Upgrading your RV to lithium batteries requires a compatible converter charger. Standard converters may not charge lithium batteries fully or safely. We researched and compared the top models based on manufacturer specifications, published industry standards, and aggregated owner feedback to help you choose the right one for your RV.
| Photo | Product | Score | Buy |
|---|---|---|---|
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Progressive Dynamics PD9160ALV Top Pick 60A output, lithium charge profile, 4-stage charging |
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 |
9.2 | 🛒 Check Price |
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WFCO WF-9855-AD Best Value 55A output, auto-detect lithium, 3-stage charging |
8.7 | 🛒 Check Price |
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Boondocker 1240L Compact Power 40A output, lithium profile, lightweight |
8.3 | 🛒 Check Price |
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Renogy 20A DC-DC MPPT Best Dual Input 20A DC-DC + MPPT solar, multi-stage |
8.0 | 🛒 Check Price |
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IOTA Engineering DLS-45 Rugged Choice 45A output, IQ4 smart charger, fan-cooled |
7.8 | 🛒 Check Price |
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PowerMax PM3-35 Budget Friendly 35A output, 3-stage, selectable voltage |
7.3 | 🛒 Check Price |
1. Progressive Dynamics PD9160ALV: Top Pick
In our evaluation, the Progressive Dynamics PD9160ALV stands out as a top choice for RV owners switching to lithium. Based on the spec sheet, it offers a dedicated lithium charge profile that delivers the correct absorption voltage (14.4V) and float voltage (13.6V) for LiFePO4 batteries. Owner feedback frequently highlights its consistent charging and robust build quality. The 4-stage charging ensures batteries are charged efficiently without overcharging, and safety features like reverse battery protection add peace of mind.
However, the cooling fan is audible under high load, which may be a concern for noise-sensitive users. This converter is ideal for those who want a dedicated lithium solution and are comfortable with a slightly noisier fan. If you need a completely silent unit, you might consider other models.
- Specifically designed for lithium batteries with a dedicated charge profile
- 4-stage charging: bulk, absorption, float, and equalization (disabled for lithium)
- Built-in reverse battery protection and over-temperature shutdown
Pros: Reliable performance with lithium batteries; Easy installation with clear instructions
Cons: Fan can be noisy under full load
2. Victron Energy Orion-Tr Smart 12/12-30: Best Smart Charger
The Victron Energy Orion-Tr Smart is a DC-DC converter ideal for charging lithium batteries from the alternator. Our research shows it is highly regarded for its smart features: Bluetooth monitoring allows you to track battery status and adjust parameters from your phone. The unit is programmable for any battery type, making it versatile. Owner reviews praise its robust construction and consistent performance even in harsh environments.
The main drawback is its cost, which is higher than simpler converters. It is best suited for RV owners who want full control over their charging system and are willing to invest in premium equipment. If you need a simple plug-and-play converter for shore power, this may not be the right pick.
- Bluetooth connectivity for real-time monitoring and configuration
- Fully programmable charge profile for any battery chemistry
- Built-in safety features: over-voltage, under-voltage, temperature protection
Pros: Highly customizable via smartphone app; Excellent build quality and reliability
Cons: Higher price point than basic converters
3. WFCO WF-9855-AD: Best Value
The WFCO WF-9855-AD is a popular choice among RV owners due to its auto-detect feature that automatically adjusts charging for lithium batteries. Based on owner feedback, it works well for most setups and offers a good value. The 55A output is sufficient for typical RV battery banks, and the 3-stage charging helps maintain battery health. We found the build quality to be solid, though not as robust as higher-end units.
Some users report that the unit can run hot in high-temperature environments, which may reduce longevity. This converter is ideal for budget-conscious RVers who want a reliable lithium-compatible charger without breaking the bank. If you frequently camp in extreme heat, you might need a more rugged option.
- Auto-detect technology recognizes lithium batteries and adjusts charging profile
- 3-stage charging for efficient and safe charging
- Compact design fits in standard RV converter compartments
Pros: Auto-detect simplifies setup; Good balance of features and price
Cons: Not as durable as premium brands in extreme temperatures
4. Boondocker 1240L: Compact Power
The Boondocker 1240L is a compact converter designed for smaller RVs or limited-space installations. Our evaluation of the specs shows it offers a lithium-specific profile and built-in protection features. Owner reviews note it is easy to install and works well with smaller lithium battery banks. The lightweight design is a plus for those concerned about weight.
However, the 40A output is lower than many competitors, making it less suitable for large battery banks or high-demand systems. This converter is best for small RVs, vans, or trailers with modest power needs. If you have a large battery bank, consider a higher-output model.
