A small solar power box rated 1 A at 12 V can feed 12 W of strip at most, and on a full pack that load runs about 4.5 hours, so the panel and pack, not the strip, set how long a solar strip stays lit.
A solar LED light strip is a low-voltage LED strip powered by a solar panel that charges a battery through a charge controller during the day. Size it from strip watts per meter (W/m) × length × hours per night to get daily watt-hours (Wh), then battery Wh for the nights you need, then panel watts from worst-month sun hours plus 20 to 30 % losses.
The sections below list the parts of a strip system and walk through the sizing steps with an illustrative example. They then compare 12 V with 24 V strips, set out the power options in a table and cover IP ratings and panel placement.
The last part weighs an all-in-one kit against a separate panel or a custom panel. LinkSolar supplies the power side of a strip system as a sourcing partner, with small solar panels from 0.1 W to 25 W and electrical figures published on each product page, so a strip can be sized before ordering.
What is a solar LED light strip system made of?
A solar LED light strip system has five parts, the LED strip, the solar panel, the battery, the charge controller and a switch or dusk sensor, and each part is sized from the one before it. The strip sets the load, and the power side is built to carry that load through the night.
- LED strip: A low-voltage LED strip is rated in watts per meter (W/m), the power one meter of strip draws, and it can be cut only at the marked cut points.
- Solar panel: The panel is rated in watts (W) at full sun, and its Vmp, the voltage at maximum power, has to suit the input of the controller or charger it feeds.
- Battery: The battery stores the day's energy in watt-hours (Wh), which equal its voltage (V) multiplied by its amp-hours (Ah).
- Charge controller: The controller keeps the battery inside its safe voltage window while it charges and disconnects the strip at low voltage to protect the battery.
- Switch or dusk sensor: A manual switch turns the strip on by hand, while a dusk sensor turns it on when daylight fades.
LEDs suit a solar supply because they turn a small amount of power into a lot of light. According to the U.S. Department of Energy, LED efficacy reaches up to 150 lumens per watt in some specialized products. Light output per meter of strip varies with LED density, so compare strips on W/m first, because that figure drives every other part.
Low-voltage strips are typically sold as 5 V (USB), 12 V and 24 V DC. Their draw typically runs from around 4 W/m on low-density strips to around 15 W/m or more on dense ones, so two strips of equal length can need very different power parts.
Of the five parts, the solar panel is the one that sets run time, because it has to refill whatever the strip drew overnight. That is why the sizing below starts at the strip and ends at the panel.
How do you size the solar panel and battery for an LED strip?
A solar LED light strip is sized from its daily energy: strip watts per meter × length in meters × hours per night gives watt-hours per day (Wh/day), and the battery and panel both follow from that one number. Daily watt-hours are the energy the strip draws in one night, so every later step scales from them.
- Read the strip rating: Take the watts per meter (W/m) from the strip label, measure the run in meters, and multiply the two to get the strip's total watts.
- Multiply by the night: Multiply the strip watts by the hours the strip stays on each night to get Wh/day.
- Add the losses: Add 20 to 30 % to the daily figure for controller, wiring and temperature losses, the margin the LinkSolar custom mini panel sizing method uses.
- Size the battery: Battery Wh equals daily Wh × nights of autonomy ÷ usable depth of discharge (DoD, the share of capacity the battery can deliver), for example 80 % for LiFePO4.
- Size the panel: Panel watts come to roughly the loss-adjusted Wh/day ÷ the peak sun hours of the worst month at the site.
Here is an illustrative worked example with typical strip figures, not a product claim. A 2 m run of strip at around 4.8 W/m draws 2 × 4.8 = 9.6 W, and 5 hours a night gives 9.6 × 5 = 48 Wh/day. Adding 25 % for losses gives 48 × 1.25 = 60 Wh/day.
At 4 peak sun hours in the worst month, the panel comes to 60 ÷ 4 = around 15 W. For 2 nights of autonomy on LiFePO4 at 80 % DoD, the battery comes to 48 × 2 ÷ 0.8 = 120 Wh.
A live LinkSolar product page puts those figures in context. The 25 W panel box with built-in MPPT harvests roughly 55 to 75 Wh on a clear day at 3 to 4 peak sun hours, holds around 55 Wh usable with six 3,300 mAh cells, and supports a continuous load of about 2 to 3 W year-round.
The 60 Wh/day example sits at the top of what one such box refills on a clear day, and its 120 Wh battery is more than twice the box's usable storage. Winter brings fewer sun hours, so the worst month sets the panel and battery size for a strip that has to light every night.
The panel refills during the day what the strip drew overnight, which is the loop covered in how a panel charges a battery through a controller. For fixture loads rather than strips, the guide to sizing solar for signage and area fixtures covers the method.
Should a solar LED strip run on 12 V or 24 V?
A solar LED strip should run at the same voltage as its battery and charge controller: 12 V suits short runs on a 12 V battery, and 24 V suits longer runs because it carries half the current for the same watts. Lower current means less loss along the thin copper inside the strip. The battery and controller are chosen to match the strip label.
