Manufacturer and seller images. Configuration examples may include additional equipment.
Image source: Power Queen 12V 40A DC to DC Battery Charger, manufacturer product photograph published by Power Queen on its US store (September 24, 2026 capture)Power Queen prints the part number "P12V40A-DC-Z" against the single-unit variant of "Power Queen 12V 40A DC to DC Battery Charger" in its own US storefront product feed, captured on September 24, 2026.
Official store listing: Power Queen store Checked · Earlier documentLocation: Storefront product feed, products[].variants[].sku for https://ipowerqueen.com/products/power-queen-12v-40a-dc-to-dc-battery-charger, variant "Default Title"
Documented
Converted: 4.85 lb x 0.45359237 = 2.2 kg, rounded to 2.2 kg
Printed as "Approx. Weight： 4.85 lbs" in Power Queen 12V 40A DC to DC Battery Charger, Power Queen US product page (September 24, 2026 capture), Product page, Specs table, DIMENSIONS section, "Approx. Weight" row. Revised on 1 October 2026: Power Queen's product page prints this figure in another unit for this model, and the stored value is a direct unit conversion of that printed figure.
Official product page: Power Queen 12V 40A DC to DC Battery Charger, Power Queen US product page (September 24, 2026 capture) Checked · Earlier documentLocation: Product page, Specs table, DIMENSIONS section, "Approx. Weight" row
Converted
Printed as "Solar Charging Mode" with the value line "MPPT" directly below it (OCR lines), beside "Alternator (/Starter Battery)" input rows; single-model manual.
Official user manual: Power Queen 12V 40A DC-DC user manual (PDF, September 24, 2026 capture) Checked · Earlier documentLocation: PDF page 14, Specifications (General)
Documented
Converted: 11.65 x 8.46 x 3.35 in x 25.4 mm/in, rounded to 0.1 mm
Printed as "Size： 11.65 *8.46 * 3.35 in" on Power Queen's own product page, captured on September 24, 2026. Converted from the inches printed, at 1 in = 25.4 mm.
Official product page: Power Queen 12V 40A DC to DC Battery Charger, Power Queen US product page (September 24, 2026 capture) Checked · Earlier documentLocation: Product page, Specs table, DIMENSIONS section, "Size" row
Calculated
Printed as "Max. Solar Input Power" with the value line "600W" directly below it (OCR lines); single-model manual.
Official user manual: Power Queen 12V 40A DC-DC user manual (PDF, September 24, 2026 capture) Checked · Earlier documentLocation: PDF page 14, Specifications (General)
Documented
Printed as "Charging Current： 40A" on Power Queen's own product page, captured on September 24, 2026.
Official product page: Power Queen 12V 40A DC to DC Battery Charger, Power Queen US product page (September 24, 2026 capture) Checked · Earlier documentLocation: Product page, Specs table, BASIC section, "Charging Current" row
Documented
Printed as "Charging Voltage Range： 14.6V (Lithium); 14.4V to 14.8V (Lead Acid)" on Power Queen's own product page, captured on September 24, 2026. The lithium figure; the lead-acid range is printed beside it.
Official product page: Power Queen 12V 40A DC to DC Battery Charger, Power Queen US product page (September 24, 2026 capture) Checked · Earlier documentLocation: Product page, Specs table, BASIC section, "Charging Voltage Range" row
Documented
Printed as "Connect the ACC Wire with the Alternator (Optional for Smart Alternator)"; the ACC wire goes to a switching ignition source, needed for smart alternators only.
Official user manual: Power Queen 12V 40A DC-DC user manual (PDF, September 24, 2026 capture) Checked · Earlier documentLocation: PDF page 12, Installation (ACC wire step)
Documented
Printed as "System Nominal Voltage： 12V" on Power Queen's own product page, captured on September 24, 2026.
Official product page: Power Queen 12V 40A DC to DC Battery Charger, Power Queen US product page (September 24, 2026 capture) Checked · Earlier documentLocation: Product page, Specs table, BASIC section, "System Nominal Voltage" row
Documented
Converted: 4.85 lb x 0.45359237 = 2.2 kg, rounded to 2.2 kg
Printed as "Approx. Weight： 4.85 lbs" in Power Queen 12V 40A DC to DC Battery Charger, Power Queen US product page (September 24, 2026 capture), Product page, Specs table, DIMENSIONS section, "Approx. Weight" row. Revised on 1 October 2026: Power Queen's product page prints this figure in another unit for this model, and the stored value is a direct unit conversion of that printed figure.
Official product page: Power Queen 12V 40A DC to DC Battery Charger, Power Queen US product page (September 24, 2026 capture) Checked · Earlier documentLocation: Product page, Specs table, DIMENSIONS section, "Approx. Weight" row
Converted
Printed as "Solar Charging Mode" with the value line "MPPT" directly below it (OCR lines), beside "Alternator (/Starter Battery)" input rows; single-model manual.
