For testing solar PV installations, special consideration must be given to:

PV arrays generate DC whenever there is light, so DC isolation procedures and awareness that the array cannot be made fully dead in daylight are essential.

The absence of any earth connection on the DC side

DC isolation and continued generation in daylight

The need to test only at night for accuracy

Phase rotation on the single-phase output

What testing consideration applies to installations with solar PV systems?

PV systems require DC isolation and consideration of multiple energy sources during testing.

The array can always be made fully dead at any time

Only the AC output side needs to be considered

A single AC isolation point makes the whole array safe

DC isolation and dual energy source considerations

What additional testing is required for EV charging point installations?

EV charging points require DC leakage testing and verification of protective conductor current limits.

A 250V insulation test with the charger left connected

Phase rotation testing of the single-phase charge point

DC leakage testing and protective conductor current verification

A reduced earth fault loop impedance limit of 0.1 ohms

Free mock exam

EV & Renewables — 18th Edition (BS 7671) Practice

Free topic-focused mock exam: all 9 questions on EV & Renewables, drawn from the wider 18th Edition (BS 7671) bank. 60-minute timer, 70% to pass, worked explanation on every question. Use this when you've taken the full mock once and want to drill the topics you got wrong.

Questions: 9
Time limit: 60 min
Pass mark: 70% · 7/9
Question bank: 9

Free, no sign-up. Retake as many times as you like — the questions are reshuffled, with the answer order changed.

Sample questions

01For testing solar PV installations, special consideration must be given to:
- ADC isolation and continued generation in daylight
- BPhase rotation on the single-phase output
- CThe absence of any earth connection on the DC side
- DThe need to test only at night for accuracy
Why: PV arrays generate DC whenever there is light, so DC isolation procedures and awareness that the array cannot be made fully dead in daylight are essential.
02What testing consideration applies to installations with solar PV systems?
- AThe array can always be made fully dead at any time
- BDC isolation and dual energy source considerations
- CA single AC isolation point makes the whole array safe
- DOnly the AC output side needs to be considered
Why: PV systems require DC isolation and consideration of multiple energy sources during testing.
03What additional testing is required for EV charging point installations?
- AA reduced earth fault loop impedance limit of 0.1 ohms
- BA 250V insulation test with the charger left connected
- CPhase rotation testing of the single-phase charge point
- DDC leakage testing and protective conductor current verification
Why: EV charging points require DC leakage testing and verification of protective conductor current limits.

Common questions

Is the EV & Renewables mock exam free?

Yes — 100% free, no sign-up needed. Questions are pulled at random from a substantial bank, with a worked explanation on every question after you submit.

Can I retake the mock exam?

Yes. Every attempt picks a different random selection and reshuffles the options, so each retake gives you genuinely new questions. No limit on retakes.

Does this count towards the real qualification?

No — this is independent practice material. To gain the actual qualification you need to sit the official assessment through an approved provider.