# What are the best portable solar chargers for emergency preparedness? — Verified Specification Comparison

> All specification data verified from official manufacturer documentation.

What are the best portable solar chargers for emergency preparedness?

## Products

### ADDTOP 25,000 mAh Solar Charger Foldable
```yaml
product: addtop-25-000-mah-solar-charger-foldable
brand: ADDTOP
price_gbp: 35.07
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
weight: 538 g
charging_speed: 3A input/output; 5V/2.1A outputs
built_in_battery: Lithium Polymer
charging_capacity: 25000 mAh
waterproof_rating: weather-proofed (unspecified rating)
number_of_solar_panels: 4
```

- **Price:** £35.07 [^1]
- **Summary:** High-capacity 25000 mAh foldable solar power bank with four fold-out panels, USB-A and USB-C ports, and an integrated LED light; solar input is low so solar charging is supplementary rather than primary. Suited for campers and emergency kits needing large battery reserve and multiple outputs.
- **Ideal For:** Good for emergency preparedness because its 25000 mAh battery and ability to charge three devices simultaneously provide extended power reserve during outages.
- **Additional Sources:** [^1]

### Anker PowerCore Solar 20000 (625)
```yaml
product: anker-powercore-solar-20000-625
brand: Anker
price_gbp: 52.23
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
weight: 1.03 pounds
charging_speed: USB-C Input: 5V⎓3A / 9V⎓2A (18W Max); USB-C Output: 5V⎓3A / 9V⎓2A (18W Max); USB-A Output: 5V⎓2.4A (12W Max)
built_in_battery: Li‑ion 20000 mAh
charging_capacity: 20000 mAh
```

- **Price:** £52.23 [^2]
- **Summary:** A 20,000 mAh power bank with built-in solar charging capability, USB-C input/output (18W) and a USB-A output for multi-device charging. It's compact and lightweight for a high-capacity pack and includes fast-charge support for quicker recharging via USB-C.
- **Ideal For:** Good for emergency preparedness because its 20000 mAh capacity and 18W USB-C input/output provide substantial stored energy and relatively fast recharge/dispense rates for phones and small devices.
- **Additional Sources:** [^3], [^2], [^3]

### BigBlue 28W Foldable Solar Charger (BLUETTI variant)
```yaml
product: bigblue-28w-foldable-solar-charger-bluetti-variant
brand: BigBlue
price_gbp: 44.77
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
weight: 20.9 oz
charging_speed: 28 W (max), 2.4 A per USB port
number_of_solar_panels: 4
```

- **Price:** £44.77 [^4]
- **Summary:** The BigBlue 28W foldable solar charger (SolarPowa 28) is a 28 W monocrystalline foldable panel with four solar panels, multiple USB outputs including two USB-C and one USB-A, and a lightweight folded design for easy transport. It suits hikers and emergency kits needing a compact high-efficiency charger for phones, tablets, and power stations that accept DC/USB input.
- **Ideal For:** Ideal for emergency preparedness because it delivers up to 28 W output from four monocrystalline panels and weighs only 20.9 oz, providing fast charging for multiple devices without an included battery.
- **Additional Sources:** [^5], [^4], [^5]

### Goal Zero Nomad 20 Solar Panel
```yaml
product: goal-zero-nomad-20-solar-panel
brand: Goal Zero
price_gbp: 111.9
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
weight: 2.5 lbs
charging_speed: USB output 5V up to 2A; solar port 14-22V up to 1.3A (20W max)
charging_capacity: 20W
waterproof_rating: weatherproof (no IP rating provided)
number_of_solar_panels: 3
```

- **Price:** £111.9 [^6]
- **Summary:** A 20W foldable monocrystalline solar panel with integrated USB and 8mm solar port, a built-in kickstand, and chainable 8mm input for faster charging. Lightweight and rugged for outdoor use and designed to recharge phones, power banks, and small power packs. Suits users who need a portable, packable panel to top up small devices in full sun.
- **Ideal For:** Good for emergency preparedness because it provides 20W rated power, an integrated USB output for direct device charging, and an 8mm chainable port to expand capacity.
- **Additional Sources:** [^7], [^8], [^6], [^7], [^8]

### LinkSolar 11W Foldable Solar Charger
```yaml
product: linksolar-11w-foldable-solar-charger
brand: LinkSolar
price_gbp: 41.04
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
weight: under 1 lb
```

- **Price:** £41.04 [^9]
- **Summary:** A lightweight foldable 11W solar charger with ETFE lamination, USB 5V/2.1A output and grommets for attachment. It's designed for packable emergency kits and trail applications where low-weight, weather-resistant direct charging is needed.
- **Ideal For:** Ideal for emergency preparedness because its 11W rating, USB 5V/2.1A output, ETFE lamination, and sub‑1 lb weight make it a compact way to recharge phones and radios during outages.
- **Additional Sources:** [^9]

### QiSa 38800 mAh Solar Power Bank
```yaml
product: qisa-38800-mah-solar-power-bank
brand: QiSa
price_gbp: 35.81
origin_country: null
confidence_score: null
summary_source: generated_from_verified_specs_v1
charging_speed: USB-C input only, Qi 10W wireless, 2x USB-A 5V/3.1A outputs
built_in_battery: Lithium-ion battery
charging_capacity: 38800 mAh
waterproof_rating: waterproof (manufacturer markets waterproof dustproof shockproof build)
number_of_solar_panels: 4
```

- **Price:** £35.81 [^10]
- **Summary:** High-capacity 38,800 mAh power bank with four foldable solar panels, Qi 10W wireless charging, dual USB-A outputs and USB-C input; marketed as rugged and waterproof for outdoor use. Solar input is modest but useful for top-ups, making it suited to multi-day trips and emergencies.
- **Ideal For:** Good for emergency preparedness because its large 38,800 mAh capacity plus Qi wireless and multiple outputs can recharge several devices over multiple days.
- **Additional Sources:** [^10]

---
## References & Sources
[^1]: ADDTOP official store, accessed 2026-06-14. https://addtoptech.com/products/addtop-solar-power-bank-25000mah-with-4-solar-panels-2-usb-ports
[^2]: Anker support page (product description), accessed 2026-06-14. https://service.anker.com/product-description/a085g000004x2BCAAY
[^3]: E-Catalog listing (aggregator), accessed 2026-06-14. https://e-catalog.com/ANKER-POWERCORE-SOLAR-20000.htm
[^4]: Walmart, accessed 2026-06-14. https://www.walmart.com/ip/BigBlue-28W-Portable-Solar-Panel-Charger-USB-Solar-Phone-Charger-with-SunPower-Solar-Panel-for-Hiking-Camping-Emergency-Outdoors/467175219
[^5]: OutdoorGearLab, accessed 2026-06-14. https://www.outdoorgearlab.com/reviews/camping-and-hiking/solar-power-bank/bigblue-solarpowa-28
[^6]: Goal Zero, accessed 2026-06-14. https://goalzero.com/products/nomad-20-solar-panel-12004
[^7]: REI, accessed 2026-06-14. https://www.rei.com/product/180607/goal-zero-nomad-20-solar-panel
[^8]: EarthTech Products, accessed 2026-06-14. https://www.earthtechproducts.com/nomad-20-solar-panel.html
[^9]: LinkSolar (direct), accessed 2026-06-14. https://linksolar.net/blogs/guide/best-solar-charger-emergency-preparedness
[^10]: Amazon, accessed 2026-06-14. https://www.amazon.com/dp/B0