An electronics-grade insulating board for DIY battery pack builds and electrical isolation. XBERSTAR Epoxy Board FR-4 keeps assemblies organised and safer to work on while remaining simple to trim and fit. Is the size and durability right for your cells and layout?
⚡ At a Glance
- • Insulation Performance: High dielectric properties with surface leakage resistance and arc resistance
- • Best for: DIY battery pack builders and electrical hobbyists working with large cells
- • Not ideal for: Load-bearing or mechanical-structure applications where strength matters
A yellow FR-4 epoxy resin board sized at 203mm by 172mm intended for electrical insulation and DIY battery projects. High dielectric strength plus surface leakage and arc resistance suit it to cell spacing and insulation tasks.
Reliable electrical insulation – thanks to FR-4 epoxy resin
FR-4 epoxy resin is a woven fiberglass laminate with a cured epoxy matrix, giving high dielectric strength and resistance to surface leakage and arcing. The material's electrical properties reduce breakdown risk under normal battery voltages.
High dielectric performance helps prevent short circuits and improves safety in battery assemblies. Suitable for isolating cells and separating metal components during pack assembly.
Easy custom fitting – with cut-to-size construction
The board can be trimmed to shape using standard hobby tools, allowing bespoke layouts for different cell sizes and arrangements. Dimension data (203mm x 172mm) gives a predictable starting panel for cutting.
Panels can be tailored to specific packs, making it straightforward to achieve neat, compact assemblies. Right-size panels reduce wasted space and simplify insulation between cell rows.
Practical for common battery projects – thanks to a standard 3240 format
Marked as a 3240 epoxy board and noted in reviews for compatibility with 289/315Ah cells and 48V battery builds, the format aligns with frequent DIY battery configurations. The yellow finish aids identification during assembly.
Works well for large-cell and 48V battery projects commonly attempted by hobbyists and installers. Visible colour and consistent dimensions speed up pack construction and layout checks.
✨ The 4 Key Reasons for XBERSTAR Epoxy Board FR-4
- Cut-to-fit panels – Enables neat, bespoke battery pack layouts with simple trimming
- 3240 format compatibility – Matches common large-cell sizes used in battery builds
- User-validated fit – Favoured for 48V projects and 289/315Ah cell assemblies
- High-visibility yellow finish – Makes placement and inspection quicker during assembly
📋 Technical Details at a Glance
- Category: Electronics insulating board
- Brand: XBERSTAR
- Material: FR-4 epoxy resin (fibreglass laminate)
- Model / Format: 3240
- Quantity: 10 pieces
❓ Frequently Asked Questions
Q: Is this board suitable for insulating battery packs?
A: Yes. Product descriptions and user feedback identify the board as intended for DIY battery packs, with dielectric and leakage resistance suited to that role.
Q: Can the sheets be cut to size for custom assemblies?
A: Yes. The item is described as cuttable, so sheets can be trimmed to fit specific cell arrangements and pack layouts.
Q: What are the sheet dimensions and how many are included?
A: Each sheet measures 203mm by 172mm and the listing indicates a multi-piece set, commonly used in battery assembly projects.
🏆 Our Verdict
Well suited to hobbyists and professionals assembling 48V and large-cell battery packs who need reliable electrical insulation. The combination of FR-4 epoxy resin and a cuttable, standard 3240 format makes it easy to fit panels into custom layouts. Affordable and regarded as reliable by users, it delivers lasting utility in battery and insulation projects.
