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Callsun 15W 12V Solar Battery Maintainer & Trickle Charger: Callsun's lead product image for the 15W 12V Solar Battery Maintainer & Trickle Charger, from its product page.
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Manufacturer and seller images. Configuration examples may include additional equipment.

Image source: Callsun's lead product image for the 15W 12V Solar Battery Maintainer & Trickle Charger, from its product page.

Callsun 15W 12V Solar Battery Maintainer & Trickle Charger

By CallsunSKU CS15W-G1V1-US

Solar panel
Evidence score3/100
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Rated output15 WEfficiencyNot statedW / sq ft13.8*Voltage (STC)20.16 VVmp · maximum powerVoc · open circuit24.3 VMax systemNot statedCurrent (STC)0.75 AImp · maximum powerIsc · short circuit0.79 ADimensionsD: 20 × W: 333 × L: 303 mmWeight1.7 kg / 3.75 lbWarranty1 yearPower warrantyNot statedConstructionSingle-sided (unconfirmed). No bifacial claim found in the maker's documents. The site groups this module as single-sided by default; this is not a manufacturer claim.FormatrigidCellsMonocrystalline Silicon

Key specs

Units
SKU
CS15W-G1V1-US
Official product page
Sources

Callsun's store data on the page gives the single-panel variant the SKU CS15W-G1V1-US; the SKU is in the page markup, not the visible text. Captured on September 25, 2026.

Official product page: Callsun 15W 12V Solar Battery Maintainer & Trickle Charger product page Checked · Earlier document

Location: Product store data in the page markup, variant sku

Documented

Rated output (STC)
15 W
Official user manual
Sources

Read from rendered page 3 (the PDF has no text layer): Specifications table, Maximum Power at STC (Pmax) row, CS-SG15WBC column of Callsun's Intelligent Solar Battery Trickle Maintainer User Manual V1.0.0 shows "15W". Re-cited on 1 October 2026 to the manufacturer's own document; previously cited to Callsun (callsunsolar.com), which stays listed as an additional source.

Official user manual: Callsun Intelligent Solar Battery Trickle Maintainer User Manual V1.0.0 Rev V1.0.0 · Checked · Earlier documentOfficial product page: Callsun 15W 12V Solar Battery Maintainer & Trickle Charger product page Checked · Earlier document

Location: PDF page 3, Specifications table, Maximum Power at STC (Pmax) row, CS-SG15WBC column

Documented

Voltage at max power (Vmp)
20.16 V
Official user manual
Sources

Read from rendered page 3 (the PDF has no text layer): Specifications table, Maximum Power Voltage at STC (Vmp) row, CS-SG15WBC column of Callsun's Intelligent Solar Battery Trickle Maintainer User Manual V1.0.0 shows "20.16V". Re-cited on 1 October 2026 to the manufacturer's own document; previously cited to Callsun (callsunsolar.com), which stays listed as an additional source.

Official user manual: Callsun Intelligent Solar Battery Trickle Maintainer User Manual V1.0.0 Rev V1.0.0 · Checked · Earlier documentOfficial product page: Callsun 15W 12V Solar Battery Maintainer & Trickle Charger product page Checked · Earlier document

Location: PDF page 3, Specifications table, Maximum Power Voltage at STC (Vmp) row, CS-SG15WBC column

Documented

Current at max power (Imp)
0.75 A
Official user manual
Sources

Read from rendered page 3 (the PDF has no text layer): Specifications table, Maximum Power Current at STC (Imp) row, CS-SG15WBC column of Callsun's Intelligent Solar Battery Trickle Maintainer User Manual V1.0.0 shows "0.75A". Re-cited on 1 October 2026 to the manufacturer's own document; previously cited to Callsun (callsunsolar.com), which stays listed as an additional source.

