Upgrading your RV to lithium batteries requires a compatible converter charger that can handle the unique charging profile of LiFePO4 chemistry. We researched and compared the top models on Amazon using manufacturer specifications, published industry standards, and aggregated owner feedback. Our evaluation focuses on charging performance, safety features, durability, and ease of use. Here are our picks for the best RV converter chargers for lithium batteries.
| Photo | Product | Score | Buy |
|---|---|---|---|
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Progressive Dynamics PD9160ALV Best Overall 60A output, LiFePO4 profile, Charge Wizard |
9.0 | 🛒 Check Price |
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Victron Energy Orion-Tr Smart 12/12-30 Best Smart Charger 30A DC-DC charger, Bluetooth, programmable |
8.7 | 🛒 Check Price |
 |
WFCO WF-9855-AD Best Value 55A output, auto-detect lithium, 3-stage |
8.4 | 🛒 Check Price |
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Progressive Dynamics PD9245CV High Amp Option 45A output, constant voltage, lithium compatible |
8.1 | 🛒 Check Price |
 |
NOCO Genius GENPRO10X3 Compact Portable 10A per bank, 3 banks, lithium mode |
7.8 | 🛒 Check Price |
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Battery Tender 022-0185 Budget Pick 15A output, lithium compatible, automatic |
7.3 | 🛒 Check Price |
 |
Renogy 20A DC-DC MPPT Solar Combo 20A DC-DC, MPPT solar input, lithium profile |
7.8 | 🛒 Check Price |
1. Progressive Dynamics PD9160ALV: Best Overall
The Progressive Dynamics PD9160ALV is a top choice for RV owners switching to lithium. In our evaluation, its 60-amp output efficiently charges large battery banks, and the automatic lithium detection sets the correct absorption voltage (14.4V) and float (13.6V) without manual adjustment. Owner feedback highlights its sturdy build and the Charge Wizard feature that extends battery life. However, the cooling fan is audible under load, which may be a concern for quiet campers.
This charger is ideal for those who want a plug-and-play upgrade. If you prefer a silent operation or need a higher amperage for massive battery banks, consider the Progressive Dynamics PD9245CV or a separate charger. But for most RVers, this model delivers excellent performance and reliability.
- Automatic lithium detection and charging profile
- Built-in Charge Wizard for maintenance
- Reverse battery protection and thermal shutdown
Pros: True lithium charge profile; Reliable and durable construction
Cons: Fan noise can be noticeable
2. Victron Energy Orion-Tr Smart 12/12-30: Best Smart Charger
The Victron Energy Orion-Tr Smart is a sophisticated DC-DC charger designed for lithium batteries. It offers Bluetooth connectivity for real-time monitoring and customizable charging parameters. In our comparison, its three-stage charging (bulk, absorption, float) with a dedicated lithium preset ensures optimal charging. The unit is rugged with IP43 rating, making it suitable for under-hood installation. However, it is not a traditional AC-to-DC converter; it requires an existing DC source like an alternator.
This charger is perfect for those who want advanced control and monitoring. If you need a full AC-to-DC converter for shore power, look at the Progressive Dynamics or WFCO models. The Orion-Tr is a premium choice for charging lithium from a vehicle alternator, but its price and complexity may deter budget-conscious buyers.
- Bluetooth monitoring and programming via app
- Three-stage charging with lithium preset
- IP43 protection, suitable for engine bay
Pros: Highly programmable; Excellent build quality
Cons: DC-DC only, not a converter
3. WFCO WF-9855-AD: Best Value
The WFCO WF-9855-AD is a budget-friendly converter charger that automatically detects lithium batteries and adjusts its charging profile accordingly. We found its 55-amp output sufficient for most mid-size RVs, and the three-stage charging (bulk, absorption, float) works well with LiFePO4. Owner reviews praise its straightforward installation and reliable performance. However, it lacks manual adjustments or a remote display, which may frustrate advanced users.
This charger is a solid choice for RVers on a budget who want a simple upgrade. If you need programmable settings or higher amperage, consider the Progressive Dynamics PD9160ALV. But for the price, the WF-9855-AD offers great value and reliable lithium charging.
- Auto-detect lithium and lead-acid
- Compact design, easy retrofit
- Built-in reverse polarity protection
Pros: Affordable lithium compatibility; Simple installation
Cons: No user-adjustable settings
4. Progressive Dynamics PD9245CV: High Amp Option
The Progressive Dynamics PD9245CV is a constant voltage charger designed specifically for lithium batteries, delivering a steady 14.6V. In our research, this model excels at quickly charging large battery banks, and its 45-amp output is ideal for medium to large RVs. The unit is built to last with a durable aluminum case and thermal management. However, it lacks multi-stage charging (no float mode), which can lead to overcharging if left connected indefinitely. Owner feedback notes that the fan is loud under full load.
This charger is best for those who need fast charging and can monitor the battery manually. If you prefer a set-and-forget solution with float maintenance, look at the PD9160ALV. The PD9245CV is a powerful tool but requires user attention.
