Solar Garden Lights – Frequently Asked Questions

Solar garden lights are self-contained outdoor luminaires that generate their own power from a small photovoltaic panel, store it in a rechargeable battery and switch on automatically at dusk. Each unit combines four parts — panel, battery, LED module and controller — so no mains wiring or trenching is needed. They are used to mark paths, walls, fences, steps and planting beds, normally at mounting heights below three metres, rather than for road or large-area lighting. See the six product categories for the housing and beam options we build.

A solar garden light converts daylight into electricity, stores it in a battery and releases it through an LED after dark. The panel charges the battery through a charge controller during the day; a photocell, or the controller's own voltage sensing, detects sunset, switches the LED on and shuts it off at sunrise. The same controller protects the cell against overcharge and deep discharge. Because the cycle repeats daily and the battery is the energy buffer, how long the light runs depends on how much energy the panel collected that day.

The main types are wall lights, fence and step lights, pathway lights, spotlights and floodlights, portable and clip-on lights and decorative lights. What separates them commercially is mounting method, beam pattern, IP rating and light output: wall and step units are usually downward-facing and low output, path lights throw a pool of light at 0.4–0.8 m, spotlights are directional with higher output, and decorative units prioritise appearance over lumens. Each type has its own testing, packaging and certification profile.

No. A solar garden light needs no mains connection at all — the panel, battery and LED are wired internally in the factory, so installation is limited to fixing a bracket or pushing in a ground stake. That removes the cost and compliance burden of an electrician, conduit and permits, which is why solar fixtures are preferred for rental properties, parks and sites where trenching is impractical. The one real constraint is sun access: the panel must see direct light, so a shaded wall may need a remote panel or a different model.

The advantages are zero running cost, no wiring, fast installation and safe low-voltage operation; the limitations are output that tracks daily sunshine, battery ageing after several years, and lower peak brightness than mains fixtures. A solar garden light cannot deliver unlimited light: the energy a small panel of roughly 0.5–5 W collects has to cover a whole night, so designs stay in the tens-to-hundreds-of-lumens range and accept reduced output in winter. Buyers should therefore specify winter performance, not only summer performance.

Yes, but with reduced runtime rather than a hard stop. Cold weather actually helps lithium cells discharge efficiently, while the short day and low sun angle cut the energy collected; lying snow on the panel is the real failure mode. A unit that runs all night in summer may run considerably less in December at high latitude. For winter markets, specify a larger panel and battery, a panel angle above 30°, and a design that allows the panel to be reached and cleared of snow.

Yes, but at a fraction of rated output. A crystalline silicon panel still produces current in diffuse light; under heavy overcast it may generate well under a quarter of its rated power, which is often enough to top up a battery but not enough to recover a full night of use. This is why off-grid garden lights are sized against the worst expected month rather than the best, and why a controller with low-voltage disconnect matters more to service life than a higher peak panel wattage.

Match the fixture to the task, the mounting height and the traffic, not to the wattage on the box. Pathways need low-glare downward light every few metres at knee height — an IP65 aluminium stake light is the usual pattern; steps and fences need wide, shallow light to mark an edge; walls need directional downlighting so light does not glare into windows; driveways and signage need directional spotlights and floodlights with higher output; decorative beds need appearance first. Then check the IP rating against exposure and confirm the panel can actually see the sun.

Most solar garden lights use monocrystalline or polycrystalline silicon panels, with monocrystalline now dominant in compact fixtures. Monocrystalline cells deliver more output per unit of area and cope slightly better with heat and low light, which matters when the panel has to stay small; polycrystalline costs less per watt but needs more area for the same output. Thin-film panels appear in low-cost decorative items and in designs intended for weak, diffuse light. Panel wattage varies widely within this product class because the panel is sized against the LED load and the battery it has to refill in a day, so the datasheet rating matters more than the fixture's advertised brightness.

Monocrystalline is the better choice for garden lights in most cases, because it delivers more power per square centimetre and handles heat and low light slightly better — which lets a small, discreet panel charge a larger battery. Polycrystalline remains viable where panel area is not restricted and cost dominates. For buyers, the cell type is rarely the deciding factor on its own: panel wattage, panel angle and charge-controller quality determine real charging performance far more than the mono/poly label.

