Energy Storage and Batteries Editing and Proofreading Services

A battery is sold on the day it is installed and judged in year eight. Between those two points it loses capacity, and everything that determines whether that loss is acceptable — how much, how measured, under what use, and what happens if it is worse — sits in a warranty document that the buyer read once and the operator has never read at all.

We edit what storage developers, manufacturers and integrators produce — capacity warranties and degradation guarantees, performance guarantee schedules and availability terms, operation and maintenance agreements, augmentation plans and capacity maintenance strategies, safety documentation and thermal runaway response material, grid connection and compliance documentation, commissioning and acceptance test procedures, revenue stacking and market participation descriptions, planning and permitting submissions, community and neighbour communications for sites, and technical proposals for offtakers and investors. Our editors work on the promise about year eight.

The capacity warranty is where storage projects are made financeable or unbankable, and its failure is a single retention percentage detached from the conditions that produce it. A guarantee of seventy per cent at year ten means nothing without the duty cycle it assumes. We work through these so the warranted retention is stated alongside the operating envelope it depends on — cycles per year, depth of discharge, temperature range, charge and discharge rates — since exceeding any of these voids the promise and operators routinely do so without knowing; so the measurement method is specified precisely, covering when the capacity test is run, at what state of charge and temperature, who witnesses it and how the result is calculated, because a warranty with no test procedure is a warranty with no trigger; so the remedy is stated as an obligation with a timescale rather than as a right to discuss, and the difference between repair, replacement and augmentation is spelled out; so augmentation assumptions are made explicit, given that a plan relying on adding cells in year six is a plan relying on cells being available and compatible in year six; so throughput and calendar ageing are treated separately, as a lightly cycled system fails a throughput-based warranty for entirely different reasons; and so the exclusions are listed in one place rather than distributed. Warranties written this way are read by lenders without a query list.

Everything you send is treated in confidence, including technical data, warranties and commercial terms. We are editors rather than engineers, technical advisers or lawyers, and we offer no view on battery performance, degradation or contractual risk. What we can do is make the promise and its conditions legible in the same place.