A founder who runs a stringer and laminator line for modules often adds a battery pack bench next, and a flange and tower shop after that. The question comes up at the first review meeting. Can the roster, the grade chart and the induction we wrote for the module hall simply be photocopied for the new shed? Mostly no. Some of it travels well. Some of it will cause trouble if it is copied.
Everything below sits inside the group described on the solar and renewable energy equipment hub. The aim is simple. Separate what is shared from what must be rebuilt per product. Then two or three lines can run under one plan, and one line's habits do not spoil another.
What really carries across
Four pieces of HR design are product-neutral. They work in the module hall, on the pack bench and in the tower bay because they describe people and stations, not products.
- A station skill matrix on the wall. It shows who can run the tabber alone, the cycler alone or the root pass alone.
- A grade ladder where each step needs a practical sign-off by a senior hand, not a classroom pass.
- A roster rule that shows nights and overtime per person on one visible sheet.
- A joining file that holds the offer, the induction record and the first-month review in one place.
Build these once at group level. Each new line then only brings its own test pieces and its own hazard list.
What must bend for each product
The module line is a flow line. Cells go through the stringer, get tabbed and laid up with EVA and backsheet, then enter the laminator. A late technician stalls the whole conveyor, so attendance and handover timing matter more here than any single grade. Flasher curves and electroluminescence images are read by a small group, and junction-box potting and sealant cure add more handover detail.
The pack bench is a handling job. Cells are sorted by capacity, spot-welded with nickel strip, wired to a BMS board, then put on a formation cycler for hours. Hazard sits in a shorted spanner, a dropped cell, a swollen pouch or an unattended charge, and thermal runaway is the fear behind every night rule. Night cover for the cycler room is the sharpest roster question.
The tower and flange shop works on rolled plate and ships to a nacelle or blade partner. Fit-up, submerged-arc welding, grit-blasting and bolt tensioning each depend on a few senior people and on crane crews who must work in step. Cycle times are long, so one absent welder can idle a bay for days.
Two more product lines show the same pattern. An inverter floor runs reflow ovens, conformal coating and hipot testing, so its scarce people are the test technicians and the rework operators. A mounting structure shed runs roll-formers for purlins, then galvanising dips, so its pressure points are the roll-former setter and the dip bath crew. Neither of them looks like a module hall or a pack bench. A single induction cannot serve all five.
Tests that cannot be swapped
A hiring test should look like the first real task at that station. Three examples show how far apart the sheds are.
- Module hall: tab and string six cells on a practice stringer, then check for micro-cracks and misaligned ribbon before the layup table.
- Pack bench: spot-weld a nickel strip on scrap cells, then pull-test the joint by hand and explain what a cold weld looks like.
- Tower shop: tack and fit up two rolled-plate edges to a drawing, then name the root-pass sequence and the grit-blasting check before painting.
A person who passes one test cannot be assumed to pass another. Keep the test sheets separate and keep the sign-off with a senior hand from that shed.
Handover at shift change
Each shed hands over differently. The module hall passes on laminator temperature drift, cell batch changes and frame glue cure times. The pack bench passes on which racks are on formation, which cells failed grading and which BMS boards are awaiting firmware. The tower shop passes on which flange is clamped, which seam is half welded and which crane slot is booked. Use a one-page handover note per shed. A common sheet with blank boxes gets ignored.
A planning sequence for two or three lines
- 1
List scarce roles per line
Name the three or four people whose absence stops each line: laminator lead, formation cycler technician, root-pass welder. Mark who covers each.
- 2
Write one induction spine
Gate rules, handling basics and product awareness are common. Add a separate half-day module for each line's own hazards.
- 3
Set tests per station
A tabber test, a spot-weld pull check and a fit-up test have little in common. Keep each short and practical.
- 4
Share grade names, vary the content
Everyone knows what Grade 2 means, but the evidence for Grade 2 differs by shed.
- 5
Review together once a quarter
Look at exits, absences and open vacancies by line on one page, so a pattern in one shed is seen early.
For the safety side of the pack bench, the battery pack makers safety page shows how sections are usually divided. For the tower side, the wind component makers training page covers how senior welders pass skills on.
Pay and grading across lines
Do not carry a pay rule across because it worked once. A laminator lead and a root-pass welder may both be called senior. Their markets differ. So does the cost of losing each. Use common grade names, then set bands by trade. Where the group is still small, a short review by an outside adviser can fix the bands in one sitting. See HR process consulting for how that is usually run.
Signs you are copying too hard
- Induction videos that show the module line to pack bench recruits.
- Night cover rules that assume a conveyor, applied to a cycler room.
- A single skill test for welders and technicians alike.
- Exit interviews that all say the same thing about unclear overtime.
If two of these appear, stop and rebuild that part for the shed concerned. If you want help, send your line list through the requirements form and describe each shed in a few lines.
