Everything you need to know about our products, shipping, and how to get the most out of your kit in the field. Can't find what you're looking for?

Contact us at info@whitebrotherselectricsupply.com — we respond within 24 hours on business days.

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Technically yes — but we strongly recommend against it, and here's why. Solar output fluctuates constantly as clouds pass, the panel shifts, or shadows move. Your phone's charging chip detects these fluctuations as an unstable connection and will repeatedly disconnect and reconnect. On some phones, it will stop recognizing the charge entirely until you unplug and replug manually. The correct method is: solar panel → power bank → your device. The power bank acts as a buffer — it absorbs the variable solar input and delivers clean, stable power to your device on demand. This is how professional field photographers, guides, and backcountry hunters use solar, and it's the approach we've built this kit around. As a bonus, the power bank charges your device overnight from stored energy, even when the sun is down.

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Q: How many times can it charge my phone on a full power bank? 

The INIU 20,000mAh 45W power bank provides approximately 4–5 full smartphone charges under real-world conditions, accounting for standard conversion efficiency loss. A few honest caveats: if you're running multiple devices simultaneously — say, a phone, a Garmin inReach, and a headlamp — you'll go through the bank faster. Cold temperatures below 32°F will reduce capacity by around 8%. And if your phone has a large battery (like a modern iPhone Pro Max or Samsung Ultra), you'll be on the lower end of that range. For a typical 7-day backcountry trip running one phone and one GPS device, a full power bank combined with daily solar topping gives you effectively unlimited power for the duration.

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Yes — but output drops significantly, and we'd rather be honest about it than oversell. In partly cloudy conditions you can expect roughly 1–2 phone charges worth of power generated per day. On a fully overcast day, it's closer to half a phone charge. In dense forest shade or heavy smoke, output may be near zero. This is why we always recommend starting every trip with a fully charged power bank. Think of the solar panel as your daily top-up and insurance policy — not your primary power source. On sunny mountain trips and high desert hunts where you get 8–10 hours of direct sun, the panel genuinely keeps up with daily usage. On cloudy coastal trips, the pre-charged bank does most of the work. The kit is designed for real backcountry conditions, not marketing brochures.

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Yes — the power bank in this kit is carry-on compliant on virtually all major airlines. The INIU 20,000mAh 45W has a capacity of approximately 74Wh, which is well under the FAA's 100Wh carry-on limit. Most international airlines follow the same standard. Important: the power bank must go in your carry-on bag, never in checked luggage. This applies to all lithium-ion batteries regardless of size. The solar panel itself has no battery and can go in either carry-on or checked baggage. Always confirm with your specific airline before travel, as policies can vary.

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In ideal full-sun conditions, the 28W panel generates enough power to recharge the 20,000mAh bank from empty in approximately 2–3 days of continuous solar exposure. In practice, most users don't need to fully recharge from solar. The typical pattern on a multi-day trip is: start with a full bank charged at home, use the solar panel to top off daily, and arrive home with the bank at 40–60% — no recharge anxiety needed.

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Any device that charges via USB-C or USB-A — which covers essentially all modern backcountry electronics. Confirmed compatible devices include: iPhone (all models), Android smartphones, Garmin inReach Mini and Mini 2, SPOT Gen4 and X, Garmin GPS handhelds (eTrex, GPSMAP series), Garmin Fenix and Epix watches, GoPro Hero series, DJI Osmo Pocket, USB rechargeable headlamps, Bluetooth earbuds and AirPods, Kindle and e-readers, and most satellite communicators. Not compatible with: laptops, large portable power stations (Jackery, EcoFlow, Goal Zero Yeti), or any device that requires a dedicated wall charger.

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Q: What's the total kit weight? 

The complete kit — panel, power bank, all cables, and carabiners — weighs 2.16 lbs (980g). Breakdown: - BigBlue SolarPowa 28W panel: 1.25 lbs (567g) - INIU 20,000mAh 45W power bank: 0.76 lbs (346g) - Cables and carabiners: approximately 0.15 lbs (67g) For context, 2.16 lbs is roughly the weight of a full Nalgene water bottle — but unlike the Nalgene, it keeps your devices charged for a week.

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Both components are weather-resistant but not fully submersible — here's the honest breakdown. The BigBlue 28W panel carries an IP44 rating, which means it's protected against rain, light splashes, and wet fog. We've tested it in steady rain without issue. Do not submerge it or leave it in standing water. The INIU 20,000mAh power bank is designed for outdoor use and handles rain and pack splashes confidently. For river crossings or true downpour conditions, we recommend storing the power bank in a waterproof stuff sack or dry bag as an extra precaution. The panel can stay deployed in rain — that's what it's designed for.

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Fair question — and if you've tried a cheap solar panel before, you already know the answer. Here's what you're actually getting for $249: The BigBlue SolarPowa 28W uses SunPower N-type cells — the same technology used in high-end residential solar — with a verified 25.4% efficiency rating. The $35 Amazon panels typically run 15–18% efficiency with polycrystalline cells that degrade quickly and perform poorly in partial shade. The INIU 20,000mAh 45W is a purpose-built power bank with 45W fast charging, a built-in USB-C cable, and a 3-year warranty — the longest in its category. A comparable quality bank alone retails for $60–80. The kit also includes the correct cables for your setup, a setup guide that explains how to actually use solar effectively in the field, and a brand that stands behind the product. You're not paying $249 for a solar panel. You're paying $249 for a solved problem — one that works on day 7 of a backcountry hunt when your navigation, emergency communication, and camera all need power.

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Q: What if something arrives damaged or stops working? 

We stand behind this kit. Here's our commitment: If anything arrives damaged: contact us within 7 days with a photo and we'll ship a replacement at no cost to you — no return needed. If a component stops working within 30 days: full replacement or refund, your choice. Beyond 30 days: the INIU power bank carries a 3-year manufacturer warranty — the best in its category. We'll help you navigate the warranty claim process if you run into any issues. Email us at info@whitebrotherselectricsupply.com — we respond within 24 hours on business days. We're a small team and we actually read every email.

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Orders are processed within 1–2 business days. Once shipped, delivery typically takes 5–8 business days for orders within the contiguous United States. Your kit ships in two separate packages — one for the solar panel and one for the power bank — because they come from two specialized suppliers. You'll receive a tracking number for each package. Both will arrive within 1–2 days of each other.

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Yes — free standard shipping on all US orders, no minimum required.

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Yes — we accept returns within 30 days of delivery, no questions asked, provided the item is unused and in its original condition with all components included. We provide a prepaid return label. See our full Return Policy for details.

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You'll receive an automated email with your tracking number as soon as your order ships. Because your kit ships in two packages, you'll receive two separate tracking numbers — one for the panel and one for the power bank. If you haven't received a tracking number within 3 business days of placing your order, contact us at info@whitebrotherselectricsupply.com and we'll look into it right away.

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We're here. Email us at info@whitebrotherselectricsupply.com and we'll get back to you within 24 hours on business days.

White Brothers Electric Supply LLC