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RICH SOLAR RS-DC40 12V 40A DC-DC Battery Charger

Model: RS-DC40 · SKU: RS-DC40

Prepared Nov 12, 2026

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Common specifications

Charger input	DC (alternator or battery)Source [2]
Input voltage	10~16VDCSource [1, 2]
Solar input voltage	Not documented
Solar input limit	Not documented
Output voltage	Not documented
Battery voltage	12 VSource [1, 2]
Charge current	40 ASource [1, 2]
Battery chemistry	AGM, Flooded, Gel, Sealed, LiFePO₄ (LFP), Lithium-ionSource [2]
Power	500 WSource [1, 2]
Isolated	Not documented
Engine detection	D+ Ignition TerminalSource [1]
Weight	2.22 kg4.89 lb convertedCalculatedSource [2]
Enclosure volume	Not documented
Warranty term	Not documented

All recorded specifications

Battery chemistry	AGM, Flooded, Gel, Sealed, LiFePO₄ (LFP), Lithium-ionDocumented claim Conditions The data sheet prints "Compatible Battery Types AGM, Flooded, Gel, Sealed, LiFePO₄ (LFP), Lithium-ion" for all three models. Location: PDF page 2, Specification, Compatible Battery Types The data sheet prints "Compatible Battery Types AGM, Flooded, Gel, Sealed, LiFePO₄ (LFP), Lithium-ion" for all three models. Location: PDF page 2, Specification, Compatible Battery Types Official datasheet · RICH SOLAR DC-DC 20A / 40A / 60A Battery Charger data sheet (PDF, 2026) [2]
Battery fuse or breaker (manual)	Recommended Fuse 60A (DC input, starter) and 50A (DC output, house)Documented claim Conditions Printed as "60A 50A" in RICH SOLAR's RICH SOLAR DC 12V - DC 12V Battery Charger User Manual (PDF page 9). The manual applies to this model: Manual cover prints "MODEL: RS-DC20 / RS-DC40 / RS-DC60"; its fuse table has a row per model. Location: PDF page 9 Printed as "60A 50A" in RICH SOLAR's RICH SOLAR DC 12V - DC 12V Battery Charger User Manual (PDF page 9). The manual applies to this model: Manual cover prints "MODEL: RS-DC20 / RS-DC40 / RS-DC60"; its fuse table has a row per model. Location: PDF page 9 Official instruction manual · RICH SOLAR: RICH SOLAR DC 12V - DC 12V Battery Charger User Manual [4]
Battery voltage	12 VDocumented claim Conditions The manual prints "Input nominal voltage 12VDC" for all three models and its cover reads "DC 12V - DC 12V BATTERY CHARGER"; the data sheet prints "System Voltage 12VDC". Location: PDF page 22 (printed page 20), Technical Specifications, Input nominal voltage The manual prints "Input nominal voltage 12VDC" for all three models and its cover reads "DC 12V - DC 12V BATTERY CHARGER"; the data sheet prints "System Voltage 12VDC". Location: PDF page 22 (printed page 20), Technical Specifications, Input nominal voltage Official user manual · RICH SOLAR DC 12V to DC 12V Battery Charger user manual, models RS-DC20, RS-DC40 and RS-DC60 (PDF, file dated 251022)Official datasheet · RICH SOLAR DC-DC 20A / 40A / 60A Battery Charger data sheet (PDF, 2026) [1, 2]
Charge current	40 ADocumented claim Conditions The manual prints "Output nominal current 40A" in the RS-DC40 column; the data sheet prints "Rated Charge Current 40A" (read from the rendered PDF page 2). Location: PDF page 22 (printed page 20), Technical Specifications, Output nominal current The manual prints "Output nominal current 40A" in the RS-DC40 column; the data sheet prints "Rated Charge Current 40A" (read from the rendered PDF page 2). Location: PDF page 22 (printed page 20), Technical Specifications, Output nominal current Official user manual · RICH SOLAR DC 12V to DC 12V Battery Charger user manual, models RS-DC20, RS-DC40 and RS-DC60 (PDF, file dated 251022)Official datasheet · RICH SOLAR DC-DC 20A / 40A / 60A Battery Charger data sheet (PDF, 2026) [1, 2]
Charger input	DC (alternator or battery)Documented claim Conditions Printed as "Compatible with conventional and smart alternators."; the datasheet covers RS-DC20, RS-DC40 and RS-DC60 together and prints no solar input. Location: PDF page 1, Smart Alternator Integration & Starter Battery Protection Printed as "Compatible with conventional and smart alternators."; the datasheet covers RS-DC20, RS-DC40 and RS-DC60 together and prints no solar input. Location: PDF page 1, Smart Alternator Integration & Starter Battery Protection Official datasheet · RICH SOLAR DC-DC 20A / 40A / 60A Battery Charger data sheet (PDF, 2026) [2]
Dimensions	263.0 x 188.0 x 79.0 mmDocumented claim Conditions The manual's RS-DC40 dimension drawing prints 263.0, 188.0, 79.0 mm (length, height, depth; read from the rendered PDF page 7) with the note "The dimensions have a ±0.5mm tolerance." The data sheet prints "10.3 × 7.4 × 3.1 in", the same size in inches within rounding. Location: PDF page 7 (printed page 5), Dimensions drawing The manual's RS-DC40 dimension drawing prints 263.0, 188.0, 79.0 mm (length, height, depth; read from the rendered PDF page 7) with the note "The dimensions have a ±0.5mm tolerance." The data sheet prints "10.3 × 7.4 × 3.1 in", the same size in inches within rounding. Location: PDF page 7 (printed page 5), Dimensions drawing Official user manual · RICH SOLAR DC 12V to DC 12V Battery Charger user manual, models RS-DC20, RS-DC40 and RS-DC60 (PDF, file dated 251022) [1]
