Last updated: 2026-11-03
A custom logo solar charger is a foldable solar panel or charger that carries the buyer's logo by printing, engraving or a label. Specify power, size, quantity, target market and logo area; an example 1 W built-in panel needs about 5 sunny days to refill a 5000 mAh power bank, so choose the format first.
When a buyer asks for a custom logo solar charger, the artwork is the easy part: the open questions are panel watts, battery capacity, output ports and where the logo can sit without shading a cell. A logo adds nothing if the charger cannot refill its own battery in a useful time. This guide lists what to confirm before the requirement goes to a supplier.
Buying checklist: requirements to confirm
A buyer of a custom logo solar charger should confirm the product format, power, size, quantity, target market, logo method and logo placement before sending a requirement.
- Choose the format: a solar power bank with a built-in panel, a foldable panel with USB output, or a foldable panel plus a separate power bank.
- Set the power targets: panel watts for charging in sun, battery capacity for storage, and output watts at the port.
- Set the size and weight limits for the carry pouch, desk or gift box, because panel area and battery size drive both.
- State the quantity and the target market, so labelling and packaging can be planned with the product.
- Supply the logo as a vector file, with the logo size in millimetres and its position on the product.
- Ask which logo methods suit the chosen surface, and approve a logo proof before production.
Battery capacity in mAh depends on voltage, so convert to watt-hours before comparing products: Wh = mAh x V / 1000. For an example 5000 mAh cell at an assumed nominal 3.7 V, that is 5000 x 3.7 / 1000 = 18.5 Wh.
Output connectors need the same care. State USB-A, USB-C or both, and list the devices the charger must power, since a phone, a GPS unit and a headlamp draw different currents. Output watts equal volts times amps, so an example 5 V, 2 A port delivers 10 W.
The application decides how much of the specification matters. A promotional gift spends most of its life in a bag or drawer, so a built-in panel only needs to hold a charge, while a product for hiking or field work needs panel watts that match the daily energy of the devices it charges.
Ask for the evidence a purchasing decision needs: the panel rated power and area, the battery capacity in watt-hours, the output rating at each port and a logo proof. Compare those figures against your own refill calculation from the steps above.
Comparison: options by spec and use case
Three common formats of custom logo solar charger differ in panel watts, storage and logo surface, and the table below compares them by example inputs.
| Format | Example panel input | Example storage | Logo surface |
|---|---|---|---|
| Power bank with built-in panel | 1 W | 5000 mAh (18.5 Wh) inside the housing | Housing face or back |
| Foldable panel with USB output | 10 W | None, charges the device directly | Carry pouch, panel border or fabric cover |
| Foldable panel plus separate power bank | 10 W | 10000 mAh (37 Wh) in a second housing | Panel border and bank housing |
LinkSolar's custom foldable page covers foldable panels under your brand; confirm availability before specifying a power-bank format.
The panel and storage values are example inputs for comparison, not LinkSolar specifications; the real values come from the requirements you send. A buyer who needs 12 V battery charging rather than USB devices should look at solar battery chargers instead.
Logo method is the second comparison. Typical fits are general, and the supplier confirms the method for the actual surface and quantity.
| Logo method | Typically suits | Confirm |
|---|---|---|
| Screen printing | Flat or slightly curved plastic and fabric | Number of colours and ink adhesion on the surface |
| Pad printing | Curved plastic housings and small logo areas | Maximum logo size in millimetres |
| Laser engraving | Bare or coated metal and some plastics | Single-colour result and coating type |
| UV printing | Flat rigid faces with full-colour artwork | Surface texture and flatness |
| Woven or silicone label | Fabric pouches and covers | Stitched or glued attachment |
Colour is a separate check. The same artwork looks different on plastic, metal and fabric, so ask for a colour reference in the logo proof and state which reference system you use.
Foldable formats suit users who need several watts in the field, as covered in the guide to the best foldable solar charger for hiking. The portable solar charger spec guide compares portable formats by specification.
