Industrial Battery Storage (BESS) EPC

Battery energy storage EPC, sized to your peak and backup need

Storage that holds your plant up when the grid lets go.

Behind-the-meter battery storage, engineered as a plant and not sold as a box. LFP racks and grid-forming PCS from two approved vendors, with the BESS switchboard, protection and EMS manufactured and tested at our own works in Kotambi.

Get a free feasibility study Size my storage

LFP onlyno NMC in industrial sites

UL 9540Atested racks, NFPA 855 layout

Back to backOEM rack warranty, passed through in writing

One teamdesigns, builds, commissions and maintains

Everything between the PCS terminals and your main bus is ours: built, tested and commissioned by WTS.

What storage is for

Three jobs, usually two of them at once

Most industrial storage pays for itself on the first two and earns its keep on the third. We size for whichever combination your bills and trip log point to.

Cut demand charges

The battery discharges during your afternoon peak, so the maximum demand the DISCOM bills is lower every month. This is the saving that arrives whether or not the grid ever trips.

Indicative, from design: 15 to 25 per cent off billed kVA

Replace DG running

Short and medium outages are carried by the battery instead of the DG set. Diesel at ₹18–25 a unit becomes stored grid or solar power at a fraction of that, and the DG becomes the backup to the backup.

Indicative, from design: 70 to 90 per cent fewer DG hours

Hold the critical bus

A grid-forming PCS carries your critical loads through the trip with no interruption, then hands over to the DG or resynchronises to the grid. For continuous processes this is the number that matters.

Typical: seamless ride-through, DG start in the background

What storage does to a typical day. The DISCOM bills you on the orange line, not the black one, and the difference is paid every month whether or not the grid trips.

Indicative calculation; verify with engineering before ordering.

What is in a WTS BESS

Five parts. We make the ones that decide whether it works.

A battery rack is a commodity, and we buy the best one for the job from two approved suppliers. The switchboard that ties it to your plant, the protection that keeps it safe and the EMS that runs it are not commodities, and we build them.

LFP battery racksIEC 62619 and UL 9540A tested, BMS proven with the chosen PCS, manufacturer's warranty passed through back-to-back

Power conversion systemGrid-forming PCS with proven overload curve and DG synchronisation, Indian-made preferred, manufacturer's warranty passed through

Made by WTSBESS PCCIncomer, PCS feeders, protection relays, metering, tie breaker, built and factory-tested at Kotambi

Made by WTSProtection and islandingProtection coordination study, anti-islanding and intentional-islanding scheme, DISCOM-approved settings

Made by WTSEMSPeak-shaving, DG and solar coordination, state-of-charge management, monitoring and monthly reporting

Fire detection and suppression, enclosure cooling and the civil plinth are specified by us and supplied by insurer-accepted vendors.

Safety is a design decision, not a certificate

Every storage project we build follows the same rules. They are not negotiable, including when they cost more.

LFP onlylithium iron phosphate chemistry, no NMC in industrial installations

UL 9540Athermal-runaway tested racks, IEC 62619 cells and modules

NFPA 855clearances, separation and ventilation in the layout, with suppression and detection designed in

Insurer sign-offlayout and suppression reviewed with your insurer before installation, not after

Site staff are trained on electrical safety and hazardous-area awareness; a permit-to-work system runs on every site.

Standard systems

Two sizes cover most plants

S-250

125–250 kW / 261–500 kWh

One or two cabinets with a WTS interface panel and EMS. For a 250 to 750 kVA plant with trips and DG pain, where the problem is reliability more than demand charges.

Conversion: Hybrid inverter or small PCS
Footprint: About the size of two large switchboards, indoors or outdoors
Indicative price: ₹0.6–1.3 Cr installed
Build time: Schedule given with the proposal, approvals running in parallel

Ask for an S-250 study

M-1000

1 MW / 2 MWh

A containerised system with grid-forming PCS, WTS BESS PCC and EMS. For a 1 to 3 MVA plant, where demand charges and DG replacement both pay and the critical bus must ride through.

Conversion: Grid-forming PCS, DG and solar synchronisation
Footprint: One 20-foot container plus PCS and switchboard, NFPA 855 clearances
Indicative price: ₹3.5–4.5 Cr installed
Build time: Schedule given with the proposal, approvals running in parallel

Ask for an M-1000 study

Prices depend on site conditions, cable runs, fire system and approval scope, so we quote against your single-line diagram rather than publishing a rate.

Warranty and performance

What is guaranteed, and who stands behind it

Item	Warranty	Backed by
Battery racks	Manufacturer's warranty in years or cycles, with an end-of-warranty capacity floor	Rack manufacturer, passed through to you in writing
PCS	Manufacturer's warranty	PCS manufacturer, passed through
WTS switchboard, protection and EMS	Workmanship warranty, with OEM terms on relays and metering, written into the proposal	Wisdom Techno Solutions

Questions we are asked about storage

How many hours of backup do I get?

It depends on what you back up. A 1 MW / 2 MWh system carries a 1 MW critical bus for about two hours, or a 300 kW critical bus for most of a shift. We size the critical bus first, then the battery.

How long does the battery last?

LFP racks carry the manufacturer's warranty in years or cycles, with a capacity floor, passed through to you back-to-back in writing. The EMS is tuned to keep the system inside its cycle budget.

Will it work with my existing DG?

Yes. The PCS synchronises with the DG so the two share load, and the EMS decides when the DG starts. Most customers find the DG runs a fraction of the hours it did before.