Mobile RV Lithium Battery Upgrades in Central Texas
Most RV owners who upgrade to lithium batteries say the same thing afterward: they did not realize how much of their battery capacity they were never using. A 200Ah lead-acid bank has about 100Ah of capacity you can actually draw without shortening its life. A 200Ah lithium bank gives you 160 to 170Ah you can actually use — and it recharges in a fraction of the time. Boss Bull Mobile RV Services installs lithium house battery systems across Central Texas at your location, working with Battle Born and Expion360 LiFePO4 systems.
Every repair, no questions asked.
Better Business Bureau accredited.
$500–$25,000. 0–35.9% APR based on creditworthiness.
Austin and Central Texas.
Overview
The capacity problem with lead-acid batteries is structural. They are designed to be cycled between 50 and 100 percent state of charge — deeper discharges cause sulfation that permanently reduces capacity. That means the 100Ah battery bank that came with your RV is really a 50Ah battery bank in regular use. Lithium iron phosphate batteries do not have that restriction. They can be discharged to 20 percent or lower without damage, and they maintain a more consistent voltage output through that entire discharge range — so your lights do not dim and your water pump does not lose pressure as the batteries drop.
Weight is the other dimension that matters to RV owners. A 100Ah Battle Born LiFePO4 battery weighs approximately 31 pounds. A comparable 100Ah AGM battery weighs around 65 pounds. For an owner replacing a 200Ah lead-acid bank with a 200Ah lithium bank, the weight savings are real — and for fifth-wheel and travel trailer owners who are close to their truck's payload rating, that weight comes directly off the tongue.
Every lithium installation Boss Bull completes includes verifying that the shore power converter and solar charge controller charge profiles are configured for LiFePO4. This step is not optional — a converter delivering a lead-acid bulk charge profile to a lithium bank will not charge the bank to full capacity, and some older converters cannot be reconfigured and need to be replaced. We identify and address that compatibility question before the installation is confirmed.
Lithium battery bank installed in an RV battery compartment. Cable connections, terminal hardware, and fusing are documented before converter and charge controller configuration is completed.
After physical installation, the shore power converter and solar charge controller are both confirmed to be set for LiFePO4 charge profiles before the system is commissioned. An incorrectly configured converter undercharges a lithium bank on every shore power connection.
Common Problems We Fix
- House batteries deplete quickly during off-grid use
- Current battery bank takes a long time to charge after solar or shore power
- Existing lead-acid or AGM batteries are at end of service life and due for replacement
- Planning extended dry camping and need more usable house battery capacity
- Installing solar and want a battery bank that maximizes the benefit of the solar system
- Generator runtime is excessive and a higher-capacity battery bank would reduce it
Common Findings During RV Lithium Battery Upgrades Service Calls
Lithium battery upgrade installations regularly involve ancillary items beyond the battery swap itself. The following appear most frequently.
- Shore power converter charge profile configuration for LiFePO4 — most converter settings need to be adjusted from the lead-acid default
- Solar charge controller parameter update for lithium charge profile and absorption voltage
- Battery terminal and cable condition — corroded or undersized cables that need replacement before the new battery bank is installed
- Battery compartment ventilation review — lithium batteries do not require the same ventilation as lead-acid but the compartment condition is assessed
- Fusing and disconnect hardware review — proper fusing between the battery bank and the distribution system is confirmed during installation
- Battery monitoring system installation — shunt-based monitors like the Victron BMV series are installed when the owner wants accurate state-of-charge tracking
Technician Observations
What Owners Commonly Report
Presenting complaints we hear most often on these service calls.
- My batteries are dead by morning even when I do not run heavy loads
- I dry camp regularly and my current batteries do not last through the day
- My batteries are several years old and I want to replace them with something better
- I am installing solar and want batteries that work well with solar charging
- I want to reduce how much I run the generator at night
What We Frequently Find
Actual conditions we document when we arrive on site.
- Lead-acid battery banks that are sulfated or have one or more weak cells — a common condition in batteries that have been stored discharged or repeatedly deep-discharged; replacement with lithium is often more practical than replacing lead-acid with lead-acid at this stage
- Shore power converters configured with lead-acid charge profiles that will not properly charge lithium batteries — Victron and Progressive Dynamics converters can often be reconfigured; older or less configurable converters may need to be replaced
- Solar charge controllers that need to be reconfigured for LiFePO4 charge parameters — most MPPT controllers support lithium profiles but need to be set correctly
- Battery compartments sized for Group 24 or Group 27 lead-acid batteries that fit Battle Born or Expion360 drop-in replacements without modification
- RV owners who want lithium but are concerned about converter compatibility — verifying the existing charging equipment before installation is part of the service
Service Recommendations
What we typically advise based on our findings.
- Verifying shore power converter compatibility with lithium is an essential first step — installing lithium batteries without confirming the converter's charge profile will not damage the batteries immediately but will result in undercharging and reduced performance
- Battle Born and Expion360 batteries are drop-in replacements for Group 24 and Group 27 lead-acid batteries in most standard RV battery compartments — physical fitment is typically straightforward
- A lithium upgrade paired with a solar installation provides the best return on both investments — solar charges lithium faster and more efficiently than it charges lead-acid, and lithium provides more usable storage for the energy the solar array generates
- Battery bank sizing — the total amp-hour capacity to install — depends on actual electrical load and the desired days of autonomy without shore power or solar input; we discuss this with the owner before the installation is confirmed
Why RV Owners Choose Mobile RV Service
- More usable capacity installed at your location — battery swap, converter configuration, and charge controller update completed on site in a single visit
- Converter and solar charge controller compatibility verified and configured as part of every lithium installation
- Service at RV parks, campgrounds, storage facilities, and residences across Central Texas
- Service across Central Texas including Austin, Round Rock, Georgetown, Cedar Park, Kyle, Buda, and surrounding areas
- Financing available through Wisetack for battery system upgrades
Lithium Battery Brands & Systems We Install
- Battle Born Batteries: 100Ah and 270Ah GC3 LiFePO4 with integrated BMS
- Expion360: 100Ah and higher-capacity LiFePO4 with integrated BMS and monitoring
- Victron Energy: BMV-712 and SmartShunt battery monitors for accurate state-of-charge tracking
- Progressive Dynamics: converter reconfiguration for lithium compatibility
- Victron Energy: MultiPlus inverter-charger configuration for lithium profiles
- Renogy and Victron MPPT solar charge controller lithium profile configuration
- Battery cable and terminal replacement as part of the installation
- Shore power and solar system integration following battery bank replacement
Related Services
Service Areas
Frequently Asked Questions
What Our Customers Say
“Our camper AC went out and we called Rich on a Saturday, thinking no way we were going to get someone out on the weekend. But Rich came out that afternoon, took a look at the unit and came up with a solution.”
“He went into great detail telling me what was wrong (even showed me) and what would need to be done. He is very responsive, respectful and efficient!”
“Prices are fair. They communicate well. They show up on time. They do what they say they will do. I will never use someone else.”
Ready to get your RV back in service?
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