LiFePO4 (LFP) is the safer, longer-lived chemistry; conventional lithium-ion (NMC, LCO) stores more energy per gram but degrades faster and tolerates abuse less well. LFP cells have a nominal 3.2 V, a very flat discharge curve, cycle lives typically quoted at 2,000 and above, and thermal runaway around 270 °C; NMC runs at 3.6–3.7 V with roughly 1,000–2,000 cycles. For a garden light that must survive years of daily cycling, LFP is usually the better engineering choice; for the smallest possible housing, NMC still wins. Our battery comparison article works through the trade-offs in more detail.

Multiply nominal voltage by capacity in amp-hours: Wh = V × Ah. A 3.7 V 2,000 mAh cell therefore stores 3.7 × 2.0 = 7.4 Wh, while a 3.2 V 3,000 mAh LFP cell stores 9.6 Wh. To size a light, estimate nightly consumption as LED power in watts × hours of operation, then compare that with usable battery energy — typically about 80% of nominal for lithium cells, to protect cycle life. Comparing mAh alone across chemistries misleads, because the voltages differ by up to half a volt per cell.

Charging time follows panel output, battery capacity and sunlight rather than a fixed number: a flat battery needs roughly battery Wh ÷ effective panel watts hours of good sun, plus charging losses of about 20%. A 1 W panel delivering 0.7 W effective under real conditions will take around ten hours to put 5 Wh into a battery. In practice most garden lights are designed to recover within one good day; if a model needs more than that, its panel is undersized for its battery and runtime will collapse in winter.

Runtime is usable battery energy divided by LED power, so there is no universal figure — published values across our range run from about 6 to 16 hours depending on model, mode and brightness. A light drawing 0.5 W from 6 Wh of usable energy runs about 12 hours; the same battery driving 1.5 W runs about 4. Buyers should treat an “up to X hours” claim as the best-case dim mode, and ask for runtime at the mode and brightness they intend to sell.

Runtime is affected by five things: how much energy the panel actually collected, battery capacity and its state of health, LED power draw in the selected mode, ambient temperature, and how often a PIR sensor triggers the boost mode. Shade, dirt and snow reduce charging; cold reduces usable capacity; repeated triggering can halve runtime because each boost period draws several times the standby current. Runtime therefore has to be quoted as a condition — mode, brightness and season — rather than as one number.

Yes. Battery capacity, cell format and chemistry can be changed for OEM and private-label orders, subject to whether the existing housing and PCB have room for the larger cell. Raising capacity usually needs a taller battery compartment or a different cell format, and may require a larger panel so charging stays within one day. Capacity changes are quoted with the model and volume, because tooling or PCB changes may be involved. The OEM & ODM page lists what else can be specified.

Sometimes. Many sealed garden lights use a factory-sealed battery compartment designed for a three-to-five-year service life, while other models provide a removable cover and a standard cell such as 18650 or a replaceable pack. For B2B buyers, replaceability is a specification decision: sealed units are cheaper and easier to keep waterproof, serviceable units cut e-waste and returns. Ask for the battery access design and, for serviceable models, the exact cell format and capacity before ordering.

Garden lights rarely need more than a few hundred lumens. As a working guide: step and fence markers 10–50 lm, pathway lights 30–150 lm, wall downlights 50–300 lm, decorative units 20–100 lm, and spotlights or floodlights 150–800 lm. Higher figures only help if the panel and battery can sustain them for the hours required. Define the job first — marking an edge versus lighting a sign — then choose the lowest output that does it, because excess output is paid for in battery capacity.

Lumens measure light output; watts measure electrical power consumed, so they are not interchangeable. For LED products the wattage figure says more about battery drain than about brightness. The U.S. Department of Energy makes the distinction explicitly: a watt is a measure of electrical power while a lumen is a measure of brightness, which is why lighting labels lead with lumens. For solar buyers the useful pair is lumen output and lumens per watt, since efficiency decides how much battery energy each hour of light costs.