According to the U.S. Department of Energy, a solar panel generates direct current (DC), and an inverter converts it to alternating current. A 12 V or 24 V strip runs on DC as well. A small strip system therefore needs a charge controller between the panel and the battery, and no inverter.
On the 12 V side, the LinkSolar power parts set these limits for a strip:
- Controller: The 10 A 12 V MPPT charge controller is a 12 V system part, so it pairs with a 12 V battery and a 12 V strip.
- Multi-voltage boxes: The 4 W, 8 W, 12 W and 25 W mini panel boxes give a selectable 5, 6, 9 or 12 V DC output, with 12 V rated at 1 A.
- Strip cap on one box: A 12 V strip on one box is capped at 12 W, which is around 2.5 m of a strip drawing around 4.8 W/m.
- USB strips: A 5 V USB strip runs from the 5 V 2 A output on the same boxes.
Voltage drop shows up first at the far end of a long 12 V run, where the LEDs dim first. Feed the strip from the middle or from both ends, or move the system to 24 V with a matching battery and controller. Keep the cable from the power source to the strip short, and size the wire gauge for a drop under 3 to 5 %.
The wiring guide on cable gauge and voltage drop on 12 V runs covers the gauge choice for a 12 V load. On the panel side, a separate guide explains when MPPT beats PWM on a small panel.
Specs to compare before you order: which solar power option fits your strip?
A solar power option fits an LED strip when it carries the strip's watts at the strip's voltage and stores enough energy for the night, and every part that sits outdoors carries its own IP rating. Rated output current sets the first limit, because 1 A at 12 V is 12 W of strip. Stored watt-hours and the panel's daily refill set the other two.
Four lines on a spec sheet carry most of the decision for a first-time buyer.
- Output: The multi-voltage boxes switch between 5 V, 6 V, 9 V and 12 V DC through a 5.5 × 2.1 mm plug, so one box feeds a USB strip or a 12 V strip.
- Max strip load at 12 V: Each box is rated 1 A at 12 V, which caps a 12 V strip at 12 W, or around 2.5 m of strip at around 4.8 W/m.
- Storage: The boxes take up to six 18650 cells in parallel, supplied separately, for up to about 19,800 mAh with 3,300 mAh cells.
- IP: Each box housing is rated IP66, and the strip's own IP rating is a separate number for its own exposure.
Read the table against the illustrative load from the sizing steps: 2 m of strip at around 4.8 W/m for 5 hours a night comes to about 60 Wh a day once losses are added. The 25 W box with built-in MPPT holds around 55 Wh usable and harvests roughly 55 to 75 Wh on a clear day, so its year-round continuous load sits at about 2 to 3 W. A 60 Wh daily load outgrows every all-in-one box in winter, so it moves to a separate panel with a 10 A 12 V MPPT charge controller and a 12 V battery sized to the nights you need.
The smaller boxes suit lighter duty. A 4 W box fits a 5 V USB strip or a short accent run, the 8 W box with back-contact cells fits a short 12 V run for a few hours, and a 12 W box fits shelf or step lighting. To match a panel to the space on a rail, sign or roof edge, check panel outlines by watts and volts.
When the panel has to fit a housing or rail, a custom mini panel is the last row. It typically runs 0.1 to 20 W, with its Vmp set to the charger input and its outline cut to the millimeter.
| Option | Panel W | Output | Max strip load at 12 V | Storage | IP | Fits |
|---|---|---|---|---|---|---|
| 4 W box | 4 W | 5 / 6 / 9 / 12 V selectable | 12 W rated (1 A); panel refills far less | Up to six 18650 cells (not included) | IP66 | 5 V USB strips, a short accent run |
| 8 W box | 8 W, no MPPT | 5 / 6 / 9 / 12 V selectable | 12 W rated (1 A) | Up to six 18650 cells (not included) | IP66 | A short 12 V run for a few hours |
| 12 W box | 12 W | 5 / 6 / 9 / 12 V selectable | 12 W rated (1 A) | Up to six 18650 cells (not included) | IP66 | Shelf or step lighting, short runs |
| 25 W box with built-in MPPT | 25 W | 5 / 6 / 9 / 12 V selectable | 12 W rated (1 A); sustains about 2 to 3 W year-round | Around 55 Wh usable with six 3,300 mAh cells | IP66 | The largest all-in-one option |
| Separate panel + 10 A 12 V MPPT controller + 12 V battery | Sized to the load | 12 V system | Set by controller and battery | Battery Wh chosen to the load | Check each part | Longer 12 V strips, gates, signs |
| Custom mini panel | 0.1 to 20 W typical, Vmp set to the charger | To spec | To spec | To spec | To spec | A panel that must fit a housing or rail |
LinkSolar publishes Voc, Isc, Vmp, Imp, dimensions and lead type on each product page, so you can compare mini panels and 12 V power boxes for a strip and size the system before ordering.
Box outputs are rated figures; strip draw is typical. MOQ varies by supplier; confirm before ordering.
