What’s actually slowing this PC down?
Pick the symptom - the matching free tool is one click away.
iTechGuides is reader-supported. When you buy through links on our site, we may earn an affiliate commission. As an Amazon Associate I earn from qualifying purchases. Learn more
Norbornadiene can absorb light and rearrange into a higher-energy, strained molecule called quadricyclane, storing energy that can later be released as heat. The chemistry is real, but the evidence does not show that it stores solar energy for decades: a 2018 study measured lifetimes up to 48.5 days in specific oligomer molecules, while a 2024 review reports selected derivatives designed for storage times up to 18 years.
How does light turn norbornadiene into stored energy?
Norbornadiene (NBD) absorbs light and undergoes a photoinduced [2+2] cycloaddition, forming quadricyclane (QC). QC is a strained, higher-energy isomer of NBD. The energy is stored as chemical potential in that molecular arrangement rather than as electricity in a battery.
To recover the energy, QC can be driven back to NBD through a reverse reaction called cycloreversion. Heat or a catalyst can trigger that change, releasing energy as heat. Electrochemical triggering has also been studied, but that does not make NBD/QC an established electricity-storage technology. The field is generally called molecular solar thermal energy storage (MOST); some literature uses “solar thermal fuel.”
Quick wins for a faster PC:
Repair Windows errors before they cause bigger problemsFix Now →Fix the driver behind crashes, sound loss and screen glitchesFind Drivers →An Accounts of Chemical Research review (2020) surveys the engineering of NBD/QC photoswitches for MOST applications.
#1 Best Overall
- High-Capacity Home Energy Storage: This system pairs a 10kW hybrid inverter with a UL 1973-certified 48V 314Ah LiFePO4 battery, delivering 16.1kWh of usable energy for home backup, off-grid cabins, solar energy storage, and emergency power needs. Backed by a 10-year warranty, the PowerMega 48V 314Ah provides added confidence for reliable, long-term use
- Smart Battery Communication & WiFi Monitoring: The 48V 314Ah battery supports RS485, CAN, and RS232 communication for broad inverter compatibility. A built-in LCD screen shows real-time battery data, while built-in WiFi and Bluetooth connectivity enable convenient mobile app monitoring anytime
- Robust BMS with Built-In Breaker: The 48V battery is equipped with an Active Balancing Smart BMS, built-in circuit breaker, aerosol fire suppression module, and buzzer alarm for multi-layer safety protection. It safeguards against over-charge, over-discharge, over-current, short circuit, and extreme temperatures, ensuring secure and stable long-term operation
- Long Cycle Life & High Efficiency: The 48V 314Ahlithium battery delivers 9,000+ cycles at 80% DoD, providing over 10 years of reliable service. The 10kW hybrid inverter features up to 99.9% MPPT efficiency, maximizing solar energy harvest from high-wattage arrays
- Easy Setup & Flexible Output: The 10000w inverter supports split-phase 240V and single-phase 120V output for flexible installation. The battery includes reinforced casters for easier mobility. Package includes 1 × 10kW Hybrid Inverter + 1 × 48V 314Ah LiFePO4 Battery (battery shipped via truck freight). Two inverter versions are available and will be shipped randomly based on inventory. The two versions differ only in exterior appearance, with no differences in performance, specifications, functions, or compatibility
Does it really store solar energy for decades?
Not on the evidence cited here. A molecule’s storage lifetime describes how long it can remain in its energy-storing state before reverting; it is not by itself proof of a practical storage device or a full-scale demonstration.
- 48.5 days: the maximum measured storage lifetime reported in a 2018 study of particular NBD/QC photoswitches incorporated into dimeric and trimeric structures.
- 1 hour to 18 years: a 2024 review’s reported adaptable storage-time range for selected substituted NBD derivatives. This is a review-level summary of selected systems, not evidence of multi-decade storage.
The 18-year upper end is substantial, but it is still short of decades. It should not be presented as a demonstrated long-duration storage system without specifying the molecule and the evidence behind the figure. See the 2018 oligomer study and the 2024 review.
Rank #2
- Powerful yet Compact: Boasting a 1,500W AC output and a 3,000W surge peak, the Solar Generator 1000 V2 can power multiple appliances, including AC units, fridges, and electric pots. With a 1,070Wh capacity and a lightweight build of only 23.8 lbs, along with a foldable handle, it makes an excellent companion for outdoor camping, road trips, and emergencies.