Panel watts versus battery capacity: refill time for a custom logo solar charger
Refill time in days equals battery watt-hours divided by panel watts, peak sun hours and an assumed 0.7 system factor. Peak sun hours are the daily solar energy in kWh per square metre, expressed as hours at 1 kW per square metre.
For an example 5000 mAh battery at 3.7 V, which stores 18.5 Wh, a 1 W panel at 5 peak sun hours and a 0.7 factor adds 1 x 5 x 0.7 = 3.5 Wh per day. A full refill then takes 18.5 / 3.5 = 5.3 days.
| Panel watts | Energy per day (Wh) | Days to refill 5000 mAh (18.5 Wh) | Days to refill 10000 mAh (37 Wh) |
|---|---|---|---|
| 1 W | 3.5 | 5.3 | 10.6 |
| 2 W | 7.0 | 2.6 | 5.3 |
| 5 W | 17.5 | 1.1 | 2.1 |
| 10 W | 35.0 | 0.5 | 1.1 |
Weather changes these results. At 3 peak sun hours the 1 W panel adds 1 x 3 x 0.7 = 2.1 Wh per day, and the 18.5 Wh refill takes 18.5 / 2.1 = 8.8 days instead of 5.3.
A built-in 1 W panel is therefore a top-up feature, and a buyer who needs daily phone charging should specify a foldable panel of several watts. For an example phone battery of 15 Wh, a 1 W panel needs 15 / 3.5 = 4.3 days of output for one charge, while a 10 W panel supplies 35 Wh per day, about 2.3 phone charges.
Order requirements: compatibility and what to confirm
Compatibility for a custom logo solar charger comes down to the devices it must charge, the output connectors, the panel and battery specification, and the surface that carries the logo.
Write the devices and connectors into the requirement. The guide on how to charge a phone with a solar panel covers the phone side, and solar phone chargers lists matching phone-focused products.
Logo placement affects output. Cells in a series string share one current, so shading part of one cell can cut the output of the whole string by more than the area covered, and the logo belongs on the housing, border or cover.
Packaging and labelling carry the logo too. State the retail or gift box, the language of the instruction sheet and any barcode needs, so the artwork covers every printed surface in one brief.
Quantity and target market are required inputs because quantity influences the choice of logo method, and the target market sets the labelling and certification the buyer should confirm with the importer before the artwork is final.
List what is already in hand as well. A buyer with an existing panel design, power bank housing or packaging should say so, because a logo-only requirement differs from a full product requirement.
FAQ
How long does a custom logo solar charger take to charge in the sun?
A 1 W built-in panel takes about 5.3 days at 5 peak sun hours to refill an 18.5 Wh (5000 mAh) power bank, and a 10 W panel takes about half a day. These are worked results with an assumed 0.7 system factor, not measurements of any product.
Can the logo be printed on the solar panel itself?
The logo should sit on the border, housing or cover rather than over the cells. Shading part of a cell cuts the current of its whole series string, so the loss can exceed the share of total area that the logo covers.
What file does a custom logo need?
A vector file is the right format, supplied with the logo size in millimetres and its position on the product. A raster image blurs when it is enlarged to the printable area. Approve a logo proof before production.
Is a custom logo solar power bank enough for daily phone charging?
Not with a small built-in panel, because an example 15 Wh phone needs about 4.3 days of 1 W panel output for one full charge. A 10 W foldable panel supplies about 35 Wh per day at 5 peak sun hours, which is about 2.3 phone charges.
What should a buyer send when asking for a custom logo solar charger?
The required inputs are power, size, quantity and target market. Add the logo file, the logo size and position, the output connectors and the devices the charger must power.
Next step
The next step after the specification is to send the requirements: power, size, quantity and target market, with the logo file and placement. Those inputs fix the format, the logo method and the labelling. LinkSolar is a China-based B2B supplier of custom & OEM solar panels, solar cells and mounting hardware.