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Key Facts: C&G 2922-34 Solar PV Exam

100

Practice Questions

OpenExamPrep

~30

Knowledge-Test Questions

City & Guilds

~60 min

Online Test Time

City & Guilds

~75%

Pass Mark

City & Guilds

Section 712

BS 7671 PV Rules

IET

16 A/phase

G98/G99 Threshold

ENA

The City & Guilds 2922-34 Level 3 Award in the Installation and Maintenance of Small Solar Photovoltaic (PV) Systems is the UK qualification that lets competent electricians install and maintain small solar PV systems and work toward MCS registration. Assessment is by an online e-volve multiple-choice knowledge test (around 30 questions, about 60 minutes, roughly 75% to pass) plus a separate practical assessment. Entry requires an existing Level 3 electrotechnical qualification (such as C&G 2357 or 5357) or an equivalent ECS Gold Card. The syllabus covers PV principles and cell technology, system design and sizing, components (panels, inverters and mounting), DC and AC wiring to BS 7671 Section 712, MCS and G98/G99 grid connection, testing and commissioning to IEC 62446-1, and maintenance and safety. This free prep includes 100 research-based practice questions with explanations and an AI tutor.

Sample C&G 2922-34 Solar PV Practice Questions

Try these sample questions to review concepts for the C&G 2922-34 Solar PV exam. Each question includes a detailed explanation. Start the interactive quiz above for the full 125+ question experience with AI tutoring.

1Under Standard Test Conditions (STC) used to rate the peak power of a PV module, what irradiance and cell temperature are specified?
A.800 W/m² irradiance at 20°C cell temp
B.1000 W/m² at 25°C cell temp
C.1000 W/m² at 20°C cell temp
D.1200 W/m² at 25°C cell temp
Explanation: STC defines module ratings at an irradiance of 1000 W/m², a cell temperature of 25°C and an air mass of AM 1.5. The watt-peak (Wp) figure on a module's nameplate is the power delivered under these conditions.
2A PV module's power output is rated in which unit to reflect performance under Standard Test Conditions?
A.Kilowatt-hour (kWh)
B.Watt-peak (Wp)
C.Volt-ampere reactive (VAr)
D.Ampere-hour (Ah)
Explanation: Module nameplate power is expressed in watt-peak (Wp), the maximum power produced at STC. Array size is commonly given in kWp (kilowatt-peak), the sum of the modules' Wp ratings.
3Which PV cell technology typically offers the highest conversion efficiency per unit area in commercial UK domestic modules?
A.Amorphous silicon thin-film
B.Polycrystalline (multicrystalline) silicon
C.Monocrystalline silicon
D.Cadmium telluride thin-film
Explanation: Monocrystalline silicon cells are cut from a single uniform crystal, giving the highest efficiency (commonly 20-22%+) and the best performance in limited roof areas. Polycrystalline and thin-film technologies are generally lower in efficiency per m².
4What is the effect of increasing cell temperature above 25°C on a crystalline silicon PV module's output?
A.Open-circuit voltage falls and power output decreases
B.Open-circuit voltage rises and power output increases
C.Short-circuit current falls sharply and voltage is unaffected
D.Output is completely unaffected by temperature
Explanation: Crystalline silicon has a negative temperature coefficient for voltage (roughly -0.3% to -0.4% per °C), so as cell temperature rises the open-circuit voltage and overall power fall. Short-circuit current rises only very slightly with temperature.
5When designing the maximum number of modules in a series string, which temperature condition produces the worst-case (highest) string open-circuit voltage that must not exceed the inverter's maximum input voltage?
A.Highest expected cell temperature on site
B.Standard Test Condition temperature of 25°C
C.Lowest expected local ambient/cell temperature
D.Nominal Operating Cell Temperature (NOCT)
Explanation: Because Voc rises as temperature falls, the maximum string Voc occurs at the lowest expected cell temperature for the site. The designer applies the module's voltage temperature coefficient at that minimum temperature to ensure the string voltage stays within the inverter's maximum DC input rating.
6In a PV array, how does connecting modules in series affect the electrical characteristics of the string?
A.Voltages add; current equals one module
B.Currents add; voltage equals one module
C.Both voltage and current double
D.Neither voltage nor current changes
Explanation: Series connection (string wiring) adds the module voltages while the current remains that of a single module. Connecting strings in parallel does the reverse — currents add and voltage stays constant — which is how arrays are scaled to suit the inverter's MPPT window.
7What is the primary function of the Maximum Power Point Tracker (MPPT) within a grid-tied PV inverter?
A.Convert DC to AC at 50 Hz grid frequency
B.Adjust operating voltage to harvest maximum power
C.Disconnect the array automatically on grid failure
D.Step up AC voltage to 400 V three-phase
Explanation: The MPPT continuously varies the array's operating point on its I-V curve to keep it at the knee — the maximum power point — as irradiance and temperature change. This maximises harvested energy across the day.
8A grid-connected string inverter for a UK domestic PV system must NOT energise an islanded section of the network during a mains outage. Which protection function ensures this?
A.Surge protection device (SPD) at intake
B.Loss-of-mains (anti-islanding) protection
C.Residual current device (RCD) for earth leakage
D.DC isolator at the inverter input
Explanation: Loss-of-mains (anti-islanding) protection, required for G98/G99 compliance, automatically disconnects the inverter from the network when the grid supply is lost. This protects network operatives working on what they believe is a dead circuit.
9Which Engineering Recommendation applies to the simple 'connect and notify' (fit-and-inform) approach for a single-phase domestic PV inverter rated at or below 16 A per phase?
A.G99
B.G100
C.G98
D.G83/2
Explanation: ENA Engineering Recommendation G98 covers micro-generators up to and including 16 A per phase (about 3.68 kW on single-phase). The installer may commission first and notify the DNO within 28 days. G98 superseded the older G83.
10A single-phase domestic PV system uses an inverter rated above 16 A per phase (greater than approximately 3.68 kW). Which process must be followed before connecting to the grid?
A.Fit and inform within 28 days under G98
B.Obtain G99 DNO approval before connection
C.No notification is required for domestic systems
D.Notify the supplier only, not the DNO
Explanation: Systems exceeding 16 A per phase fall under Engineering Recommendation G99, which requires a formal application to and approval from the Distribution Network Operator (DNO) before the system is connected and energised.

