Battery storage
Cabinets and containers: battery management system (BMS), power conversion system (PCS), cooling, detection and suppression, capacity testing.
Operations & maintenance
Looked after for its whole life
Batteries, chargers and the solar and controls around them are long-lived assets. Problems often surface early, and capacity fades slowly. We monitor, maintain and test them, keep the records the rules ask for, and report every month, including for systems someone else installed.
What we look after
One team for the whole site
Storage, charging and the equipment around them, under one annual maintenance contract (AMC) and one monthly report.
EV chargers
AC, DC and light-EV points: connectors, cables, power modules, Open Charge Point Protocol (OCPP) connectivity.
Solar tied to storage
Inverters, strings and protection where solar feeds the battery or the chargers.
Genset hybrid controls
Changeover, synchronising and hybrid-controller settings, coordinated with your genset service provider.
Monitoring & EMS
Energy 107 schedules, limits and alarms in the energy management system (EMS), kept in tune with how the site runs.
Switchgear & metering
Thermographic surveys, protection checks and metering records for the parts that connect it all.
Takeovers
Taking over someone else's system
Some systems lose their installer or their warranty support along the way. We start with a baseline, so we both know the condition we are taking on.
Document review
Drawings, test reports, warranty terms
Baseline inspection
Visual, thermography, alarms, logs
Capacity & efficiency test
IEC 62933-2-1 for batteries; functional tests for chargers
AMC proposal
Scope, exclusions, spares, what must be fixed first
Deliverable:Baseline report
Book a baseline inspectionBook a baseline inspectionBattery upkeep
A maintenance calendar for batteries
Typical scope. Final frequencies follow the maker's manual and your AMC.
Continuous
- Remote monitoring of alarms, temperatures, state of charge
- Alarm response per the agreed escalation
Monthly
- Visual inspection; enclosure, doors, seals, fencing
- HVAC or liquid-cooling checks; filters
- Review of BMS logs and cell-voltage spread
Quarterly
- Thermographic scan of DC and AC connections
- Fire and gas detection checks
- Emergency-stop and door-alarm tests
Annual
- Torque re-checks on terminations
- Available-energy and round-trip-efficiency test (IEC 62933-2-1)
- Suppression-system inspection with the fire contractor
- Earthing resistance; transformer checks
- State-of-health review against the warranty curve; augmentation planning
Charger upkeep
Keeping chargers in service
Many charger faults show up in the management software, and some can be cleared from there. The rest need hands, tools and the right spares.
Remote
- Heartbeat and connectivity alarms
- Error codes and stuck sessions
- Remote reset and release of stuck connectors
- Firmware updates under change control
On site
- Connector and cable inspection, including pin wear and burn marks
- Thermal scans of panels and terminations
- Filters and fans in DC power modules
- Torque checks
- RCD trip and earth-continuity tests to the maker's instructions
- Surge-protection status
- Enclosure seals, signage and lighting
- Payment terminal and network checks
Spares we plan for
- Connector and cable assemblies
- Power modules
- Contactors and surge protectors
- Control and communication boards
How we measure it
- Availability
- Time a charger can start a session ÷ scheduled time, excluding agreed exclusions such as grid outages.
- Session success rate
- Sessions that start and deliver energy ÷ sessions attempted.
- Mean time to repair (MTTR)
- Average time from a fault being reported to the charger working again.
We define these terms in every AMC and report them monthly. We don't publish availability percentages; targets are agreed site by site.
Reporting
A monthly report you'll read
Short, the same layout every month, and written for the person who signs off the bills.
- Energy charged and discharged; round-trip efficiency (AC to AC)
- Availability, with exclusions listed
- Alarms raised, responses and time to resolve
- State of charge and state-of-health trends
- Peak demand against the set limit
- Genset running hours and starts
- Charger sessions, availability and faults
- Maintenance done and next actions
Records
Records the rules ask for
Part of every AMC: the records inspectors and auditors ask to see, kept in order and ready to hand over.
- Charging stations: inspection, test and assessment records kept for at least 7 years, ready for the inspector (CEA Safety Regulations 2023, reg 128).
- Batteries above 650 V: from 1 April 2027, the documents the independent fire-safety audit and the Electrical Inspector will ask for (CEA Safety Amendment 2026). Notifiedin force 1 Apr 2027
- Periodic Electrical Inspectorate inspections and their follow-up.
- Annual energy data for public chargers, where national reporting applies (MoP guidelines 2024).
- Battery end-of-life and extended producer responsibility (EPR) paperwork (Battery Waste Management Rules 2022).
Sources
- CEA, CEA (Measures relating to Safety and Electric Supply) Regulations, 2023, Chapter XI (opens in a new tab) (8 June 2023).
- CEA, CEA (Measures relating to Safety and Electric Supply) Amendment Regulations 2026 (opens in a new tab) (Gazette, 30 March 2026).
- Ministry of Power (copy hosted by WBSEDCL), Guidelines and Standards for Electric Vehicle Charging Infrastructure, 2024 (opens in a new tab) (17 September 2024).
- CPCB, Battery Waste Management Rules, 2022 (opens in a new tab) (22 August 2022 (amended 2025)).
Rules change. We check the current position for every project.Last reviewed
AMC
What an AMC spells out
No guesswork about who does what, how fast, and what's excluded.
Scope
Which equipment, which visits, which tests.
Response
How alarms are handled and how fast someone attends; agreed per site.
Spares
What we hold, what the owner holds.
Exclusions
Grid outages, vandalism, misuse, maker warranty items.
Measures
Availability, session success rate and repair time, defined as above.
Review
An annual review of scope and results.
Questions about O&M
Yes. We start with a baseline inspection and capacity test, so we both know the condition we are taking on.
We follow the maker’s maintenance manual and use approved parts and log everything, so warranty claims are backed by records. Where the maker requires its own engineers for certain work, we coordinate with them.
Yes, if the chargers speak OCPP and we are given access to the management software, or the network shares alerts with us.
We look after the hybrid controls, changeover and synchronising settings, and coordinate with your genset service provider for the engine and alternator.
Existing systems
Already have a system? Start with a baseline check.
Batteries, chargers or solar, ours or someone else's: we'll start with an inspection and a baseline test.