EthosPowerAIThe battery arrives on a Thursday, on a truck that cannot wait, and the first thing anybody learns about the installation is whether the room was ready. Everything that goes wrong in the first year of a standby system was usually decided in that hour: the floor that was never assessed, the eyewash that was ordered but not plumbed, the torque wrench that was in the other van. What follows is the sequence that avoids that hour, from the site walk to the commissioning sheet.
Ready the site before the truck
The floor must carry the string, which for industrial batteries means somewhere between 1,500 and 3,000 kg per square metre and a structural opinion for anything above ground level; the room must hold 20 to 25 °C, because every degree above that shortens the life of a lead-acid cell and the manufacturer's warranty is written at 25; and the ventilation must already meet IEEE 1635 with ASHRAE 21 before a single cell is charged. The order matters. The safety fittings are not optional and not later. An eyewash station giving fifteen minutes of continuous flow and a safety shower delivering at least 20 gallons a minute both sit within six metres of the cells, and the spill containment is in place before the electrolyte is.
Protect the people
Everyone in the room wears acid-resistant clothing, goggles or a face shield, and works with insulated tools rated for the DC voltage of the string, which is a higher bar than the AC rating on the same tool. They have been trained in handling the chemistry in front of them and they know what to do when something goes wrong, which for a flooded cell means where the neutraliser is and for a lithium cell means where the exit is. A crew that has to ask is not ready.
Install in order
Receiving comes first: check the shipment against the order, inspect for transit damage, check electrolyte levels on flooded cells and measure the open-circuit voltage of every cell before it leaves the pallet, because a cell that is wrong now will be blamed on the installation later. Positioning follows, never lifting by the terminals, keeping 10 to 15 mm between cells for air, and levelling on the rack. Connection means the manufacturer's torque, typically 11 to 16 Nm on an M8 bolt, anti-corrosion compound on the terminals, and the temperature sensors fitted where the drawing says. Torque is not a feel. Commissioning records the cell voltages against specification, the baseline impedance of every cell, the initial charge to the manufacturer's procedure, and every reading in a form the next engineer can find.
Chemistry changes the checklist
A lithium installation needs Class D fire suppression, thermal-runaway detection, a battery management system that has been integrated and verified, and cell balancing confirmed before handover. A nickel-cadmium installation needs cadmium handling procedures, tools that resist the alkaline electrolyte, the manufacturer's first-charge protocol, typically to 140% of rated capacity, and a check of electrolyte specific gravity. A lead-acid installation, valve-regulated or flooded, needs hydrogen detection, the acid-resistant floor verified, the ventilation calculation on file and the float voltage corrected for the room's temperature.
The four mistakes that recur
Torque, both under and over, is the first, because a loose joint heats and a crushed post cracks. The ventilation calculation that was never done is the second, and hydrogen finds it. Mixed battery types in a single string is the third: different ages and chemistries in series share current badly and the weakest cell decides the outcome. The fourth is the missing thermal barrier between lithium modules, which is a fire-safety requirement rather than a preference.
Write it down, then hand it over
The record holds the installation date and crew, the baseline voltages and impedances, the torque values applied, every deviation from the specification and the commissioning results, because in five years somebody will need to know whether a cell that is failing was always the odd one. The operating staff then need the normal parameters, the alarm conditions and their responses, the emergency shutdown and the routine inspection schedule, in writing and in a place they will look.
If you are planning an installation, the sizing starts at ebatt.ai and the questions about the room start on the contact page.