Official user manual: Power Queen 12V 40A DC-DC user manual (PDF, September 24, 2026 capture) Checked · Earlier documentLocation: PDF page 14, Specifications (General)
Documented
Converted: 11.65 x 8.46 x 3.35 in x 25.4 mm/in, rounded to 0.1 mm
Printed as "Size： 11.65 *8.46 * 3.35 in" on Power Queen's own product page, captured on September 24, 2026. Converted from the inches printed, at 1 in = 25.4 mm.
Official product page: Power Queen 12V 40A DC to DC Battery Charger, Power Queen US product page (September 24, 2026 capture) Checked · Earlier documentLocation: Product page, Specs table, DIMENSIONS section, "Size" row
Converted
Printed as "Max. Solar Input Power" with the value line "600W" directly below it (OCR lines); single-model manual.
Official user manual: Power Queen 12V 40A DC-DC user manual (PDF, September 24, 2026 capture) Checked · Earlier documentLocation: PDF page 14, Specifications (General)
Documented
Printed as "Charging Current： 40A" on Power Queen's own product page, captured on September 24, 2026.
Official product page: Power Queen 12V 40A DC to DC Battery Charger, Power Queen US product page (September 24, 2026 capture) Checked · Earlier documentLocation: Product page, Specs table, BASIC section, "Charging Current" row
Documented
Printed as "Charging Voltage Range： 14.6V (Lithium); 14.4V to 14.8V (Lead Acid)" on Power Queen's own product page, captured on September 24, 2026. The lithium figure; the lead-acid range is printed beside it.
Official product page: Power Queen 12V 40A DC to DC Battery Charger, Power Queen US product page (September 24, 2026 capture) Checked · Earlier documentLocation: Product page, Specs table, BASIC section, "Charging Voltage Range" row
Documented
Printed as "Connect the ACC Wire with the Alternator (Optional for Smart Alternator)"; the ACC wire goes to a switching ignition source, needed for smart alternators only.
Official user manual: Power Queen 12V 40A DC-DC user manual (PDF, September 24, 2026 capture) Checked · Earlier documentLocation: PDF page 12, Installation (ACC wire step)
Documented
Printed as "System Nominal Voltage： 12V" on Power Queen's own product page, captured on September 24, 2026.
Official product page: Power Queen 12V 40A DC to DC Battery Charger, Power Queen US product page (September 24, 2026 capture) Checked · Earlier documentLocation: Product page, Specs table, BASIC section, "System Nominal Voltage" row
Documented
Printed as "Max. Alternator Input Power： 680W" on Power Queen's own product page, captured on September 24, 2026.
Official product page: Power Queen 12V 40A DC to DC Battery Charger, Power Queen US product page (September 24, 2026 capture) Checked · Earlier documentLocation: Product page, Specs table, BASIC section, "Max. Alternator Input Power" row
Documented
Printed as "Charging Efficiency： Max.90%" on Power Queen's own product page, captured on September 24, 2026.
Official product page: Power Queen 12V 40A DC to DC Battery Charger, Power Queen US product page (September 24, 2026 capture) Checked · Earlier documentLocation: Product page, Specs table, BASIC section, "Charging Efficiency" row
Documented
Printed as "Min. Solar Input Voltage" / "10V" and "Max. Solar Input Voltage" / "30V" (label and value on separate OCR lines); single-model manual.
Official user manual: Power Queen 12V 40A DC-DC user manual (PDF, September 24, 2026 capture) Checked · Earlier documentLocation: PDF page 14, Specifications (General)
Documented
Printed in the "Battery Type" row of the Specs table on Power Queen's own product page, captured on September 24, 2026.
Official product page: Power Queen 12V 40A DC to DC Battery Charger, Power Queen US product page (September 24, 2026 capture) Checked · Earlier documentLocation: Product page, Specs table, BASIC section, "Battery Type" row
Documented
Converted: (-4°F - 32) x 5/9 = -20°C; (158°F - 32) x 5/9 = 70°C
Printed as "Storage： -4°F to 158°F" in Power Queen 12V 40A DC to DC Battery Charger, Power Queen US product page (September 24, 2026 capture), Product page, Specs table, TEMPERATURE section, "Storage" row. Revised on 1 October 2026: Power Queen's product page prints this figure in another unit for this model, and the stored value is a direct unit conversion of that printed figure.
Official product page: Power Queen 12V 40A DC to DC Battery Charger, Power Queen US product page (September 24, 2026 capture) Checked · Earlier documentLocation: Product page, Specs table, TEMPERATURE section, "Storage" row
Converted
Converted: (14°F - 32) x 5/9 = -10°C; (104°F - 32) x 5/9 = 40°C
Printed as "Operating： 14°F to 104°F" in Power Queen 12V 40A DC to DC Battery Charger, Power Queen US product page (September 24, 2026 capture), Product page, Specs table, TEMPERATURE section, "Operating" row. Revised on 1 October 2026: Power Queen's product page prints this figure in another unit for this model, and the stored value is a direct unit conversion of that printed figure.