- Lightweight and compact design for easy installation
- Lithium-specific charging profile with temperature compensation
- Built-in circuit breaker for overcurrent protection
Pros: Small footprint fits tight spaces; Good performance for the size
Cons: Lower output may not suit large battery banks
5. Renogy 20A DC-DC MPPT: Best Dual Input
The Renogy 20A DC-DC MPPT is a versatile unit that combines alternator charging and solar MPPT control in one device. Based on our research, it is a convenient solution for RV owners with solar panels. The multi-stage charging profile supports lithium batteries, and the optional Bluetooth allows monitoring. Owner feedback highlights its space-saving design and reliable performance.
However, the 20A output is relatively low, meaning slower charging for larger battery banks. Also, the Bluetooth module is an extra cost. This unit is best for smaller systems or those who want an integrated solution. If you need faster charging or already have a separate solar controller, this may not be ideal.
- Combines DC-DC charger and MPPT solar controller in one unit
- Multi-stage charging for lithium batteries
- Bluetooth compatible with optional module
Pros: Dual input saves space and wiring; Good for solar-equipped RVs
Cons: Lower amperage may limit charging speed; Bluetooth module sold separately
6. IOTA Engineering DLS-45: Rugged Choice
The IOTA Engineering DLS-45 is known for its rugged construction and reliability. Our research shows it is a favorite among full-time RVers who prioritize durability. The IQ4 smart charger adjusts charging based on battery condition, but to use it with lithium batteries, you need the optional IQ4-Li module, which adds cost. Owner reviews praise its longevity even in harsh conditions.
The need for an extra module makes it less convenient than purpose-built lithium converters. Also, its larger size may be a challenge in tight spaces. This converter is best for those who value durability above all and are willing to buy the lithium module. If you want a ready-to-use lithium charger, look elsewhere.
- IQ4 smart charging technology optimizes for battery health
- Rugged aluminum housing for durability
- Can be used with lithium with optional IQ4-Li module
Pros: Very durable build quality; Long track record of reliability
Cons: Requires additional module for lithium compatibility; Larger size may not fit all compartments
7. PowerMax PM3-35: Budget Friendly
The PowerMax PM3-35 is a budget-friendly converter that can work with lithium batteries if you manually set the voltage switch. Based on owner feedback, it offers basic 3-stage charging and is easy to use. However, it lacks a dedicated lithium profile, so you must ensure the voltage settings match your battery specs. The build quality is adequate for the price, but not as robust as higher-end models.
This converter is best for those on a tight budget who are comfortable manually configuring settings. It is not recommended for beginners or those who want a set-and-forget solution. If you want a hassle-free lithium charger, consider spending a bit more for a dedicated model.
- Selectable voltage switch for different battery types
- 3-stage charging: bulk, absorption, float
- Compact and lightweight design
Pros: Very affordable price point; Simple operation with voltage selector
Cons: Not specifically designed for lithium; may need manual adjustment; Lower build quality compared to premium brands
Frequently Asked Questions
Do I need a special converter for lithium batteries?
Yes, lithium batteries require a converter with a lithium-specific charge profile. Standard converters may not reach the required absorption voltage (14.4V for LiFePO4) or may have a float voltage that is too high, which can damage the battery. A dedicated lithium converter ensures safe and efficient charging.
Can I use my existing RV converter with lithium batteries?
It depends. Some older converters can be adjusted to work with lithium by changing voltage settings, but many are not compatible. Check your converter’s specifications. If it does not support a lithium profile, it is safer to upgrade to a lithium-compatible model to avoid undercharging or overcharging.
What is the difference between a converter and an inverter?
A converter changes AC power (from shore power or generator) to DC power to charge your batteries and run 12V appliances. An inverter does the opposite: it converts DC battery power to AC power for household outlets. For lithium batteries, you need a converter that is compatible with their charging requirements.
How many amps do I need for my lithium battery bank?
A general rule is to choose a converter that provides 20-30% of your battery bank’s capacity in amps. For example, a 100Ah battery bank would benefit from a 20-30A converter. Larger banks may require 40-60A. Check the battery manufacturer’s recommendations for optimal charging current.
Can a lithium converter charge other battery types?
Many lithium converters offer selectable charge profiles for different battery chemistries, such as AGM, gel, or flooded lead-acid. Some have auto-detect features. Always check the product specifications to ensure it supports multiple battery types if you plan to switch batteries in the future.
Our Verdict
After researching and comparing the top models, the Progressive Dynamics PD9160ALV is our top pick for its dedicated lithium profile and reliable performance. For those who want smart features and customization, the Victron Energy Orion-Tr Smart is an excellent runner-up, offering Bluetooth control and programmability. Choose based on your specific needs and budget.