About the C&G 2922-34 Solar PV Exam

The City & Guilds 2922-34 Level 3 Award is the UK qualification for installing and maintaining small solar photovoltaic (PV) systems. It is continuing professional development (CPD) for already-qualified electricians, combining an online e-volve multiple-choice knowledge test (about 30 questions) with a practical assessment, and is recognised as an entry route to MCS registration.

Exam sponsor: City & Guilds. The requirements and fees below concern the certification or admission exam, separate from our free practice resources.

Assessment

An online multiple-choice knowledge test (about 30 questions, ~60 minutes) delivered via City & Guilds e-volve at an approved centre, plus a separate practical assessment; roughly 75% is needed to pass the knowledge test. This practice bank is 100 selected-response items.

Time Limit

About 60 minutes for the online knowledge test

Passing Score

Approximately 75% (knowledge test) plus a pass in the practical assessment

Exam / Certification Fees

Bundled in the training-centre course/assessment fee (course typically £400-£700)

Exam sponsor website

Fees, eligibility, and exam policies can change. Confirm them with the exam sponsor before applying or paying.

Our practice resources: topics covered

We aim to reflect publicly available exam outlines and topic information in our study resources. Coverage, format, and difficulty may differ from the actual exam, and we cannot guarantee that every detail is accurate or current. Confirm exam requirements, fees, and policies with the official exam sponsor.