Official user manual: Callsun Intelligent Solar Battery Trickle Maintainer User Manual V1.0.0 Rev V1.0.0 · Checked · Earlier documentOfficial product page: Callsun 15W 12V Solar Battery Maintainer & Trickle Charger product page Checked · Earlier document

Location: PDF page 3, Specifications table, Maximum Power Current at STC (Imp) row, CS-SG15WBC column

Documented

Open-circuit voltage (Voc)
24.3 V
Official user manual
Sources

Read from rendered page 3 (the PDF has no text layer): Specifications table, Open-circuit Voltage at STC (Voc) row, CS-SG15WBC column of Callsun's Intelligent Solar Battery Trickle Maintainer User Manual V1.0.0 shows "24.3V". Re-cited on 1 October 2026 to the manufacturer's own document; previously cited to Callsun (callsunsolar.com), which stays listed as an additional source.

Official user manual: Callsun Intelligent Solar Battery Trickle Maintainer User Manual V1.0.0 Rev V1.0.0 · Checked · Earlier documentOfficial product page: Callsun 15W 12V Solar Battery Maintainer & Trickle Charger product page Checked · Earlier document

Location: PDF page 3, Specifications table, Open-circuit Voltage at STC (Voc) row, CS-SG15WBC column

Documented

Short-circuit current (Isc)
0.79 A
Official user manual
Sources

Read from rendered page 3 (the PDF has no text layer): Specifications table, Short-circuit Current at STC (Isc) row, CS-SG15WBC column of Callsun's Intelligent Solar Battery Trickle Maintainer User Manual V1.0.0 shows "0.79A". Re-cited on 1 October 2026 to the manufacturer's own document; previously cited to Callsun (callsunsolar.com), which stays listed as an additional source.

Official user manual: Callsun Intelligent Solar Battery Trickle Maintainer User Manual V1.0.0 Rev V1.0.0 · Checked · Earlier documentOfficial product page: Callsun 15W 12V Solar Battery Maintainer & Trickle Charger product page Checked · Earlier document

Location: PDF page 3, Specifications table, Short-circuit Current at STC (Isc) row, CS-SG15WBC column

Documented

Cell technology
Monocrystalline Silicon
Official user manual
Sources

Read from rendered page 3 (the PDF has no text layer): Specifications table, Cell Type row of Callsun's Intelligent Solar Battery Trickle Maintainer User Manual V1.0.0 shows "Monocrystalline Silicon". Re-cited on 1 October 2026 to the manufacturer's own document; previously cited to Callsun (callsunsolar.com), which stays listed as an additional source.

Official user manual: Callsun Intelligent Solar Battery Trickle Maintainer User Manual V1.0.0 Rev V1.0.0 · Checked · Earlier documentOfficial product page: Callsun 15W 12V Solar Battery Maintainer & Trickle Charger product page Checked · Earlier document

Location: PDF page 3, Specifications table, Cell Type row

Documented

Panel format
rigid
Official product page
Sources

Recorded as rigid because the Specs tab prints a tempered glass layer and an anodized aluminum frame ("Glass 1.6mm Tempered Glass Frame Anodized Aluminium Alloy"); Callsun's menu lists the product under its solar panels for battery maintenance or cameras rather than under Rigid Solar Panels. Callsun's 15W 12V Solar Battery Maintainer & Trickle Charger product page, captured on September 25, 2026.

Official product page: Callsun 15W 12V Solar Battery Maintainer & Trickle Charger product page Checked · Earlier document

Location: Specs tab, Glass and Frame rows

Documented

Front glass
1.6mm Tempered Glass
Official product page
Sources

Printed as "Glass 1.6mm Tempered Glass" on Callsun's own product page for CS15W-G1V1-US, captured on September 28, 2026. Printed in the "Why Choose Callsun Solar Panel" table; the value quoted is from the "Callsun Solar Panel" column, not the "Other Solar Panels" column.

