FlowMarket
Where to find battery energy storage: FlowMarket is a B2B sourcing network powered by an AI agent. You describe the requirement — use case, power and energy rating, chemistry, cycle expectation, grid connection, fire safety and siting — and the agent matches you with suppliers and integrators of storage systems, then requests quotes, warranty terms and lead times so you can compare them in one place.
Sourcing battery energy storage
Battery storage has moved from pilot projects to ordinary industrial infrastructure faster than most buying processes have adapted. The technology is mature enough to buy with confidence; what is still immature is the way systems get specified, which is why two quotes for the same site can differ by a factor of two and both be honest.
The difference is almost always the use case. Storage that shaves demand peaks, storage that shifts solar output into the evening, storage that provides backup and storage that trades on price signals are four different machines wearing the same container, and a supplier who does not know which one you want cannot size it.
Power and energy are two separate numbers
A storage system is described by its power in kilowatts or megawatts — how fast it can charge and discharge — and its energy in kilowatt-hours or megawatt-hours, meaning how long it can sustain that. The ratio between them is set by the application, and getting it wrong is the most common and most expensive specification error in the field.
Peak shaving usually wants high power for short bursts; solar time-shifting wants more energy at modest power; backup depends entirely on how long you need to ride through. Describe the load profile and the objective rather than naming a size, and ask suppliers to show the sizing calculation against your actual metered data. Half-hourly consumption data for a year is the single most useful thing you can attach to the enquiry.
Chemistry, safety and the insurer
Lithium iron phosphate has become the default for stationary storage because it is more thermally stable and cheaper per kilowatt-hour than nickel-based chemistries, at the cost of energy density that matters far less in a container than in a vehicle. Where energy density does matter, NMC is still used, with a correspondingly heavier safety case.
Fire safety is where projects most often stall. Separation distances, deflagration venting, detection and suppression, and what happens to a container in a thermal runaway are questions your insurer and the local authority will ask, and the answers shape the site layout. Involve both early, ask for the system's fire testing evidence rather than a general assurance, and treat a supplier who has been through this process before as worth a premium.
Cycle life, warranty and the honest question to ask
- Cycles are not calendar life — a system warranted for a number of cycles ages on the calendar too, and both limits apply.
- Throughput warranties — often expressed as total megawatt-hours delivered, which is a more honest figure than a cycle count.
- Capacity retention — the guaranteed remaining capacity at end of warranty, typically a percentage; ask what happens if it is missed.
- Depth of discharge and temperature — both change ageing substantially, and warranty conditions usually constrain them.
- Augmentation — adding capacity later to hold output constant is planned into large systems; ask whether yours allows it.
The grid connection and the regulatory position
As with solar, the network operator often decides what is possible. Whether the system can export, at what power, and under what control obligations affects the business case more than the equipment price does, and connection processes run on their own timetable.
The revenue side deserves the same scrutiny. Peak shaving and self-consumption savings are relatively predictable; grid service and trading revenues depend on markets that change, and a business case leaning on them should be stress-tested. Ask suppliers to show the case with and without market revenues rather than accepting a single optimistic figure.
The system is more than cells
What you are buying is an integrated system: cells, battery management, inverter, thermal management, controls, protection and an energy management system that decides what the storage does minute by minute. That last piece determines whether you get the savings that justified the purchase, and it is the least examined part of most quotations.
Ask how the EMS integrates with your existing metering and building or plant control, whether it can be reconfigured as tariffs change, who has access to the data, and what happens to the control system if the supplier stops trading. A container of cells with a control system you cannot adapt is an asset that quietly stops earning.
How the AI agent matches suppliers
The agent reads your requirement rather than your keywords. It searches the FlowMarket network and connected industrial directories together, scores every candidate on how well it answers what you described — use case, power and energy class, chemistry, fire and siting requirements, grid code compliance, EMS capability, warranty structure and region — and drops anything that does not clear the bar. Each match comes back with a plain-language reason, so a cell manufacturer, a system integrator and an EPC contractor never look the same.