- One Hour Fast Charging: Charge your Explorer 1000 v2 Portable Power Station from 0% to 100% battery level in just one hour with emergency charging activated via the Jackery App. It defaults to 1.7 hours for a full charge to optimize battery health. Alternatively, reach a full charge in 3 hours with a 600W Alternator Charger, or charge to 80% in 6 hours using a 200W solar panel.
- 10 Year Lifespan: The Explorer 1000 v2 portable power station is equipped with a durable LFP battery, maintaining over 70% of its original capacity even after 4,000 charge cycles, offering longevity exceeding 10 years.
- Tailored for Versatility: Featuring two USB-C ports, one USB-A port, one DC car port, and three pure sine wave AC ports, along with LED lights, the Solar Generator 1000 V2 is capable of charging multiple devices simultaneously, meeting power needs in various scenarios. PD 100W fast USB-C charging ensures a rapid charging speed, even without power adapters.
- Smart App Control: Effortlessly switch between different charging modes with Jackery’s App—including one hour emergency charging from 0 to 100%, 30 dB quiet overnight charging mode, and energy efficiency mode. Maximize the freedom to adjust the power station to meet your needs.
What performance has been measured?
Results depend on the molecular structure and on whether a figure was measured or calculated. The following values belong to particular studies, not to all NBD/QC compounds.
Do these 3 things before closing this tab:
1Clear out junk files and repair common Windows errors2Fix the driver behind crashes, sound loss and screen glitches3Repair Windows errors before they cause bigger problems| Study and system | Reported result | How to interpret it |
|---|---|---|
| Mansø et al., 2018; NBD/QC photoswitches in dimeric and trimeric structures | Up to 559 kJ kg−1 (155 Wh kg−1) measured energy density; up to 48.5 days measured storage lifetime; up to 94% photoconversion quantum yield per NBD subunit | Measured maxima for the oligomer systems studied, not general specifications for the whole chemistry. |
| Mansø et al., 2018; same oligomer study | Up to 927 kJ kg−1 (257 Wh kg−1) calculated energy density | A calculated value, distinct from the study’s measured maximum. |
| Such et al., 2016; studied low-molecular-weight substituted NBD/QC derivatives | 396–629 kJ kg−1 reported energy-storage densities | Values for the derivatives and measurement context in that study, not a universal range. |
The 2018 authors describe molecular photoswitches as storing solar thermal energy through photoisomerization into high-energy, metastable isomers. Their reported maxima show why molecular design matters; they are not guarantees of the energy a finished system would deliver. The papers are available from Nature Communications and the 2016 study.
Rank #3
- [Complete&Friendly]: Beginner-friendly Solar Kit, including all accessories required for connection. 800Wh daily output depends on the 4 hours sunlight availability. The reasonable matches ensures the sufficient use of solar power and doesn't cause waste. Suitable for RV, camper, trailer, boats, cabins, etc. wherever you need power.
- [600W 2-in-1 Inverter & 30A Charger]:Integrates 600W pure sine wave inverter, smart LiFePO₄ charger (30A), and 20ms UPS auto-switch; 5A-40A adjustable current with App/button control; features 0V activation, 3-stage charging, multi-protection, Anderson plug-and-play, ideal for RVs and DIY systems.
- [12V 50AH LiFePO4]: ECO-WORTHY 12V 50Ah LiFePO4 battery includes an XT60 port and adapter to connect to cigarette lighters or car devices. It also works with a car power inverter, adding Type-C and USB ports,perfect for charging devices during camping or road trips. Note: XT60 interface with a maximum input and output current of 30A，please use within safe limits.
- [N-Type Solar Panel]: ECO-WORTHY 100W solar panel features advanced N-Type monocrystalline cells with 25% high efficiency, outperforming traditional PERC panels. Its dual-sided design captures reflected light for up to 15% extra output, while the N-Type cells perform excellently in low-light conditions (dawn, dusk, or cloudy weather), ensuring longer-lasting and reliable power for off-grid systems.
- [Long Life]: ECO-WORTHY lithium iron phosphate battery (LiFePO4) can be recharged 4000~15000 times in a deep cycle to achieve a longer cycle life. More than 10 times higher than lead-acid batteries (generally only 300-400 cycles can be charged).
What makes one NBD/QC design better than another?
No single metric determines whether a photoswitch is useful. Researchers need to balance how much sunlight it absorbs, how efficiently light converts it, how long the stored state persists, and how effectively and reversibly it releases heat.
- Energy density: how much energy a given mass of material can store.
- Solar-spectrum absorption: how well the molecule absorbs the wavelengths available in sunlight.