Official product page: 15W 12V Solar Battery Maintainer & Trickle Charger product page (Callsun, September 28, 2026 capture) Checked · Earlier document

Location: Specifications table, Glass row

Documented

All specs16
Rated output (STC)
15 W
Official user manual
Sources

Read from rendered page 3 (the PDF has no text layer): Specifications table, Maximum Power at STC (Pmax) row, CS-SG15WBC column of Callsun's Intelligent Solar Battery Trickle Maintainer User Manual V1.0.0 shows "15W". Re-cited on 1 October 2026 to the manufacturer's own document; previously cited to Callsun (callsunsolar.com), which stays listed as an additional source.

Official user manual: Callsun Intelligent Solar Battery Trickle Maintainer User Manual V1.0.0 Rev V1.0.0 · Checked · Earlier documentOfficial product page: Callsun 15W 12V Solar Battery Maintainer & Trickle Charger product page Checked · Earlier document

Location: PDF page 3, Specifications table, Maximum Power at STC (Pmax) row, CS-SG15WBC column

Documented

Voltage at max power (Vmp)
20.16 V
Official user manual
Sources

Read from rendered page 3 (the PDF has no text layer): Specifications table, Maximum Power Voltage at STC (Vmp) row, CS-SG15WBC column of Callsun's Intelligent Solar Battery Trickle Maintainer User Manual V1.0.0 shows "20.16V". Re-cited on 1 October 2026 to the manufacturer's own document; previously cited to Callsun (callsunsolar.com), which stays listed as an additional source.

Official user manual: Callsun Intelligent Solar Battery Trickle Maintainer User Manual V1.0.0 Rev V1.0.0 · Checked · Earlier documentOfficial product page: Callsun 15W 12V Solar Battery Maintainer & Trickle Charger product page Checked · Earlier document

Location: PDF page 3, Specifications table, Maximum Power Voltage at STC (Vmp) row, CS-SG15WBC column

Documented

Current at max power (Imp)
0.75 A
Official user manual
Sources

Read from rendered page 3 (the PDF has no text layer): Specifications table, Maximum Power Current at STC (Imp) row, CS-SG15WBC column of Callsun's Intelligent Solar Battery Trickle Maintainer User Manual V1.0.0 shows "0.75A". Re-cited on 1 October 2026 to the manufacturer's own document; previously cited to Callsun (callsunsolar.com), which stays listed as an additional source.

Official user manual: Callsun Intelligent Solar Battery Trickle Maintainer User Manual V1.0.0 Rev V1.0.0 · Checked · Earlier documentOfficial product page: Callsun 15W 12V Solar Battery Maintainer & Trickle Charger product page Checked · Earlier document

Location: PDF page 3, Specifications table, Maximum Power Current at STC (Imp) row, CS-SG15WBC column

Documented

Open-circuit voltage (Voc)
24.3 V
Official user manual
Sources

Read from rendered page 3 (the PDF has no text layer): Specifications table, Open-circuit Voltage at STC (Voc) row, CS-SG15WBC column of Callsun's Intelligent Solar Battery Trickle Maintainer User Manual V1.0.0 shows "24.3V". Re-cited on 1 October 2026 to the manufacturer's own document; previously cited to Callsun (callsunsolar.com), which stays listed as an additional source.

Official user manual: Callsun Intelligent Solar Battery Trickle Maintainer User Manual V1.0.0 Rev V1.0.0 · Checked · Earlier documentOfficial product page: Callsun 15W 12V Solar Battery Maintainer & Trickle Charger product page Checked · Earlier document

Location: PDF page 3, Specifications table, Open-circuit Voltage at STC (Voc) row, CS-SG15WBC column

Documented

Short-circuit current (Isc)
0.79 A
Official user manual
Sources

Read from rendered page 3 (the PDF has no text layer): Specifications table, Short-circuit Current at STC (Isc) row, CS-SG15WBC column of Callsun's Intelligent Solar Battery Trickle Maintainer User Manual V1.0.0 shows "0.79A". Re-cited on 1 October 2026 to the manufacturer's own document; previously cited to Callsun (callsunsolar.com), which stays listed as an additional source.