These are correlated colour temperatures (CCT) in kelvin and describe how warm or cool the white light looks, not how bright it is. As a reference, the U.S. Department of Energy groups warm or soft light at 2700–3000 K, cool or bright light at 3500–4100 K, and blue-white daylight-like light at 5000–6500 K. For gardens 3000 K is the usual default; 4000 K is common where pathway visibility matters; 6500 K reads as security lighting and flattens foliage colour.

Warm white, around 2700–3000 K, renders timber, stone and planting softly and is the usual choice for gardens, hospitality and residential landscaping. Cool white, around 5000–6500 K, appears brighter at the same lumen output and is preferred for security, parking and visibility-critical paths, but it flattens foliage and can look clinical against warm materials. A middle option, 4000 K, is often specified for commercial landscapes because it balances perceived brightness with acceptable colour.

A PIR (passive infrared) sensor detects changes in infrared radiation across its detection zone, so it responds to a moving warm body rather than to light. In a solar light the sensor wakes the controller, which raises the LED from a dim standby level to full output for a set period — commonly 15–30 seconds — and then returns to standby. Because the boost draws several times the standby current, PIR models trade continuous dim light for short bright bursts, which is how they extend runtime from the same battery.

The usual modes are: dusk-to-dawn at fixed brightness; dim standby with PIR boost to full output; sensor-only, where the LED stays dark until movement is detected; and fixed-timer or multi-hour modes set by a switch or remote. Some decorative ranges add colour or scene modes. For a wholesale listing the mode set should be stated explicitly, because “PIR” alone does not define standby brightness, boost level or hold time — and those three values decide the real runtime.

Panel placement decides how much energy the light receives, and therefore how many hours it runs. The panel needs unobstructed sun for as much of the day as possible, facing the equator at an angle close to the site latitude, tilted above 30° so rain and debris slide off, and clear of the fixture's own shadow. A panel that sees only a couple of hours of direct sun can lose more than half its daily energy compared with a full-day exposure, regardless of its rated wattage.

Compare energy, not labels: look at panel wattage, battery capacity in Wh (V × Ah) and LED output in lumens, then check runtime at a stated brightness. A 5 W panel with a 3.7 V 1,200 mAh battery stores 4.4 Wh and cannot sustain a genuinely bright output through a long night; a 2 W panel with a 3.2 V 3,000 mAh LFP cell stores 9.6 Wh and can. Marketplace figures such as “1000 W” usually describe incandescent equivalence, not electrical input.

IP65 means the enclosure is dust-tight and protected against water jets under the test conditions of IEC 60529 — it does not mean the light can be submerged. The first digit rates protection against solids and dust, the second against water, and the standard defines the nozzle, pressure, duration and distance for each level. For garden lights IP65 is the usual minimum for exposed mounting, IP44 is acceptable under a canopy, and IP67 is reserved for units that may sit in standing water. Our IP rating guide explains how to read the digits.

Choose by exposure: IP44 (splash-proof) is acceptable only under a roof or eave; IP65 (dust-tight, jet-proof) is the sensible default for exposed garden and wall mounting; IP67 (temporary immersion) is for fixtures that may stand in water, such as in-ground or dock-side units. Higher is not automatically better — an IP67 housing costs more and can trap moisture if the design has no breather. Confirm that the cable gland and gasket are rated to the same level as the housing.

No — commercial garden lights are water-resistant, not permanently watertight. Even an IP67 unit is rated for temporary immersion under defined conditions, and no solar fixture is designed for indefinite submersion because the panel and battery compartment must accommodate pressure and temperature changes. Field failures usually start at the cable entry, at a gasket hardened by UV, or at a battery cover that was opened and not reseated. Require both an IP rating and a gasket material specification.

The common housing materials are ABS, polycarbonate, die-cast aluminium, stainless steel and, in decorative ranges, glass or ceramic elements. ABS is inexpensive and moulds well but degrades under UV unless stabilised; polycarbonate is tougher and clearer but costs more; die-cast aluminium gives the best heat spreading and premium feel at higher cost and weight; stainless steel serves coastal and architectural ranges. Material choice drives cost, UV life, impact resistance and how the fixture manages LED heat. Our fence and step lights show both ABS and metal housings side by side.