Efficiency	>85%, @ 14VDC, 30% loadDocumented claim Conditions The manual prints "Efficiency >85%, @ 14VDC, 30% load"; the data sheet prints ">85% (@ 14VDC, 30% Load)". A lower bound at one stated load, not a measured value. Location: PDF page 22 (printed page 20), Technical Specifications, Efficiency The manual prints "Efficiency >85%, @ 14VDC, 30% load"; the data sheet prints ">85% (@ 14VDC, 30% Load)". A lower bound at one stated load, not a measured value. Location: PDF page 22 (printed page 20), Technical Specifications, Efficiency Official user manual · RICH SOLAR DC 12V to DC 12V Battery Charger user manual, models RS-DC20, RS-DC40 and RS-DC60 (PDF, file dated 251022)Official datasheet · RICH SOLAR DC-DC 20A / 40A / 60A Battery Charger data sheet (PDF, 2026) [1, 2]
Engine detection	D+ Ignition TerminalDocumented claim Conditions Printed as "4. D+ Ignition Terminal."; the datasheet adds "Operates only when the engine is running via the D+ ignition signal"; series-wide. Location: PDF page 6, product overview (part 4) Printed as "4. D+ Ignition Terminal."; the datasheet adds "Operates only when the engine is running via the D+ ignition signal"; series-wide. Location: PDF page 6, product overview (part 4) Official user manual · RICH SOLAR DC 12V to DC 12V Battery Charger user manual, models RS-DC20, RS-DC40 and RS-DC60 (PDF, file dated 251022) [1]
Grounding (manual)	common negative ground; the body of the DC-DC is not groundedDocumented claim Conditions Printed as "You will not ground the body of the DC-DC." in RICH SOLAR's RICH SOLAR DC 12V - DC 12V Battery Charger User Manual (PDF page 9). The manual applies to this model: Manual cover prints "MODEL: RS-DC20 / RS-DC40 / RS-DC60"; its fuse table has a row per model. Location: PDF page 9 Printed as "You will not ground the body of the DC-DC." in RICH SOLAR's RICH SOLAR DC 12V - DC 12V Battery Charger User Manual (PDF page 9). The manual applies to this model: Manual cover prints "MODEL: RS-DC20 / RS-DC40 / RS-DC60"; its fuse table has a row per model. Location: PDF page 9 Official instruction manual · RICH SOLAR: RICH SOLAR DC 12V - DC 12V Battery Charger User Manual [4]
Input voltage	10~16VDCDocumented claim Conditions The manual prints "Operating voltage range 10~16VDC" for all three models; the data sheet prints "Input Voltage Range 10-16VDC". Location: PDF page 22 (printed page 20), Technical Specifications, Operating voltage range The manual prints "Operating voltage range 10~16VDC" for all three models; the data sheet prints "Input Voltage Range 10-16VDC". Location: PDF page 22 (printed page 20), Technical Specifications, Operating voltage range Official user manual · RICH SOLAR DC 12V to DC 12V Battery Charger user manual, models RS-DC20, RS-DC40 and RS-DC60 (PDF, file dated 251022)Official datasheet · RICH SOLAR DC-DC 20A / 40A / 60A Battery Charger data sheet (PDF, 2026) [1, 2]
Installation clearances (manual)	at least 5cm/1.97″ of clearance on all sidesDocumented claim Conditions Printed as "Have at least 5cm/1.97″ of clearance on all sides and ensure some ventilation for best performance." in RICH SOLAR's RICH SOLAR DC 12V - DC 12V Battery Charger User Manual (PDF page 8). The manual applies to this model: Manual cover prints "MODEL: RS-DC20 / RS-DC40 / RS-DC60"; its fuse table has a row per model. Location: PDF page 8 Printed as "Have at least 5cm/1.97″ of clearance on all sides and ensure some ventilation for best performance." in RICH SOLAR's RICH SOLAR DC 12V - DC 12V Battery Charger User Manual (PDF page 8). The manual applies to this model: Manual cover prints "MODEL: RS-DC20 / RS-DC40 / RS-DC60"; its fuse table has a row per model. Location: PDF page 8 Official instruction manual · RICH SOLAR: RICH SOLAR DC 12V - DC 12V Battery Charger User Manual [4]
Operating temperature	-20 to 50 °C-4 to 122 °F convertedCalculated-4 °F to 122 °F as printed(-4 °F - 32) x 5/9 = -20 °C; (122 °F - 32) x 5/9 = 50 °C Conditions The data sheet prints "Operating Temperature -4 °F to 122 °F" for all three models; the manual prints no operating temperature for the charger. Location: PDF page 2, Specification, Operating Temperature The data sheet prints "Operating Temperature -4 °F to 122 °F" for all three models; the manual prints no operating temperature for the charger. Location: PDF page 2, Specification, Operating Temperature Official datasheet · RICH SOLAR DC-DC 20A / 40A / 60A Battery Charger data sheet (PDF, 2026) [2]
Power	500 WDocumented claim Conditions The manual prints "Output nominal power 500W" in the RS-DC40 column; the data sheet prints "Output Power 500W". Location: PDF page 22 (printed page 20), Technical Specifications, Output nominal power The manual prints "Output nominal power 500W" in the RS-DC40 column; the data sheet prints "Output Power 500W". Location: PDF page 22 (printed page 20), Technical Specifications, Output nominal power Official user manual · RICH SOLAR DC 12V to DC 12V Battery Charger user manual, models RS-DC20, RS-DC40 and RS-DC60 (PDF, file dated 251022)Official datasheet · RICH SOLAR DC-DC 20A / 40A / 60A Battery Charger data sheet (PDF, 2026) [1, 2]
Weight	2.22 kg4.89 lb convertedCalculated4.9 lb x 0.45359237 kg/lb, rounded to 0.01 kg Conditions The data sheet prints "Net Weight 4.9 lb" in the RS-DC40 column (read from the rendered PDF page 2); the manual prints no weight. Location: PDF page 2, Specification, Net Weight The data sheet prints "Net Weight 4.9 lb" in the RS-DC40 column (read from the rendered PDF page 2); the manual prints no weight. Location: PDF page 2, Specification, Net Weight Official datasheet · RICH SOLAR DC-DC 20A / 40A / 60A Battery Charger data sheet (PDF, 2026) [2]