15%

PV Principles & Cell Technology

How PV cells generate electricity, cell technologies, Standard Test Conditions, I-V characteristics, irradiance and temperature effects, and watt-peak rating

20%

System Design & Sizing

Site survey, orientation and tilt, shade analysis and the MCS kWp x kk yield estimate, series/parallel configuration and temperature-corrected string voltage sizing

18%

Components: Panels, Inverters & Mounting

Module construction and bypass diodes, string/microinverters, MPPT, combiner boxes, MC4 connectors, on-roof/in-roof mounting and structural/wind loads

16%

DC & AC Wiring and BS 7671

BS 7671 Section 712, PV cable to EN 50618, DC isolation, string overcurrent protection, voltage drop, earthing/bonding and surge protection

13%

MCS, G98 & G99 Grid Connection

MCS certification, G98 fit-and-inform and G99 prior-approval, anti-islanding, the Smart Export Guarantee and DNO requirements

10%

Testing, Commissioning & Documentation

IEC 62446-1 DC test sequence, verifying readings against design, commissioning records, EIC and customer handover

8%

Maintenance, Fault-Finding & Safety

Periodic inspection, soiling and shading, hot-spots and degradation, inverter faults, work at height and safe isolation of a dual-supply installation

Preparing for the C&G 2922-34 Solar PV Exam

What You Need to Know

  • Passing score: Approximately 75% (knowledge test) plus a pass in the practical assessment
  • Assessment: An online multiple-choice knowledge test (about 30 questions, ~60 minutes) delivered via City & Guilds e-volve at an approved centre, plus a separate practical assessment; roughly 75% is needed to pass the knowledge test. This practice bank is 100 selected-response items.
  • Time limit: About 60 minutes for the online knowledge test
  • Exam / certification fees: Bundled in the training-centre course/assessment fee (course typically £400-£700) Official sources

Using Our Practice Resources

  • Work through all 125 available questions
  • Review every answer and explanation
  • Track weak areas and revisit them
  • Use our AI tutor for tough concepts

C&G 2922-34 Solar PV: Suggested Study Strategy

1Master the worst-case string-voltage rule: Voc is highest at the LOWEST cell temperature, so always size the maximum modules per string against the inverter's maximum input voltage at minimum site temperature
2Learn the IEC 62446-1 DC test order: continuity/earth, polarity, Voc, Isc, functionality, then insulation resistance, and check polarity before measuring Voc
3Know the G98 vs G99 threshold cold: 16 A per phase (about 3.68 kW single-phase) is fit-and-inform within 28 days; above it needs DNO approval before connection
4Be clear that BS 7671 Section 712 governs PV electrical work and that PV cable is EN 50618 (H1Z2Z2-K) double-insulated UV-rated cable
5Remember the array is a live DC source whenever it is illuminated, so dual-supply labelling, DC-rated isolators and safe isolation are essential
6Complete all 100 practice questions and review every miss with the AI tutor before sitting the e-volve test and practical

Frequently Asked Questions

How many questions are on the City & Guilds 2922-34 Solar PV exam and how long is it?

The 2922-34 award is assessed by an online e-volve multiple-choice knowledge test of about 30 questions lasting roughly 60 minutes, plus a separate practical assessment. City & Guilds does not publish a fixed item count, and you generally need around 75% to pass the knowledge test.

What score do I need to pass the 2922-34 knowledge test?

The online knowledge test pass mark is typically around 75%, and you must also pass the practical assessment. Because the syllabus spans PV theory, design, BS 7671 wiring, MCS/G98-G99 and testing, balanced preparation across every topic is the safest approach.

Who is eligible for the City & Guilds 2922-34 qualification?

It is CPD for qualified electricians. You normally need a Level 3 electrotechnical qualification such as City & Guilds 2357 or 5357, or an equivalent ECS Gold Card, and existing competence in BS 7671 inspection and testing.

What topics does the Solar PV exam cover?

It covers PV principles and cell technology, system design and sizing, components (panels, inverters and mounting), DC and AC wiring to BS 7671 Section 712, MCS and G98/G99 grid connection, testing and commissioning to IEC 62446-1, and maintenance and safety.

Is the City & Guilds 2922 exam taken online?

The multiple-choice knowledge test is delivered online through City & Guilds e-volve at an approved training centre, but there is also a hands-on practical assessment that must be completed in person, so the qualification is not fully remote.

Does 2922-34 let me register with MCS to install solar PV?

Yes. The 2922-34 award is recognised as an entry route to the competence required for MCS installer certification, which (with consumer-code membership) allows your customers to access incentives such as the Smart Export Guarantee.