ABS is lighter, cheaper, moulds into complex shapes and is electrically non-conductive, but it needs UV stabilisers to survive years of sun and it insulates the LED, so thermal design has to rely on the PCB and internal metal. Die-cast aluminium spreads and dissipates heat far better, resists UV and impact, and takes a powder-coated finish, but it costs more and weighs more, which raises freight per unit. High-output spotlights usually need aluminium; low-output decorative and step lights are often fine in ABS.

UV degrades polymers: it yellows and embrittles polycarbonate and ABS, hardens rubber gaskets and chalks painted surfaces, which is why outdoor fixtures need UV-stabilised plastics and UV-resistant coatings. The first visible symptoms are usually a gasket that no longer seals or a yellowed diffuser that has lost output; later come cracks at screw bosses and around the panel window. Ask for the plastic grade plus accelerated ageing or UV test data, not only an IP rating.

At minimum: an IP test to IEC 60529, a salt-spray corrosion test to ISO 9227 for aluminium or coastal-spec parts, a battery safety report plus the UN 38.3 test summary, a high and low temperature operating check, a drop test on carton and housing, and a 100% functional and water-soak check on the line. Where lumen claims matter commercially, add an integrating-sphere or goniophotometer report. A quality management certificate such as ISO 9001 supports these results but does not replace them.

MOQ depends on the model and the customization level, so there is no single number for the range. Standard models can be ordered in trial quantities, while logo printing, custom retail packaging, custom colour or new tooling each raise the minimum because of setup and material runs. The current MOQ for a specific SKU is confirmed in the quotation alongside the price break at each quantity. First-time buyers should ask for MOQ and lead time for the exact configuration they intend to sell, not for the catalogue in general.

Yes — sampling is the normal first step. Order one or a few units of the exact model and configuration you intend to buy, check light output, colour temperature, build quality and packaging, then place the bulk order. Sample cost and shipping are quoted per model, and customized versions are usually produced as pre-production units. Test samples outdoors at night rather than on a bench: photocell behaviour, PIR range and real runtime only show up under actual sky conditions.

Compare on evidence, not on the catalogue. Request the same model from each supplier, then verify actual panel wattage, battery capacity in Wh, LED output in lumens, IP rating with its test basis, and which certifications each can document. Then compare commercial terms — MOQ, tooling, sample lead time, production lead time, packaging standard and warranty — for an identical configuration. A supplier who cannot state battery Wh or the IP test standard is a supply risk whatever the price. Our wholesale selection guide sets out the checklist.

Confirm at least: model and material code, LED type and lumen output with the mode it was measured in, CCT, panel type and wattage, battery chemistry, voltage and capacity in Wh, runtime per mode, IP rating and the standard it was tested to, control type (photocell, PIR, remote), housing material and finish colour, packaging format, barcode and label requirements, and the certification documents to be supplied. Written confirmation of these points prevents most disputes, because they are exactly the parameters that decide whether the product sells.

Yes, mixed models in one shipment are normal for wholesale and distributor orders, including mixing across the six product categories. Two constraints apply: each model still has to meet its own MOQ for the price break to hold, and cartons must be packed so a mixed pallet or container stays stable and master carton labels stay readable. Mixed orders are quoted with a per-model quantity table and a total carton count, which is also what the freight forwarder needs for booking.

Price is driven by the bill of materials — panel wattage, battery chemistry and capacity, LED type, housing material — plus the IP rating and sealing design, the customization level (logo, colour, packaging, tooling), the order quantity and the shipping terms. Certification scope also affects cost, since compliance testing is amortised over the order. Because these variables move together, a price quoted without model, configuration and quantity is not comparable with another supplier's number.

A usable quotation states model and full configuration, quantity and unit price at each price break, MOQ, any tooling or setup cost, sample cost, packaging specification with carton dimensions, gross and net weight, lead time from deposit and from artwork approval, Incoterm with named port, validity period, payment terms and warranty. For battery products it should also confirm UN 38.3 test summary availability, because that decides whether the consignment can move by air. Our import guide explains each line.

