| Type | Supercapacitor — low-voltage electrostatic storage (48 V) |
| Product range | 3 models: Alpine DOUBLE / TRIPLE / QUAD — 3.3 / 4.95 / 6.6 kWh |
| Lifespan | 45-year design life — 20-year warranty |
| Cycles | Virtually unlimited (≈ 5× lithium) |
| Safety | No thermal runaway — dual protection (SSR + DC thermal circuit breaker) |
| Round-trip efficiency (RTE) | > 97% (module) — 99.1% (cell) |
| Charge / discharge | Ultra-fast, up to 2C, with no heat buildup |
| Temperature | −40°F to +149°F (−40°C to +65°C) |
| Enclosure rating | IP30 — Wi-Fi + app monitoring |
| Manufacturer | WEST (Wright Energy Storage Technologies) |
The WRIGHT supercapacitor has finally arrived in the residential solar storage market. Manufacturer WEST (Wright Energy Storage Technologies) is taking solar energy storage to the next level with its Alpine series: a 48 V low-voltage module available in three capacities — 3.3, 4.95, and 6.6 kWh.
“In our view, the WRIGHT Alpine supercapacitor is the longest-lasting and safest alternative to lithium. Electrostatic storage with no chemical reaction means no wear and no thermal runaway, plus a 45-year design life and a 20-year warranty. Ultra-fast charging up to 2C and an operating range of -40°F to +149°F: for projects where longevity and safety come first, we consider it an exceptional technology.”
— Julien, Perma Batteries
This technology is based on optimized supercapacitors. It stores energy electrostatically, with no chemical reaction. As a result, it suffers no significant degradation over its cycles, and the WRIGHT supercapacitor retains its capacity for decades.
What’s more, it offers a 45-year design life backed by a 20-year warranty. That makes it the longest-lasting and safest alternative to lithium-ion batteries.
💡 What this means for you
Unlike a battery, a supercapacitor doesn’t store energy through a chemical reaction. Instead, it stores it electrostatically, in an electric double layer at the surface of the electrodes. No material is transformed during charging or discharging.
This absence of chemical reaction explains its advantages. First, degradation is negligible, even after hundreds of thousands of cycles. Second, charging and discharging are nearly instantaneous. Finally, thermal runaway is simply not possible.
WEST takes this principle further with its Optimized Supercapacitor technology. The EZ-Power™ system adds short-circuit detection, multi-module balancing control, and controlled soft charging. In addition, the patented CLC manages power release safely.
The trade-off is lower energy density than a lithium battery. For stationary solar applications, however, this limitation is secondary. The WRIGHT supercapacitor prioritizes longevity and safety over compactness.
❓ How does a supercapacitor work?
Safety is a cornerstone of the WRIGHT supercapacitor. First, the technology carries no risk of thermal runaway. Second, every module is protected by dual safeguards: an electronic solid-state relay (SSR) and a DC thermal circuit breaker. The system is therefore just as safe in a home as in a public building.
Its thermal resilience is also exceptional: it operates from -40°F to +149°F (-40°C to +65°C) with no critical derating. Its efficiency exceeds 97% at the module level and reaches 99.1% at the cell level, keeping losses to a minimum.
🛡️ Uncompromising safety
Supercapacitor technology offers several major advantages. Here are the key ones:
The WRIGHT supercapacitor is designed for applications where longevity and safety come first. Its thermal resilience and fast charging also cover a wide range of use cases. That’s why it’s a great fit for the following situations:
The right Alpine model depends on your needs. The Alpine DOUBLE offers 3.3 kWh and stacks up to 6 modules. The Alpine TRIPLE delivers 4.95 kWh and stacks up to 5 modules. Finally, the Alpine QUAD reaches 6.6 kWh and stacks up to 3 modules.
One point deserves your attention, however: energy density is lower than that of a lithium battery. The supercapacitor prioritizes longevity and safety, making it ideal for applications where lifespan matters more than compactness.
Finally, modules can be stacked and paralleled without limit, so your storage grows with your needs. Request a custom quote to size your system.
| Alpine DOUBLE | 3.3 kWh (67 Ah) — 100 A continuous (125 A peak) — 1.5C — stackable up to 6 — 157.9 lb (71.6 kg) |
| Alpine TRIPLE | 4.95 kWh (100 Ah) — 200 A continuous (250 A peak) — 2C — stackable up to 5 — 225.8 lb (102.4 kg) |
| Alpine QUAD | 6.6 kWh (134 Ah) — 250 A continuous (250 A peak) — 1.5C — stackable up to 3 — 299.4 lb (135.8 kg) |
| Voltage (all models) | Charge 53.6 V — recommended discharge 46.0 V |
The WRIGHT Alpine supercapacitor has a 45-year design life. Degradation remains negligible throughout its service life, and its cycle count is virtually unlimited — five times that of a lithium battery.
It’s backed by a 20-year manufacturer’s warranty. Monitoring is handled over Wi-Fi through an Android/iOS app, powered by EZ-Power™ technology, so you can track your system’s status in real time.
Finally, it’s a clean technology: electrostatic storage with no critical raw materials and no chemical reaction. Request a custom quote to size your system.
| Criterion | WRIGHT Supercapacitor | Lithium Battery |
|---|---|---|
| Design life | Up to 45 years, negligible degradation | 10 to 15 years, gradual capacity loss |
| Cycles | Virtually unlimited (5× lithium) | 6,000 to 8,000 cycles |
| Safety | No thermal runaway, dual protection | Flammable under extreme conditions |
| Temperature range | −40°F to +149°F (−40°C to +65°C) | 32°F to 113°F (0°C to +45°C) in normal use |
| Round-trip efficiency (RTE) | > 97% (module), 99.1% (cell) | 90 to 95% depending on chemistry |
| Charge / discharge | Ultra-fast, up to 2C, with no heat buildup | Limited to preserve lifespan |
| Specification | Alpine DOUBLE | Alpine TRIPLE | Alpine QUAD |
|---|---|---|---|
| Capacity (kWh / Ah) | 3.3 / 67 | 4.95 / 100 | 6.6 / 134 |
| Nominal charge voltage | 53.6 V | ||
| Recommended discharge voltage | 46.0 V | ||
| Max. continuous current | 100 A | 200 A | 250 A |
| Max. peak current | 125 A | 250 A | 250 A |
| Max. charge/discharge rate | 1.5C | 2C | 1.5C |
| Module weight | 157.9 lb (71.6 kg) | 225.8 lb (102.4 kg) | 299.4 lb (135.8 kg) |
| Dimensions (L × W × H) | 13.8 × 23.1 × 12.6 in (349.5 × 586 × 320 mm) | 13.8 × 23.1 × 18.5 in (349.5 × 586 × 470 mm) | 13.8 × 23.1 × 24.4 in (349.5 × 586 × 621 mm) |
| Stackable | Up to 6 modules | Up to 5 modules | Up to 3 modules |
| Round-trip efficiency (module RTE) | > 97% (99.1% at the cell level) | ||
| Operating temperature | −40°F to +149°F (−40°C to +65°C) | ||
| Ingress protection rating | IP30 | ||
| Monitoring | Wi-Fi, Android / iOS app | ||
| Current protection | Electronic SSR + DC thermal circuit breaker (dual protection) | ||
| Lifespan / Warranty | 45-year design life — 20-year warranty | ||