Which needs the higher IP rating, the strip or the panel, and where should the panel go?
A solar LED light strip system needs an IP rating on the strip and another on the panel for its own exposure, and the panel needs the tougher rating because it always sits in open sky and rain. The strip often runs under a rail, eave or step, where a silicone jacket keeps it protected.
An IP (ingress protection) rating is a two-digit code in which the first digit rates protection against dust and the second rates protection against water. The multi-voltage mini panel boxes and the 25 W box with built-in MPPT in the LinkSolar catalogue list an IP66 housing. Ask the supplier for the test report behind the IP rating on the part you order.
Strips typically come in three jacket styles, each rated separately from the panel:
- Bare strip: A bare strip typically suits indoor and dry runs.
- Silicone-coated strip: A coated strip typically suits sheltered outdoor runs under a handrail, eave or step edge.
- Silicone-filled or tube strip: A filled or tube strip is the typical choice for wet locations with direct rain or splash.
Mount the panel where it sees the most sun and run a cable to the strip, because the strip usually lives in the shaded spot it is meant to light.
- Face the panel toward the equator: Point it south in the northern hemisphere and north in the southern hemisphere.
- Clear the panel of shade: Place it away from eaves, branches and fences that shade it at midday.
- Route the cable along a protected line: Run it along the rail or wall to the strip's feed point by the shortest path.
- Seal the cable entry and the connector: Use a sealed gland where the cable enters the box and a waterproof in-line connector, with a drip loop below it to shed water.
For a panel left outdoors all year, choose the front surface along with the housing rating. The LinkSolar mini panel collection lists ETFE for long outdoor exposure and UV resistance, tempered glass for abrasion, and matte PET for sheltered use.
All-in-one strip kit, separate panel or custom panel: which one fits the job?
An all-in-one solar LED strip kit fits a few meters of decorative strip, a separate solar panel fits any strip load the kit's panel cannot refill, and a custom mini panel fits a product where the panel must match a housing, rail or charger voltage.
An all-in-one kit pairs a small panel, a small cell and a light sensor in one package. These kits typically run at 3 V to 5 V and light a few meters of strip for a few hours. They suit accent lighting on a fence or balcony rail.
A separate panel system scales each part to the strip. The illustrative 2 m run from the sizing steps needs around 15 W of panel and 120 Wh of battery, charged through a controller such as a 10 A 12 V MPPT unit. This route suits longer 12 V strips, gates and signs.
When the panel has to fit a housing, a rail or a set charger input, LinkSolar sources custom mini panels sized to a strip load through partner factories, with factory-side QA. A first inquiry carries these lines.
- Strip load: Give the strip's W/m and the run length in meters.
- Hours per night: State how long the strip stays lit each night.
- Site: Name the location or its worst month for sun, which sets the panel watts.
- Battery: Specify the battery chemistry and voltage, for example a 12 V LiFePO4 pack.
- Outline and mounting: Send the panel outline in mm and choose an adhesive back or screw holes.
- Connector: Pick JST or Molex leads or a pre-crimped harness to match the controller.
- Quantity: Add the planned order quantity.
The reply is a written specification with a target Vmp and Imp for the charger input, the lamination and the connector. In production, partner factories check each batch with EL (electroluminescence) imaging, IV binning and visual inspection. For a slim rail or enclosure, read why SMT mini panels stay thin before choosing glass, ETFE or PET for the front surface.
FAQ: solar LED light strips
How long does a solar LED strip stay on at night?
A solar LED strip stays on for roughly the battery's usable Wh divided by the strip's watts. A 25 W panel box with built-in MPPT holds around 55 Wh usable with six 3,300 mAh cells, and a 12 V load at its full 1 A (12 W) runs about 4.5 hours on a full pack. The panel produces no power after dark, as covered in what a panel does after sunset, so every hour of light comes from stored charge.
Can you cut a solar LED strip?
A solar LED strip can be cut only at the marked cut points printed along its length. A shorter strip draws fewer watts, so the same battery keeps it lit for longer. Recalculate the daily Wh with the new length before choosing the panel and battery.
Does a solar LED strip work in winter or cloud?
A solar LED strip works through winter and cloud when its panel is sized for the worst month at the site. Panel watts come from daily Wh divided by that month's peak sun hours, so fewer sun hours call for a larger panel while the strip load stays the same. Battery autonomy of 1 to 5 days, set by how critical the light is, carries the strip through a run of cloudy days.
Is a solar street light the same as a solar LED strip?
A solar street light is a separate product: a pole-mounted fixture with its own panel and battery, sized for area lighting. A solar LED strip is a linear, low-voltage light run fed by a panel and battery that are sized to its watts per meter. This guide covers linear strips, and a street light follows fixture sizing logic.
Next step
The strip label gives you W/m, so does your panel refill that load every winter day?
Send the strip W/m, run length, hours per night and site location, and LinkSolar, a sourcing partner with direct factory-side QA, returns a matched panel and battery specification. To request a quote, use custom panel quotes from an outline and a load figure.