- Constant voltage 14.6V for lithium
- Compact size, easy mount
- Built-in cooling fan with thermostat
Pros: High voltage for fast charging; Rugged build
Cons: No multi-stage charging; Fan can be loud
5. NOCO Genius GENPRO10X3: Compact Portable
The NOCO Genius GENPRO10X3 is a portable 3-bank charger that can handle lithium batteries with a dedicated mode. It delivers 10 amps per bank, making it suitable for maintaining or charging smaller battery banks. We appreciate its safety features: reverse polarity protection, spark-proof technology, and waterproof housing. However, it is not a permanent RV converter; it is best used as a maintenance charger or for separate battery banks. Owner feedback is positive for its ease of use and reliability.
This charger is ideal for RVers with multiple battery banks or those who need a portable solution. If you need a high-amp built-in converter, look at the PD9160ALV. The GENPRO10X3 is a great accessory but not a primary converter.
- 3-bank charging for multiple batteries
- Lithium and lead-acid modes
- Waterproof and spark-proof
Pros: All-around multi-bank charging; Portable and safe
Cons: Low amperage for large banks; Not a built-in converter
6. Battery Tender 022-0185: Budget Pick
The Battery Tender 022-0185 is an entry-level charger that supports lithium batteries with a selectable mode. It provides 15 amps, which is fine for small battery banks or maintenance, but too slow for large RV batteries. In our evaluation, its build quality is decent for the price, but it lacks advanced features like multi-stage charging or remote monitoring. Owner reviews mention it works well for small batteries but struggles with larger ones.
This charger is best for RVers with small lithium batteries or as a backup. If you need a full-time converter for a large system, invest in the WFCO or Progressive Dynamics models. The Battery Tender is a budget option that gets the job done for light use.
- Automatic charging with lithium mode
- Compact and lightweight
- Reverse polarity protection
Pros: Very affordable; Simple operation
Cons: Low amperage, slow charging; No mounting hardware
7. Renogy 20A DC-DC MPPT: Solar Combo
The Renogy 20A DC-DC MPPT is a multi-purpose charger that can accept both alternator and solar input, making it ideal for off-grid setups. It has a dedicated lithium charging profile and MPPT technology for solar panels. We found its build quality acceptable, but installation is more complex than a simple converter. Owner feedback highlights its efficiency and dual-source capability, but some users report difficulty with programming. It is not a standalone AC converter.
This charger is perfect for RVers who want to charge lithium from both alternator and solar. If you need an AC shore power converter, choose a different model. The Renogy is a specialized tool for those with solar systems.
- Combines DC-DC and MPPT solar charger
- Programmable lithium profile
- Bluetooth monitoring optional
Pros: Dual function (alternator + solar); Good efficiency
Cons: Complex installation; No AC input
Frequently Asked Questions
Can I use a lead-acid converter charger on lithium batteries?
It is not recommended. Lead-acid chargers typically have a higher absorption voltage and may overcharge lithium batteries, causing damage or safety risks. Lithium batteries require a specific charging profile with a lower absorption voltage (around 14.4V) and a float voltage around 13.6V. Some modern chargers have auto-detect features, but it is safest to use a charger explicitly designed for lithium.
What amperage converter charger do I need for my RV lithium batteries?
The amperage depends on your battery capacity and charging needs. A general rule is to charge at 0.2C to 0.5C (20% to 50% of battery capacity in Ah). For a 100Ah battery, a 20A to 50A charger is appropriate. For larger banks, higher amperage reduces charging time. Ensure your RV’s electrical system and wiring can handle the charger’s output.
Do I need a special converter charger for lithium batteries?
Yes, you need a converter charger that supports lithium (LiFePO4) chemistry. Lithium batteries have different voltage requirements and charging characteristics than lead-acid. A compatible charger will have a lithium profile that sets the correct absorption and float voltages. Using an incompatible charger can reduce battery life or cause safety issues.
Can I install a lithium converter charger myself?
Many RV owners can install a converter charger themselves if they have basic electrical knowledge. The process typically involves disconnecting the old converter, mounting the new one, and connecting AC input and DC output. Always follow the manufacturer’s instructions and safety precautions. If you are unsure, hire a certified RV technician.
What safety features should I look for in a lithium converter charger?
Look for reverse polarity protection, over-temperature protection, over-voltage protection, and short-circuit protection. Some chargers also have spark-proof technology and thermal management. Safety certifications like UL or ETL are important. For lithium, a charger with a dedicated lithium profile prevents overcharging, which is a key safety feature.
Our Verdict
After researching and comparing the top models, the Progressive Dynamics PD9160ALV stands out as the best overall RV converter charger for lithium batteries due to its automatic lithium detection, reliable performance, and strong safety features. For those who want advanced monitoring and control, the Victron Energy Orion-Tr Smart is an excellent runner-up, especially for alternator charging. Choose based on your specific needs: amperage, budget, and installation requirements.
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