Official user manual: Callsun Intelligent Solar Battery Trickle Maintainer User Manual V1.0.0 Rev V1.0.0 · Checked · Earlier documentOfficial product page: Callsun 15W 12V Solar Battery Maintainer & Trickle Charger product page Checked · Earlier document

Location: PDF page 3, Specifications table, Short-circuit Current at STC (Isc) row, CS-SG15WBC column

Documented

Published claims and calculations, not independent test results.

Documents

2 on file
  • PDF
    Callsun Intelligent Solar Battery Trickle Maintainer User Manual V1.0.0OfficialCallsunOfficial user manual
    Source details
    Revision
    V1.0.0
    Revision date
    Not stated

    Archived copy captured on 2026-10-01.

    Location: Cover page (model list) and specifications page

    Retrieved

    Callsun's own user manual for its 7.5W, 15W and 20W 12V Solar Battery Maintainer & Trickle Charger, captured 1 October 2026 from cdn.shopify.com, the file Callsun's product pages link; revision V1.0.0 as printed on the cover; its cover or model list names CS-SG7WBC/CS-SG15WBC/CS-SG20WBC/CS-SG30WBC. The PDF has no text layer, so values were read from rendered pages. It prints model specifications and handling and connection instructions, with no clamp, grounding or cable bending instructions. Manufacturer claims, not independent tests.

    Archived copies

    Archived copy of a document published by Callsun. Copyright retained by the publisher; kept for reference and verification only, no endorsement implied. To ask for its removal, email legal@chargedreviews.com.

    Archived backup V1.0.0 · 0.91 MB

    Archived copy, unaltered, kept as a record of what Callsun published. Original address: https://cdn.shopify.com/s/files/1/0651/5965/9688/files/CS-7.5w15w20w30w_Intelligent_Solar_Battery_Trickle_Maintainer_User_Manual-V1.0.0.pdf?v=1787623399. Copyright and takedown

    Source first found
    This copy captured
    Archived
    File detailsOriginal source
    Pages
    10
    Embedded creation date
    Embedded modification date

    Embedded dates are file metadata, not independent proof of publication.

    SHA-256: c1c671e15d105f00940d8b610b797fd51b1e26093f90a93a7b109d35fa0d799d

    Open
  • WEB
    15W 12V Solar Battery Maintainer & Trickle Charger product page (Callsun, September 28, 2026 capture)OfficialCallsunOfficial product page
    Source details
    Revision
    Not stated
    Revision date
    Not stated

    Archived copy captured on 2026-09-28.

    Retrieved

    Callsun's own product page for CS15W-G1V1-US; a Specifications table on the page prints a Glass row and a Frame row (frame already recorded) but no Back Sheet row.

    Open

Archive and older revisions

Archive and older revisions1

Earlier revisions, archived captures and copies published by someone other than the manufacturer. Every one stays reachable.

  • WEB
    Callsun 15W 12V Solar Battery Maintainer & Trickle Charger product pageOfficialCallsunOfficial product page
    Source details
    Revision
    Not stated
    Revision date
    Not stated

    Location: Specs tab; product store data (variant SKU)

    Retrieved

    Callsun's own US store page, captured on September 25, 2026. Electrical rows are read from the Specs tab, which prints an STC footnote; the product SKU is read from the page's store data in the markup, not the visible text.

    Open

Archived documents

Callsun Intelligent Solar Battery Trickle Maintainer User Manual V1.0.0

Archived copy of a document published by Callsun. Copyright retained by the publisher; kept for reference and verification only, no endorsement implied. To ask for its removal, email legal@chargedreviews.com.