Start from the installation types that dominate locally, then narrow by climate and compliance. A cold-winter market needs winter runtime data and panels that shed snow; a coastal market needs corrosion-resistant housings and salt-spray evidence; a market with strict retail listing rules needs the right certification file and retail-ready packaging. Then rank the shortlist on sell-through evidence — lumen output per price point, warranty cost and return rate — rather than on catalogue breadth.

OEM means the buyer specifies the product — often from an existing design or drawing — and the factory manufactures it under the buyer's brand; ODM means the factory's own design is branded and sold by the buyer, with limited or no design change. Most solar garden light projects sit between the two: a proven housing with buyer-specified branding, packaging, CCT and battery. The distinction matters because it decides who owns the design, who carries the compliance evidence and how much tooling cost appears in the quotation. The OEM & ODM page sets out the three cooperation models.

Yes. A logo can be applied by pad printing, silk screen, laser marking or a moulded badge, depending on housing material and surface. The usual constraints are printable area, the minimum line width the process can hold, colour count, and whether the mark must survive UV and cleaning. Logo application normally carries its own setup cost and raises the MOQ, and it is applied after the housing is finished, so artwork approval is required before the production run starts.

Yes — colour box, printed sleeve, blister, gift box, inner tray, manual, barcode and master carton can all be customized. Retail-ready packaging for e-commerce additionally needs an FNSKU or EAN barcode, a matching carton label and an inner structure that survives drop testing. Custom packaging carries a die-cut cost and its own MOQ, often higher than the product MOQ because printing is bought in runs, and artwork proofing happens before the production run starts.

Yes, within the limits of the housing. Panel wattage and cell type can change if the panel window and mounting allow it; battery chemistry, voltage and capacity can change if the compartment has room and the controller is compatible. A larger battery normally needs a larger panel to recharge in a day, so the two are specified together. Any change to cell type or capacity also creates a different battery type for transport testing purposes, so the UN 38.3 evidence has to be re-confirmed.

Yes. Housing colour is a paint or moulding change — powder coating on aluminium, masterbatch colour on ABS — each with its own minimum run. Lighting mode sets (dusk-to-dawn, dim-plus-PIR, sensor-only, multi-hour timer) are configured in the controller firmware or by a switch, so they change without new tooling, though each variant needs its own SKU and packaging. Colour temperature changes come from LED bin selection during assembly.

Yes. New tooling is possible for a genuinely new housing or a structural change, quoted separately with tooling cost, development timeline and a minimum first order. Most private-label projects do not need new moulds: an existing housing plus colour, logo, CCT, battery and packaging changes produces a distinct product faster. Where a new mould is justified, the drawing, parting line, IP sealing design and panel window are agreed before steel is cut.

To quote accurately we need six inputs: the target model or a reference photo, the quantity per SKU and per shipment, the customization scope (logo, colour, CCT, battery, packaging), the destination market so certification can be checked, artwork files for logo and packaging with barcode requirements, and the required delivery window. With those, a quotation can carry real MOQ, tooling, lead time and price breaks instead of a placeholder range. Send them through the contact form and we will respond with a model recommendation.

Which marks apply depends on the destination market and on what the fixture contains. In the EU the baseline is CE marking under the applicable directives plus RoHS for hazardous substances; in the US, FCC authorisation applies only if the product contains a radio-frequency device, while safety is assessed against UL or ETL standards as a retailer requirement rather than a federal one; for transport, lithium batteries need UN 38.3 test summaries. Specify market and sales channel, because marketplace rules often exceed the legal minimum.

CE marking is the manufacturer's own declaration that the product meets the applicable EU legislation — it is not issued or approved by an EU authority. An independent certificate from a notified body or test laboratory is third-party evidence that specific tests were passed, and a notified body is only mandatory where the relevant directive requires one. The European Commission states that CE marking does not mean a product has been approved as safe by the EU. Buyers wanting third-party proof should ask for the test report, not just the mark.

RoHS restricts ten hazardous substances in electrical and electronic equipment: lead, mercury, cadmium, hexavalent chromium, PBB, PBDE, and the four phthalates DEHP, BBP, DBP and DIBP. EU rules require all products with an electrical or electronic component to comply unless specifically excluded, with limits set in Annex II — 0.1% by weight in homogeneous materials for most substances and 0.01% for cadmium. Compliance is evidenced by tests on the homogeneous materials, not by one whole-product test.

