so the next technician is not re-surveying.
· Array layout with string routing and module counts
· Isolator and disconnect locations
· Cable types, routes and protection
· Earthing and bonding arrangement
· Equipment serials and firmware versions
· Deviations from the approved design, with reasons
Practice question bank
Shared diagnostic core — practice questions
Method and safety questions phrased the way each region's examiners phrase them.
Exam-style questions with the reasoning behind every answer.
Level 1Level 2Level 3
Practise with Maya
Question 1 of 5Score 0/0
A hybrid system has been switched to standby at the inverter. What is now safe to work on?
Explanation cards
Faults that waste a whole day
The handful of misdiagnoses that account for most wasted visits — the correct call, and the reasoning that usually wins instead.
Correct answer, why it is correct, and the mistakes people make.
Level 2Level 3
Inverter showing a generic fault code
Verify DC voltage, polarity, earthing and battery voltage against the inverter's operating window before condemning the unit.
A fault code names the protection that operated, not the cause. Most are downstream of a DC-side or storage condition.
× Replacing the inverter first and inheriting the same code
× Reading the display instead of measuring at the terminals
× Ignoring the fault-history timestamps that would have shown the correlation
Battery not charging, or charging very slowly
Measure voltage at the battery terminals under charge and compare it with the voltage at the charge source. The difference tells the story.
Charge settings, high-resistance connections, temperature sensing and one weak cell in a bank all present the same way.
× Replacing the bank without checking the configured charge profile
× Missing a single weak battery dragging a string down
× Treating a BMS temperature limit as a hardware fault
Worked yesterday, dead today
Visual inspection plus systematic voltage checks from source to load, looking for an intermittent connection, a loose connector, a failed surge device or a breaker that was never properly reset.
Sudden total loss is almost always a connection or a protective device, not a degraded component.
× Starting with the most accessible component instead of the source-to-load path
× Resetting a breaker without asking what tripped it
'Low power' on an otherwise working system
String-by-string current comparison under similar irradiance isolates it in under thirty minutes.
Shading, soiling, mismatch or one underperforming string all read as generic underproduction at the meter.
× Jumping to inverter replacement
× Comparing against nameplate rather than a condition-corrected expectation
Nuisance tripping of residual-current or earth-leakage protection
Insulation-resistance testing plus visual inspection of terminations and cable routes, correlated with weather.
Moisture ingress, damaged insulation and incorrect earthing arrangements trip protection that is working correctly.
× Replacing the protective device
× Testing at midday when the fault only appears after overnight rain
Scenario labs
Safety-fail scenario labs
Graded labs from the curriculum where an unsafe selection ends the attempt. Work these until the order is automatic.
Graded scenario labs — a safety-critical error still fails outright.
Level 1Level 2Level 3
Isolating a storage system in the right order
Storage holds energy independently of sun and grid. The order is the assessment.
Isolation fault — finding the string without becoming the path
Weather-correlated isolation faults reward patience and punish shortcuts.
Capstone stage 1 — arrival and safety
A safety failure resets the stage rather than letting you carry on.
Timed mock assessment
Core method mock — 45 minutes
A timed check on the shared core before you sit a region mock. Method and safety only; no regional codes.
Sit it against the clock and read the score report honestly.
Level 1Level 2Level 3
Core method mock · 45 minutes · pass mark 70%
Five method questions followed by three graded scenario labs. Work as you would on site: state the isolation before you measure.
· Storage isolation order — Graded on order, not speed.
· Isolation fault narrowing — Eliminate branches; do not sample randomly.
· Arrival and safety — One unsafe selection resets the stage.
Maya · Your diagnostic coach
45 minutes · 5 questions · pass mark 70%
Any safety-critical error fails the lab or assessment outright, whatever the rest of the answer scored. There is no partial credit for an unsafe method.