Backup power and storage providers

Stationary batteries that still hold their value at the end of the contract

Stationary batteries lose capacity quietly, and a battery management system reports faults rather than trends, so a pack degrading faster than the ones beside it looks healthy until it fails an acceptance test.

BMB keeps a lifecycle record per pack: state of health, temperature exposure, cycle depth and the charging behaviour behind them. It tells you which units need attention now, and what the site is worth when the contract ends.

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Most operators find out too late. The battery management system reports faults, not trends, so a pack that is quietly losing two percent more capacity a year than its neighbours looks healthy right up until it fails an acceptance test. By then the warranty window has usually closed and the evidence to make a claim was never recorded.

We read the same data the BMS already produces and turn it into a lifecycle record: state of health per pack, temperature exposure over time, cycle depth, and the charging behaviour that drove it. That record travels with the asset.

Health charging

Charge windows, rates and rest periods set from the condition each pack is actually in, so every cycle adds less wear than a single fleet-wide rule would.

Battery reporting

A state-of-health record per pack — capacity, cycles, temperature exposure and faults — in a form an auditor, a lessor or a warranty desk will accept.

Range prediction

A live range figure per vehicle, built from measured pack condition plus the route, the load and the weather, instead of a number printed when the battery was new.

Battery optimisation

Charging planned across every asset at once, against tomorrow’s routes, the power the site actually has and the tariff windows it pays.

Anomaly detection

Cell imbalance, thermal drift and enclosure faults flagged while they are still trends, rather than at the point the battery management system raises an alarm.

Metric	Without charging optimisation	With BMB smart charging
Expected battery lifespan	6–7 years, around 2,800 full cycles	8–9 years, around 3,600 full cycles
Annual capacity degradation	4.5–6% per year	2.5–3.5% per year
State of health after 5 years	Around 72%	Around 84%
Residual value after 5 years	38–45% of purchase price	52–60% of purchase price
Warranty exposure	Degradation claims common at end of term	Documented charging history supports the claim

Metric

Without charging optimisation

With BMB smart charging

Expected battery lifespan

6–7 years, around 2,800 full cycles

8–9 years, around 3,600 full cycles

Annual capacity degradation

4.5–6% per year

2.5–3.5% per year

State of health after 5 years

Around 72%

Around 84%

Residual value after 5 years

38–45% of purchase price

52–60% of purchase price

Warranty exposure

Degradation claims common at end of term

Documented charging history supports the claim

Charging tuned to the pack, not to the fleet average

Health charging sets how far, how fast and how long each battery charges from the condition that pack is actually in, rather than from one profile applied to everything on site.

What it is

A charging policy that reads state of health, temperature and cycle history per pack and turns them into the instruction the charger receives: the target state of charge, the rate it is reached at, and how long the pack is left sitting full before it is used.

It runs on the chargers and battery management systems already installed. What changes is the instruction, not the hardware, so a site can move from a single overnight rule to per-pack charging without any work on the asset itself.

What problem it solves, and for whom

Most fleets charge everything to full overnight because it is the simplest rule to operate. It is also the most expensive one for the battery: a pack held at one hundred percent in a warm depot ages measurably faster than one charged to what the next day’s route actually needs.

Charge point operators see the mirror image. A site tuned for throughput pushes high rates into packs that are already warm, and the cost of that lands on someone else’s asset until it comes back as a warranty argument nobody has the data to settle.

The business case

The direct effect is slower degradation: less time at high state of charge, fewer high-rate sessions into warm packs, and rest periods that suit the pack rather than the shift pattern. On a fleet that replaces batteries on condition rather than on schedule, that moves the replacement point out by whole quarters.

The second effect is evidential. Every session is recorded against the pack, so the way a battery has been treated becomes something you can show a lessor, an insurer or a warranty desk instead of something you assert.

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