A battery energy storage system preventive maintenance schedule lists the checks and jobs done on the equipment at fixed intervals, how long each takes, and in what order of frequency, so problems are found before the battery energy storage system fails. This page gives the schedule used in the PlantOps360 task library for battery energy storage system (bess) and power conversion system), which follows common industry practice for general-purpose equipment. It is also searched for as BESS, battery storage, lithium ion battery, PCS.
The maker’s manual and your site safety procedures always come first where they differ. Intervals set by law differ by state.
Battery energy storage system preventive maintenance schedule and checklist
| How often | Task | Estimated time |
|---|---|---|
| Daily | Check state of charge, cell temperatures, alarms and cooling status (remote) | 10 min |
| Weekly | Check container HVAC, fire detection and gas detection status | 20 min |
| Monthly | Visual check of modules, cables and terminals; check PCS cooling | 60 min |
| Quarterly | Thermography of DC and AC connections; check BMS balancing and insulation monitor | 120 min |
| Half-yearly | Capacity (state of health) test and BMS calibration; firmware updates | 240 min |
| Annual | Annual service of PCS, transformer and fire suppression system; safety function test | 480 min |
Battery energy storage system maintenance frequency and yearly workload
At the estimated times, one battery energy storage system needs about 114 hours of preventive maintenance a year. The biggest single job is “Annual service of PCS, transformer and fire suppression system; safety function test” at 480 minutes, done annual. Multiply by the number of units you have to see the workload for your plant.
| Frequency | Tasks | Time per round | Hours per year |
|---|---|---|---|
| Daily | 1 | 10 min | 60.8 h |
| Weekly | 1 | 20 min | 17.3 h |
| Monthly | 1 | 60 min | 12.0 h |
| Quarterly | 1 | 120 min | 8.0 h |
| Half-yearly | 1 | 240 min | 8.0 h |
| Annual | 1 | 480 min | 8.0 h |
What goes wrong on a battery energy storage system without preventive maintenance
- Cell imbalance and thermal events
- Container HVAC faults
- Fire and gas detection faults
- Loose connections
What to watch between services
- State of charge and cell temperatures
- HVAC, fire and gas detection
- Terminals and cables
Safety and statutory notes for battery energy storage system maintenance
Battery storage can burn and release toxic gas. Fire and gas detection and the emergency plan are tested on the schedule.
Where a battery energy storage system preventive maintenance schedule is used
This equipment is used in the industries below. Each link opens the preventive maintenance schedule guide for that industry, and the maintenance software page where we have one.
- Preventive maintenance schedule for thermal and hydro power plants · maintenance software for power plants
- Preventive maintenance schedule for solar, wind and renewable energy plants · maintenance software for renewable energy
- Preventive maintenance schedule for hotels, malls, offices and campuses
- Preventive maintenance schedule for data centres, it parks and telecom sites
- Preventive maintenance schedule for railways, metro, airports and depots
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Browse the full list of equipment preventive maintenance schedules (317 types).
Run this battery energy storage system schedule in maintenance software
In preventive maintenance software, each row above becomes a recurring task on the asset with its checklist, time estimate and parts. Tasks can be triggered by calendar date, running hours, meter readings or production cycles, each completed task is recorded with the person and date, and a failed check can open a work order. For the method behind it, read the guide to the preventive maintenance schedule, or use the free generator to get a 12-month plan for your whole equipment list.
Build my preventive maintenance schedule (free Excel)
Frequently asked questions
How often should a battery energy storage system be serviced?
In our schedule a battery energy storage system has 6 tasks: 1 daily, 1 weekly, 1 monthly, 1 quarterly, 1 half-yearly, 1 annual. The biggest job is “Annual service of PCS, transformer and fire suppression system; safety function test”, which is done annual. Always follow the maker’s manual where it gives a different interval.
What is included in battery energy storage system preventive maintenance?
It covers routine checks and jobs such as “Check state of charge, cell temperatures, alarms and cooling status (remote)”, “Check container HVAC, fire detection and gas detection status”, “Visual check of modules, cables and terminals; check PCS cooling”, up to the annual overhaul or inspection. The full list with times is in the table above.
How many hours of maintenance does a battery energy storage system need per year?
About 114 hours per unit per year at the estimated times in our library, including the daily checks done every day. Use it to plan workload, not as a benchmark.
Is there a free battery energy storage system maintenance checklist?
Yes. The table on this page is a ready checklist. The free preventive maintenance schedule generator turns it into a 12-month Excel schedule for your list of equipment, with monthly workload hours.