Warranty

Certificate records

No records documented.

Sources and revisions

RICH SOLAR DC 12V to DC 12V Battery Charger user manual, models RS-DC20, RS-DC40 and RS-DC60 (PDF, file dated 251022)Official user manual · Revision 251022 · Checked Oct 9, 2026https://cdn.shopify.com/s/files/1/0058/2769/0553/files/RS-DC20_DC40_DC60_User_Manual_251022.pdf?v=1761284369
RICH SOLAR DC-DC 20A / 40A / 60A Battery Charger data sheet (PDF, 2026)Official datasheet · Checked Oct 9, 2026https://cdn.shopify.com/s/files/1/0058/2769/0553/files/DC_20_40_60_BATTERY_CHARGER.pdf?v=1767942118
12V 40A DC-DC Battery Charger for RVs, Vans, Boats & Off-Grid Systems, RICH SOLAR store page (October 9, 2026 capture)Paid link.Official product page · Checked Oct 9, 2026https://richsolar.com/products/12v-40a-dc-to-dc-battery-charger
RICH SOLAR: RICH SOLAR DC 12V - DC 12V Battery Charger User ManualOfficial instruction manual · Checked Oct 16, 2026https://cdn.shopify.com/s/files/1/0058/2769/0553/files/RS-DC20_DC40_DC60_User_Manual_251022.pdf?v=1761284369