ESS Insulation Kit
Energy storage insulation for battery racks and containers — busbar sleeving, HV harness protection, sealing and fire sleeving, sized to your pack drawing and made in our own factories.
What we supply
We build ESS insulation from our own production lines. Heat-shrink tubing, busbar casing and cable accessories come out of our Suzhou factory; fiberglass, silicone and fluoropolymer sleeving comes out of our Anji factory. WELLELE is the export brand for both. Every order ships with its matching test report — dielectric, flammability and dimensions, measured on your batch. If your rack drawing needs something we do not list, ask: if we cannot supply it, we will tell you straight instead of bidding a promise.
Key reference data
Voltage class
Shrink ratios
PTFE sleeving
Flame retardancy
Fire sleeving
Documentation
Kit items are confirmed against the pack drawing or BOM: part, size, material, quantity, cut length and marking. You approve the item list before production.
What the kit covers
Busbar & connector
Heavy-wall 8.7/15kV and 26–35kV busbar tubing, dual-wall sealing at joints.
HV harness
Silicone-coated fiberglass and 260 °C PTFE grades for high-voltage runs.
Sealing & grounding
Watertight sealing for connections; grounding identification per rack standard.
Fire protection
Protection for battery-level cable runs where fire rating is specified.
Each kit is itemized against the pack BOM or drawing. You approve the item list before production — no surprises in the crate.
Recommended products
8.7/15kV Busbar Heat Shrink Tubing
4:1 Dual-Wall Adhesive Heat Shrink Tubing
Silicone-Coated Fiberglass Sleeving
PTFE Heat Shrink Tubing (260 °C)
Fiberglass Fire Sleeve with Fastening
Green-Yellow Grounding Heat Shrink Tubing
Select by application
ESS busbar insulation
Battery pack HV harness
Battery rack insulation
Connection sealing
Fire-rated cable runs
Grounding identification
Send the pack or container drawing, voltage class and operating temperature. We return a kit item list with sizes and materials — that item list is the quotation basis.
Frequently asked questions
What information do you need for an ESS insulation kit quote?
The pack or container drawing (or BOM), voltage class, operating temperature and annual quantity. We return an itemized kit list with sizes and materials.
Do you supply test reports with the order?
Yes. Every shipment carries its matching test report — dielectric strength, flammability (UL94 / VW-1) and dimensions, measured on your batch. Datasheets are available before ordering.
Are the products UL certified?
A UL-certified range is available on specified products. Confirm the exact model coverage with our engineers before ordering.
Where are the products made?
Heat-shrink tubing and cable accessories in our Suzhou factory; fiberglass, silicone and fluoropolymer sleeving in our Anji factory. WELLELE is the export brand for both.
Do you supply fire-rated sleeving for battery runs?
Yes. Fiberglass fire sleeve with fastening is available for battery-level cable runs where fire rating is specified.
Why buy the kit instead of sourcing parts separately?
One drawing, one quotation, one PO and one inspection report. Sourcing a container's insulation from five suppliers means five lead times, five quality standards and five freight charges.
Need a custom size or spec?
Send the pack drawing or BOM, voltage and temperature — we return an itemized kit list with sizes, materials, lead time and the test report list.
Read our buying guides & specification articles →
Related solutions: 800V Busbar Insulation · Busbar & Switchgear Insulation · Wire Harness & Cable Protection