- Photoconversion quantum yield: how efficiently absorbed photons produce the stored QC state.
- Metastable-state lifetime: how long the molecule retains that state before returning toward NBD.
- Release and cycling: the trigger or catalyst required, the heat-release performance, and whether the material can be cycled reliably.
Adding donor–acceptor substituents can shift absorption toward longer wavelengths and improve overlap with sunlight. But added molecular mass can lower gravimetric energy density, and structural changes that improve solar absorption may also shorten storage time. Likewise, the 2018 dimer/trimer work found promising energy density and lifetime in its studied oligomers, but those results do not mean every larger molecule will perform better.
Rank #4
- COMPLETE OFF GRID SOLAR SYSTEM KIT – 2340W of Clean Power ECO-WORTHY 5KW off grid solar system complete kit includes 12pcs 195W mono solar panels (2340W total), 1pc 48V 5KW off-grid inverter, and 1pc 48V 100AH Cubix lithium battery.Equipped with necessary cables and brackets.
- 12PCS 195W MONO N-Type SOLAR PANELS – High Efficiency & Durable Each 195W monocrystalline solar panel delivers reliable output and is built for roof, ground, or shed mounting. The 2340W solar panel roof kit is ideal for off grid cabins, RVs, homes, and backup power systems.
- 5KW 48V OFF-GRID INVERTER – Stable Power for Off-Grid The 48V 5KW off-grid inverter converts DC power from your solar panels and battery into usable AC electricity. Perfect for powering lights, appliances, TVs, fridges, and other essentials during outages or off-grid living.
- 48V 100AH Cubix LiFePO4 LITHIUM BATTERY – Long-Lasting Storage The 51.2V 100AH server rack LiFePO4 lithium battery offers deep-cycle storage, high safety, and a long lifespan. It stores solar energy for night use and works seamlessly with the included 5KW inverter for whole house storage.
- ECO-WORTHY SOLAR PANEL KIT – Easy Setup & Reliable Support This eco worthy solar panel kit is designed for DIY installation with clear wiring and mounting. Whether you search for solar system, solar kits off grid with battery and inverter, or ecoworthy 5k kit, this complete set is a solid off-grid energy solution.
What limits practical use?
A long-lived molecule is only one part of a storage system. A useful system also needs effective solar absorption, high conversion yield, stability over repeated cycles, efficient heat release, suitable catalysts or triggers, and equipment that can contain and handle the material.
The 2024 review describes laboratory-scale demonstrations and identifies photoconversion yield, stability, and overall efficiency as ongoing challenges. A 2026 paper on kinetics, modeling, and continuous-flow implementation shows that process engineering remains an active research area; it is evidence of development work, not of commercial readiness. The article is available at Chemical Engineering Journal.
Best Value
- UL 1973 Certified for Safety & Reliability: The Powermega 48V 314Ah is UL 1973 certified and backed by a 10-year warranty, providing added confidence for long-term energy storage and demanding off-grid applications
- 16.07kWh High Capacity: ECO-WORTHY 48V 314Ah LiFePO4 battery delivers 16.07kWh of powerful energy in a compact footprint. Supports up to 15 units in parallel expansion, reaching 241kWh — ideal for outages, off-grid systems, and whole-home backup
- Active Balancing BMS: This 51.2V Lithium battery is equipped with a 200A smart Battery Management System with active cell balancing, keeping every battery cell working evenly. It improves charging efficiency, reduces long-term capacity loss, and extends overall battery service life for reliable daily performance
- Dual Safety Protection: This 48V battery is built with genuine Grade A cells . Combined with an internal 200A BMS and an external two-pole circuit breaker, the battery system delivers multi-layer protection against over-current, short circuits, and abnormal operating conditions for enhanced safety and stability
- Fire Protection: Built-in aerosol fire suppression modules help reduce thermal runaway risks and add an extra layer of safety for indoor and home energy storage applications
Are there films or other device concepts?
Researchers have investigated NBD/QC photoswitches embedded in polymer matrices as possible energy-storing films or coatings. A 2019 study reported a lifetime up to 10 months for the polymer-film photoswitch system it studied. That is a result for that research system, not proof of a commercially available coating or of a multi-decade device. See Petersen et al. (2019).
Liquid photoswitches and polymer-embedded films raise different questions: liquid systems and films differ in handling and integration, while molecular energy density and lifetime depend on the specific photoswitch. Neither a promising molecule nor a prototype film alone establishes a complete, practical storage product.
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
