Custom Energy Storage System Manufacturer.
And Everything That Happens After.
A US energy storage system assembler and build partner for utility/grid-scale, commercial/industrial, and residential ESS programs — cable harness and busbar assembly, BMS controller box build, module-to-pack and enclosure assembly, testing, Class 9 reverse logistics, RMA processing, and refurbishment. US-based and domestic-content ready, with every step under one roof. ISO 9001 + 14001 certified. Lotus, Canton, Michigan, USA.
Batteries Come Back. Most OEMs Don't Have a Plan for What Happens Next.
Battery programs scale fast — until a pack fails in the field and nobody owns the return path. Reverse logistics, diagnostics, module-level repair, refurbishment, end-of-life processing: most OEMs don't have the infrastructure, and building it is expensive.
Dead Batteries Need a Home
Returns, warranty failures, and end-of-life units need a hazmat-compliant destination for diagnosis, repair, or disposal. Offshore assembly partners don't do reverse logistics — and stacking dead batteries in your warehouse is a margin and safety problem.
Most Contract Shops Aren't Built for This
Pack programs cut across modules, BMS controllers, thermal management, harnesses, and enclosures. Most contract shops cover one or two. Fewer handle reverse logistics and refurbishment alongside forward assembly.
Domestic Content Isn't Optional
Federal energy programs, state procurement rules, and enterprise buyers are converging on domestic. Your lifecycle partners need US facilities and qualifications that hold up under audit.
Assembly, Service, and What Comes Back
Lotus does integration work — taking components from multiple sources, assembling them, testing them, and supporting them when they come back. Battery programs are the same workflow pointed at a new market.
Our Canton, Michigan, USA facility has Class 9 hazmat handling, 12 truck wells, ISO 9001:2015 and ISO 14001:2015 certification, with reverse-logistics workflow already running across industries. For system integrators, BMS designers, and ESS OEMs, the lifecycle infrastructure is already in place.
- 4,000 A on-site charging capacity — cycle 1,000+ batteries simultaneously
- Canton, Michigan, USA facility with Class 9 hazmat handling
- 12 truck wells sized for battery pack freight and reverse logistics
- ISO 9001:2015 + ISO 14001:2015 certified
- Warehousing, depot repair, and RMA in the same building
From First Assembly Through Field Returns
We cover the full battery program lifecycle — module and BMS receiving, pack assembly, testing, domestic logistics, and reverse logistics when units come back.
Incoming Inspection
Pre-welded modules, BMS boards, and structural components received and verified to spec. Class 9 hazmat receiving.
BMS Controller Box Build
Controller board assembly, enclosure integration, connector work, and cable harness and busbar builds — for system integrators and BMS designers who need a partner for the physical build.
Pack Assembly & Integration
Module-to-pack assembly for utility/grid-scale, commercial/industrial, and residential ESS programs — pre-welded modules in; BMS, thermal management (including liquid-cooling loops), wiring harnesses, busbars, and enclosure/rack integrated into finished packs under one roof, with torqued, traceable joints. Cell-to-module welding is performed by your cell supplier or a partner specialist; we take it from there.
Testing & Validation
Electrical test, charge/discharge cycling, and thermal validation. Full documentation for traceability and regulatory filings.
Warehousing & Class 9 Logistics
Domestic storage and Class 9 shipping to deployment sites or distribution channels. 12 truck wells sized for battery pack freight.
Reverse Logistics & Refurbishment
Field returns route to our Canton depot — Class 9 intake, diagnostics, module-level repair, second-life refurbishment, or end-of-life processing under ISO 14001.
Metro Detroit Is a Battery Corridor
Michigan’s battery ecosystem — automotive OEM electrification, dedicated pack operations, and a specialist supplier base — runs through this corridor. Canton sits inside it, within trucking range of the suppliers, distributors, and end customers driving domestic ESS programs.
For programs that need reverse logistics, Class 9 handling, and depot repair already running, the location is a structural advantage. Backed by warehousing and ISO 9001 from the same building.
- Canton, Michigan, USA — inside Metro Detroit's battery corridor
- Class 9 hazmat shipping and handling
- 12 truck wells for battery pack freight
- Depot repair and reverse logistics already running across industries
Sq. Ft. Facility
Sq. Ft. Cleanroom
Years Manufacturing
Industry Partners
A battery program is really two jobs: building the packs, and handling them when they come back. 31 years of contract manufacturing cover the build; Class 9 reverse logistics, depot repair, and RMA cover the returns.
Forward assembly. Field returns. Under one roof.
Reverse Logistics Built for Battery Programs
Class 9 hazmat handling, domestic intake, and module-level diagnostics in the same facility that assembles the packs. Returns become infrastructure, not an afterthought.
Domestic and ISO-Certified
Federal energy programs and domestic content mandates converge on the same qualifications. Lotus is US-based and ISO 9001 + 14001 certified, with every step under one roof.
A Lifecycle Partner for Integrators and OEMs
Manufacturing partner for system integrators, BMS designers, and ESS OEMs — harness and busbar assembly, controller box build, module-to-pack and enclosure assembly, and depot repair for field returns. Your design stays yours; the physical build and reverse-logistics workflow are ours.
The Capabilities Behind This Program
Manufacturing & Assembly
Build-to-print and turnkey assembly with cleanroom capability for sensitive component integration.
See the capabilityCleanroom Operations
20,000+ sq. ft. of Class 10,000 and Class 1,000 cleanroom for sensitive battery component assembly and testing.
See the capability3PL Warehousing & Distribution
Same-facility storage with hazmat-compliant handling. Forward logistics to deployment sites and distribution channels.
See the capabilityEnergy Storage System Assembly FAQ
A custom energy storage system manufacturer assembles and integrates ESS to a BMS designer or ESS OEM's spec — pre-welded modules, BMS controllers, thermal management, harnesses, and enclosures integrated into finished packs and systems. Scope covers module-to-pack assembly, BMS integration, electrical and thermal validation, packaging, and (for lifecycle programs) reverse logistics and refurbishment. Lotus operates as a US energy storage system assembler from Canton, Michigan, USA, with Class 9 hazmat handling and 12 truck wells sized for battery freight.
Module-to-pack integration, BMS controller box build, testing and validation (charge/discharge cycling, BMS functionality verification, insulation resistance), Class 9 reverse logistics, RMA, and refurbishment for residential and commercial/industrial ESS programs. Cell-to-module welding is performed by your cell supplier or a partner specialist; we take it from there.
Yes. Lotus is a US contract manufacturer in Canton, Michigan, USA. Assembly, integration, testing, packaging, and reverse logistics all happen domestically — which supports domestic content and federal energy programs.
Our facility includes 20,000+ sq. ft. of ISO Class 6 and Class 7 cleanroom (Class 1,000 and Class 10,000), available for sensitive battery component assembly, BMS integration, and other contamination-controlled work.
Yes. We provide in-process and end-of-line testing — charge/discharge cycling, BMS functionality verification, insulation resistance, thermal validation, and other performance tests to your program spec.
Yes. Field returns route to our Canton facility for Class 9 intake, module-level diagnostics, repair, second-life refurbishment, or end-of-life processing under ISO 14001. Reverse logistics already run in the building across multiple industries; battery programs plug in.
Yes. Our Canton, Michigan, USA operation supports BMS designers and ESS OEMs reshoring pack manufacturing — assembly, testing, warehousing, distribution, and reverse logistics under one roof, with the qualifications federal and state energy programs audit against.
Ready to talk battery program logistics?
Tell us about your program. We respond within one business day.