FCC authorisation is relevant only when the fixture contains a radio-frequency device — a 2.4 GHz remote, Wi-Fi or Bluetooth control, or a wireless sensor. A standard solar garden light with a photocell and passive infrared sensor transmits nothing and sits outside the FCC equipment authorisation regime, which requires RF devices to be authorised under 47 CFR part 2 before they are marketed or imported into the United States. If a model ships with a wireless remote, the remote's transmitter is what triggers the requirement.

UN 38.3 is the battery section of the UN Manual of Tests and Criteria: eight design tests — altitude, thermal, vibration, shock, external short circuit, impact, overcharge and forced discharge — that a lithium cell or battery type must pass before it can be offered for transport. The U.S. Department of Transportation states that cells and batteries offered for transportation must have passed these design tests, and since 21 January 2022 manufacturers must make a test summary available on request. A summary is a document, not a per-shipment certificate.

A Safety Data Sheet is a 16-section document describing hazards, composition, handling, storage, transport and disposal of a substance or mixture in the GHS format. For a solar light the relevant SDS is usually for the battery or a chemical component rather than for the finished luminaire, and it is a different document from the UN 38.3 test summary. Importers typically need the battery SDS for customs clearance and carrier acceptance, because carriers treat lithium cells as dangerous goods.

Verify four things: the report names the exact model or a family that demonstrably covers it, the laboratory is accredited for that test method, the standard and edition cited are the current ones, and the report number can be checked with the issuing laboratory. A CE declaration of conformity and an ISO 9001 certificate are not test reports — they state different things. Also check that the report date is after the last design change, because a battery or driver change can invalidate earlier results. Our factory and quality-control process explains how we keep that file current per model.

Each unit goes into its retail box, retail boxes into a master carton sized to a standard pallet module, and the carton is labelled with model, quantity, gross weight, dimensions and barcode. Solar fixtures need three protections in transit: the panel face against scratching and pressure, the stake or bracket against bending, and the battery against impact and short circuit. Cartons are drop-tested to the buyer's or retailer's standard and, for sea freight, strapped and palletised with edge protection.

Yes. Retail barcodes (EAN/UPC), Amazon FNSKU labels, carton and pallet labels, multilingual manuals, warranty cards and inserts can all be included, and this is standard for private-label orders. Two practical points: barcode data must arrive as a verified file to avoid rescanning fees at the marketplace, and manuals must match the certification and language requirements of the destination market. Artwork and barcode data are approved before printing, because packaging runs are not reworkable.

Lead time depends on the model, order quantity, customization scope and season. Standard models from stock move fastest; logo and custom packaging add artwork proofing and a printing run; a new housing mould adds tooling time; battery packs add cell procurement. Peak season before Christmas and around Chinese New Year compresses factory capacity, so buyers with fixed retail windows should book production slots early. Actual figures are quoted per order rather than published as a single number.

Sea freight (FCL or LCL), rail to Europe, air freight and express couriers are all used, and the choice is driven by volume, urgency and whether the consignment contains lithium batteries. Sea is the default for carton volumes because the cost per unit is lowest; air and express serve samples and replenishment. Lithium cells are regulated for transport, so carrier, state of charge and packaging must meet the applicable rules — which is why the UN 38.3 summary and battery SDS are requested early.

Expect to need the UN 38.3 test summary for the battery type, a Safety Data Sheet for the cell, a commercial invoice and packing list, and for air or sea movements the dangerous goods declaration with the applicable lithium battery handling label. Which of these apply depends on whether the battery is installed in the equipment, packed with it or shipped separately, and on the mode of transport. Carriers reject incorrectly declared lithium shipments, so documents are checked before booking.

Confirm the terms in writing before the order: warranty period and what it covers (driver, battery, panel, housing finish), what is excluded (water ingress from incorrect installation, normal battery wear, cosmetic change), the claim process and evidence required, whether the remedy is replacement parts or credit, and who pays freight. For solar products the battery is the usual wear item, so a separate battery coverage period is worth agreeing. Warranty terms are quoted per order and per market — talk to us with your market and volumes.