Archived backup V1.0.0 · 0.91 MB

Archived copy, unaltered, kept as a record of what Callsun published. Original address: https://cdn.shopify.com/s/files/1/0651/5965/9688/files/CS-7.5w15w20w30w_Intelligent_Solar_Battery_Trickle_Maintainer_User_Manual-V1.0.0.pdf?v=1787623399. Copyright and takedown

Source first found
This copy captured
Archived
File detailsOriginal source
Pages
10
Embedded creation date
Embedded modification date

Embedded dates are file metadata, not independent proof of publication.

SHA-256: c1c671e15d105f00940d8b610b797fd51b1e26093f90a93a7b109d35fa0d799d

Submit a document

Warranty

Product warranty
1 year
Converted: 365 days = 1 year
Official product page
Sources

Converted: 365 days = 1 year

Printed as "365-day warranty" in the page's feature list, recorded as one year; the page does not say what the warranty covers or who may claim it. Callsun's 15W 12V Solar Battery Maintainer & Trickle Charger product page, captured on September 25, 2026.

Official product page: Callsun 15W 12V Solar Battery Maintainer & Trickle Charger product page Checked · Earlier document

Location: Product feature list

Converted

Sellers

No sellers found.

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Price history

No seller price history.

Owner reviews

No reviews yet

Own one? A verified review needs a receipt and a serial number photo, and counts 19× in the owner rating.

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Your reviews · Review policy

Evidence score

3/10026% documented

The Evidence score uses the priorities you choose. It counts published documents, such as certificates and warranty terms, and it compares a documented figure with the best documented figure of the same kind. It does not count owner reviews, and it is not a verdict on product quality or on how many people have reviewed it. A low score can mean little is documented, or that a documented figure is below the best of its kind. Undisclosed data scores 0.

Missing for this product: Module efficiency needed; Power warranty needed; Power temperature coefficient needed; First-year degradation needed.

Each input is scored against the best documented value for a solar panel, and weight per watt against the best in the panel’s own format. A documented value always earns points; an undisclosed one earns 0 and is listed as missing. Certificates and unsupported claims do not add points.

Product warranty1 year0.7 / 21.0

1 of 30 years, the best documented for a solar panel (printed by the maker): AIKO Neostar 3S+54 AIKO-A480-MCE54Db 480W Dual-Glass Module

Printed as "365-day warranty" in the page's feature list, recorded as one year; the page does not say what the warranty covers or who may claim it. Callsun's 15W 12V Solar Battery Maintainer & Trickle Charger product page, captured on September 25, 2026.

Official product page: Callsun 15W 12V Solar Battery Maintainer & Trickle Charger product page Checked · Earlier document
Weight / watt1.7 kg / 15 W1.9 / 5.0

0.1133 against 0.04308 kg per W, the lowest documented for a rigid solar panel (calculated from maker figures): EcoFlow 130W RVMax Rigid Solar Panel

1.7 kg / 15 W. Lighter modules per watt carry less roof load.

Official product page: Callsun 15W 12V Solar Battery Maintainer & Trickle Charger product page Checked · Earlier documentOfficial user manual: Callsun Intelligent Solar Battery Trickle Maintainer User Manual V1.0.0 Rev V1.0.0 · Checked · Earlier document

Not documented, 0 points: Module efficiency, Power warranty, Power temperature coefficient, First-year degradation.

Each input is compared with the best documented value among published solar panels, weight per watt within the same panel format · Method version 0.4

How it works

Certificates

No certificates on file. Certificate guide

Parts and accessories

No sourced accessories or replacement parts listed yet.

Model history

Model identity

Model
CS15W-G1V1-US

Manufacturer SKU CS15W-G1V1-US · US market

No historical observations recorded yet.

Community discussions

No discussions linked yet. Search DIY Solar Forum

Recalls / legal notices

No recalls or legal notices on file; this is not a complete recall or court search. All notices · Report a notice

Callsun logo
CallsunProducts, reviews and history
5.0 (1)

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Prices · price basis. * Calculated; estimates labeled. Value needs confirmation; select it for the reason.