RICH SOLAR
RICH SOLAR 12V 20A DC-DC Battery Charger for RV, Van, Boat, Off-Grid Lithium & Lead-Acid Batteries
RICH SOLAR 12V 20A DC-DC Battery Charger for RV, Van, Boat, Off-Grid Lithium & Lead-Acid Batteries
SKU: RS-DC20
- Regular price
- $119.99
- Regular price
- Sale price
- $119.99
- Unit price
- per
Couldn't load pickup availability
In stock — available to order
- Free standard shipping on eligible Lower-48 orders. See shipping details
- 30-day return requests for eligible items after delivery. Review the return policy
- Price Match Guarantee for qualifying identical offers. Check eligibility
- Warranty information is listed in this product's details.
Alternator-aware charging for a 12V auxiliary battery
Charge a 12V house battery at up to 20A—or select 10A low-current mode.
The RICH SOLAR RS-DC20 is a 12V-to-12V DC-DC charger for RVs, vans, boats and work vehicles. It regulates alternator power for lithium and lead-acid auxiliary batteries, with a 10A low-current mode for systems that need a gentler load on the source.
At a glance
The current and voltage limits that define fit
The published input-current limit is 34A. Confirm alternator capacity, starter-battery behavior, cable loss and the auxiliary battery's charge-current limit before selecting conductors and protection.
System fit
Plan the two batteries, alternator and cable run as one circuit.
Allow for the 8.4 × 7.4 × 3.1 in enclosure and 4.0 lb weight in a protected, ventilated location. Size input and output conductors from maximum current, run length, voltage drop, terminal capacity and local requirements.
In the box
What this RS-DC20 listing covers
- 1 × RICH SOLAR RS-DC20 20A DC-DC battery charger
D+ wire, low-current control wire, temperature sensor, battery cables, lugs, fuses or breakers, disconnects and installation labor are not listed as included.
Product confidence
Use the current charger and vehicle manuals together
Installation, battery settings, alternator integration, environmental limits and warranty remedies follow the current written RICH SOLAR instructions and policy.
Common questions
RS-DC20 installation questions
Will it charge LiFePO4 batteries?
Yes, a lithium profile is listed. Confirm the exact battery's required charge voltage, temperature rules and maximum charge current before selecting it.
Why use 10A low-current mode?
It reduces charging demand on the alternator and wiring when the source or battery should not support the full 20A setting.
Does it work with a 24V alternator or battery?
No. This model is published for 12V input and a 12V auxiliary battery.
Is the temperature sensor used with lithium?
RICH SOLAR identifies the RJ11 temperature sensor function for temperature compensation and notes it is not for lithium batteries. Follow the battery-specific charging instructions.
Product Data
Technical Specifications
| Output Nominal Power | 250W |
|---|---|
| Output Nominal Current | 20A |
| Operating Current Range | 18~22A |
| Low Current Mode | 10A |
| Floating Charge Current | 3~5A |
| Low Current Mode Current Range | 8~11A |
| Quiescent Current | ＜0.45A |
| Ripple Voltage | ＜500mV rms |
| Battery Charging Mode | 2-stage for lithium; 3-stage for lead-acid |
| Efficiency | >85%, @14VDC 30% load |
| Input Nominal Voltage | 12VDC |
| Operating Voltage Range | 10~16VDC |
| Input Current Limit | ≤34A |
| Dimensions | 8.4*7.4*3.1 in |
| Weight | 4.0 lb |
Available configurations
| Option | SKU |
|---|---|
| Single configuration | RS-DC20 |
Manufacturer Documentation
Official Manuals, Specifications & Certifications
Use these current RICH SOLAR documents for installation, compatibility, limits, and revision-specific details. The delivered product label and its exact manual are the controlling sources.
Review the current manufacturer manual for your exact model before installation or use.
Why Buy From Us
Shop with confidence at Torven Power.
Clear policies and real support before and after your purchase.
Ordering Information
Shipping & Returns
Shipping: Shipping method, availability, and delivery timing are confirmed during order review. Batteries, panel pallets, and large kits may require freight delivery, an appointment, or receiving coordination.
Returns: Eligibility, timing, product-condition, freight, and restocking terms vary by item. Review the current Shipping Policy and Return & Refund Policy before ordering.
RICH SOLAR
RICH SOLAR 12V 20A DC-DC Battery Charger for RV, Van, Boat, Off-Grid Lithium & Lead-Acid Batteries
Torven Power Planner
Not sure this product fits your setup?
Build a personalized power plan before you order. We’ll estimate the capacity, output, voltage, runtime, and solar input your setup needs—then connect you with real products from our catalog.
- Tell us what you need to power.
- Set your runtime and solar goals.
- Review products matched to your answers.
Planner results are estimates. Confirm product compatibility and installation requirements before purchase.