engineered energy you can trust
William is a modular LiFePO₄ home battery designed and assembled in New Zealand for reliability, safety, and real-world performance. Start with one 16 kWh module and expand as you grow. William turns solar into dependable energy, keeps you powered during outages, and delivers smart, scalable storage you can trust.
Power That Scales
Energy that grows with you.
Each William module stacks seamlessly to expand capacity — no cables, no clutter, just clean design that scales as your needs evolve.
Smarter Inside
Beneath the sleek exterior lies active cell balancing technology that keeps every cell perfectly in sync — extending life, performance, and safety.
Intelligence built right into the core.
Engineered AND ASSEMBLED in New Zealand
Designed by battery experts who understand real-world energy.
Built for reliability, serviceability, and life in New Zealand conditions.
| Feature | Metal zip ties | Solar Rail Cable Clip |
|---|---|---|
| Install time | Slow | Very fast |
| Tools needed | Yes | No |
| Reusable | No | Yes |
| Sharp edges | Yes | No |
| Finish quality | Average | Clean |
| Time per job | 30–60 min | 5–10 min |
