Solar Photovoltaic Installation and Maintenance Technician Readiness AssessmentThe array does not switch itself off. Find out what you know before the ladder goes up.

Methodology: Forty original exercises across six formats: twelve single-choice questions, eight true-or-false claims, six select-every-that-applies exercises, five ordering exercises, five match-the-following exercises and four numeric estimation exercises. One response instruction is declared for the whole instrument and it is a KNOWLEDGE instruction: what is the right practice here, never what the respondent would do. Construct statement: this measures what a person knows about the work of a solar photovoltaic installation and maintenance technician, across five units of work, in one sitting of about thirty-five minutes; it does not measure whether the person can do that work with their hands, whether they would follow the practice on a roof under time pressure, their physical fitness for roof work, their competence as an electrician, or anything about their character, and it is not a licence, a certification, a qualification or a permission to work on any installation, energised or not. Content blueprint: the five units of work are drawn from the published structure of the national qualification pack for a solar photovoltaic installer technician, developed by the Skill Council for Green Jobs under the National Skill Development Corporation and approved under the National Skills Qualifications Framework by the National Council for Vocational Education and Training, whose national occupational standards are public in the National Qualifications Register. That structure is used as a content map only. The pack's units on preparing for installation and procuring components map to site survey and sizing here; its civil and mechanical unit to mechanical installation; its electrical unit to electrical termination and earthing; its test-and-commission and customer-orientation units to commissioning and testing; and its maintenance and personal-safety units to operation, maintenance and safety. This instrument is not affiliated with, endorsed by, derived from or a substitute for that qualification, its awarding body, its training partners or its assessment, and it reproduces none of its assessment material. Scoring is a blueprint-weighted content composite. The five parts carry declared weights, electrical termination and earthing 30 per cent, commissioning and testing 25, site survey and sizing 15, mechanical installation 15, and operation, maintenance and safety 15, and those weights are a value judgement about which errors cost most on a real installation, not a measurement; they are printed on the report with the reason for each. The weighting is by content, never by reliability: reliability decides only whether a part may carry a number at all. Every part is chance-corrected against an authored answer prior declared on every exercise, per option on choice items, per position on ordering items, per pair on matching items and per typical value on estimation items, so zero means no better than a respondent answering the way people typically answer, never a uniform draw; the select-every-that-applies exercises are scored in the report as balanced accuracy, the share of required steps selected and the share of unrequired steps left alone, averaged, so that selecting everything and selecting nothing both score one half and land below the typical respondent; those priors are assumptions stated in the open and will be replaced by observed answer shares once live data exist. Reliability is McDonald's omega estimated from item count and a stated assumed inter-item correlation of .24; a part with fewer than eight answered exercises or an omega under .70 carries a three-way placement and no number, and the refusal is printed in its own row of the table. Every reported figure carries its standard error band at 68 and 95 per cent. A sitting with fewer than twenty-four of the forty exercises answered is refused a report and the refusal is printed where the number would have been; an unanswered exercise leaves the numerator, the denominator and the chance term together and never scores zero. The report is a delta report on a first sitting: there is no prior sitting, so the movement column is drawn flat, greyed and dashed and captioned in words, and in the place a comparison would go the page prints the reliable-change threshold, the number of points a second sitting must move, per part and on the composite, for the change to exceed measurement error at 95 per cent, computed as 1.96 times the standard deviation of a declared modelled reference distribution times the square root of twice one minus omega. A change smaller than that is never drawn as an arrow, and the page shows that on a worked example. No country's wiring regulation, standard number or statutory rule is the key of any exercise; voltage classes, earthing principles, isolation order, arc risk and ingress concepts are used generically. No manufacturer, brand, inverter model or installer company is named. Sources drawn on across the construct: Messenger and Abtahi, Photovoltaic Systems Engineering; Luque and Hegedus, Handbook of Photovoltaic Science and Engineering; Deutsche Gesellschaft fuer Sonnenenergie, Planning and Installing Photovoltaic Systems; Dunlop, Photovoltaic Systems; the IEC family of publications on photovoltaic system commissioning, documentation and inspection, and on the safety of electrical installations, described generically; Cadick, Capelli-Schellpfeffer and Neitzel, Electrical Safety Handbook, for isolation and arc risk; Jordan and Kurtz, Photovoltaic degradation rates, an analytical review; Koentges and colleagues, the International Energy Agency task report on the review of failures of photovoltaic modules; Moubray, Reliability-centred Maintenance; Angoff, Scales, norms and equivalent scores, and Cizek and Bunch, Standard Setting, for the blueprint and competence-based assessment tradition; Haladyna, Downing and Rodriguez, item-writing guidelines; McDonald, Test Theory, for omega; and Jacobson and Truax, Clinical significance: a statistical approach to defining meaningful change, for the reliable-change gate. Every exercise is an original work written for this instrument. The instrument is not affiliated with any commercial instrument, certification body, awarding body, training provider or manufacturer.