Official product page: Power Queen 12V 40A DC to DC Battery Charger, Power Queen US product page (September 24, 2026 capture) Checked · Earlier documentLocation: Product page, Specs table, TEMPERATURE section, "Operating" row
Converted
Published claims and calculations, not independent test results.
Location: Product overview, connection steps and charging modes
Retrieved
The user manual Power Queen links as "12V 40A DC-DC" on its User Manuals page, captured byte for byte on September 24, 2026. Its text is drawn as outlines, so no figure is quoted from it by machine; it is attached as the manufacturer's document for P12V40A-DC-Z.
Archived copy of a document published by Power Queen. Copyright retained by the publisher; kept for reference and verification only, no endorsement implied. To ask for its removal, email legal@chargedreviews.com.
Archived copy, unaltered, kept as a record of what Power Queen published. Original address: https://ipowerqueen.com/cdn/shop/files/12V_40A_DC-DC.pdf?v=1045957857551564742. Copyright and takedown
Embedded dates are file metadata, not independent proof of publication.
SHA-256: f44905a93ca604af6f3c78ae4f0627febef3cd1ff6e4aa4238b3793a6be4e3ae
Location: Warranty Conditions; Warranty Period tables; Replacement & Refund Policy; Exclusions
Retrieved
Power Queen's own Warranty Policy page on its US store, captured byte for byte on September 24, 2026. It sets the warranty period by battery series and accessory type, the claim procedure, the replacement and refund terms and the exclusions. It is the manufacturer's published policy, not a contract reviewed by this site.
Location: Product heading; description; Specs table (pq-product-specification)
Retrieved
Power Queen's own US product page, captured byte for byte on September 24, 2026. It establishes what Power Queen published for P12V40A-DC-Z on that date: the heading, the description and the Specs table where the page has one. Prices and stock on the page are the state of a promotional storefront and are not recorded from it here. A specification quoted from the page is Power Queen's own published figure, not a test result.
Earlier revisions, archived captures and copies published by someone other than the manufacturer. Every one stays reachable.
Location: User manual list, pq-user-manuals-collection__manual_button links
Retrieved
Power Queen's own index of downloadable manuals, captured byte for byte on September 24, 2026. It establishes that Power Queen serves the manuals attached to these records and under which product label; it states no specification itself.
Archived copy of a document published by Power Queen. Copyright retained by the publisher; kept for reference and verification only, no endorsement implied. To ask for its removal, email legal@chargedreviews.com.
Archived copy, unaltered, kept as a record of what Power Queen published. Original address: https://ipowerqueen.com/cdn/shop/files/12V_40A_DC-DC.pdf?v=1045957857551564742. Copyright and takedown
Embedded dates are file metadata, not independent proof of publication.
SHA-256: f44905a93ca604af6f3c78ae4f0627febef3cd1ff6e4aa4238b3793a6be4e3ae
Summarised from Power Queen's Warranty Policy page captured on September 24, 2026, which prints "Powerqueen will provide a replacement for any defective products." After 12 months the exchange is a priority replacement with a "Like New" battery and a refund is reduced by a monthly depreciation of purchase price divided by total warranty months.
Official warranty: Power Queen Warranty Policy (September 24, 2026 capture) Checked · Earlier documentLocation: Warranty Policy page, "Procedures for Warranty Claims" and "Replacement & Refund Policy"
Documented
Printed as "The warranty applies only to the original purchaser. If gifted or resold, warranty claims must be made through the original purchaser with proof of purchase." on Power Queen's Warranty Policy page captured on September 24, 2026.
Official warranty: Power Queen Warranty Policy (September 24, 2026 capture) Checked · Earlier documentLocation: Warranty Policy page, "Warranty Conditions"
Documented
Summarised from the exclusions printed on Power Queen's Warranty Policy page captured on September 24, 2026. Gradual capacity loss is excluded, and no capacity-retention or energy-throughput term is published.
Official warranty: Power Queen Warranty Policy (September 24, 2026 capture) Checked · Earlier documentLocation: Warranty Policy page, "Exclusions" and "Limitation of Liability"
Documented
Printed as "The warranty period begins on the original purchase date." on Power Queen's Warranty Policy page captured on September 24, 2026. The page adds that a battery replaced or repaired under warranty continues under the original period rather than a new one.
Official warranty: Power Queen Warranty Policy (September 24, 2026 capture) Checked · Earlier documentLocation: Warranty Policy page, "Warranty Conditions"
Documented
Power Queen's Warranty Policy page, captured on September 24, 2026, gives 2 years for chargers (AC-DC and DC-DC). The term runs from the original purchase date and covers the original purchaser only.
Official warranty: Power Queen Warranty Policy (September 24, 2026 capture) Checked · Earlier documentLocation: Warranty Policy page, Warranty Period table, Accessories
Documented
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Manufacturer SKU P12V40A-DC-Z · US market
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† Maker's own price, dated on the product, because no seller price is on file. Not a seller price. No buy link.
