RV Inverter Installation in Sebastian
Pure sine wave inverters, transfer switch integration, shore power bypass, and battery bank wiring. $300 to $1,500. Run your AC appliances off-grid.
TL;DR
- Pure sine wave inverters recommended for all RV applications, 1000W to 3000W
- Automatic transfer switch for seamless switching between inverter and shore power
- Heavy-gauge wiring (2/0 to 4/0 AWG) with proper fusing for safe operation
- Installation wired to your breaker panel following NEC Article 551 standards
- Complete installation from $300 to $1,500 depending on inverter size and complexity
Turning Battery Power into Usable AC Electricity
An inverter converts 12V DC power from your battery bank into 120V AC power, the same type of electricity that comes from a wall outlet or your shore power connection. Without an inverter, your batteries can only run 12V devices like LED lights, water pumps, and USB chargers. With an inverter, you can run your residential fridge, microwave, coffee maker, TV, laptop charger, and just about anything else you'd plug into an outlet at home.
For RV owners in Sebastian who boondock at places like Sebastian Inlet State Park or dry camp at Pelican Island, an inverter is what makes the difference between "roughing it" and living comfortably off the grid. Paired with a solar panel array and a lithium battery bank, a properly sized inverter lets you run your rig just like you're plugged into shore power. How long you can run depends on your battery capacity and solar input, but a well-designed system can keep you going indefinitely in Florida's abundant sunshine.
Pure Sine Wave vs Modified Sine Wave
This is the single most important decision when choosing an inverter. A pure sine wave inverter produces a smooth, clean AC waveform that's identical to grid power. It runs everything without issues: sensitive electronics like laptops and smart TVs, variable-speed motors in residential fridges and fans, CPAP machines, microwave ovens, and battery chargers for power tools. There are zero compatibility headaches.
A modified sine wave inverter produces a stepped, blocky approximation of an AC waveform. It's cheaper, and it works fine for simple resistive loads like incandescent lights and basic heaters. But it can cause problems with anything that has a motor, a digital display, or sensitive circuitry. Microwaves run inefficiently and may not heat properly. Audio equipment buzzes. Some CPAP machines won't work at all. Laptop chargers run hotter than they should. For the $150 to $300 price difference between modified and pure sine at similar wattages, there's no reason to gamble with compatibility in your RV. We install pure sine wave inverters exclusively.
Sizing: 1000W, 2000W, or 3000W
The right inverter size depends on what you want to run simultaneously. A 1000W inverter handles a TV (100W), a laptop charger (90W), LED lights (50W), phone chargers (30W), and a CPAP machine (60W) all at the same time with room to spare. It won't run a microwave or a coffee maker, both of which draw 1000W or more.
A 2000W inverter is the most popular size we install. It covers everything a 1000W does, plus it can handle a residential fridge (150 to 400W), a microwave (one at a time), a hair dryer on low (1000W), and small kitchen appliances. You still can't run multiple high-draw devices at the same time, but with some awareness of what's on, a 2000W inverter covers 90 percent of what most RV owners need.
A 3000W inverter handles everything short of the rooftop AC and electric water heater. It can run a full kitchen setup with the fridge, microwave, and coffee maker simultaneously. Some 3000W inverter/charger combos like the Victron MultiPlus can even start an AC unit with a soft-start kit if you have a battery bank of 400Ah or larger. At this level, you're building a system that truly replaces shore power.
Transfer Switch and Shore Power Integration
A transfer switch is what makes an inverter installation seamless. Without one, you'd need to manually flip switches or swap cables every time you plug into or disconnect from shore power. An automatic transfer switch monitors both power sources and switches between them in milliseconds. When you plug into shore power at a campground, the transfer switch disconnects the inverter and feeds grid power to your circuits. When you unplug, it switches back to inverter power instantly. Your fridge, clocks, and devices never skip a beat.
Some inverter/charger combos have the transfer switch built in. The Victron MultiPlus and Aims Power units include automatic transfer, built-in battery charging, and power assist (where the inverter supplements shore power during high-demand moments). These all-in-one units cost more upfront but simplify installation and reduce the number of individual components in the system. We install the transfer switch between your shore power inlet and your AC breaker panel, following NEC Article 551 standards for RV electrical systems.
Wiring and Battery Bank Requirements
Inverter wiring is where corners get cut by DIY installers, and it's where fires start. A 2000W inverter running at full load on a 12V system draws about 170 amps. At that current level, you need 2/0 AWG or 4/0 AWG cables between the inverter and the battery bank, a Class T or ANL fuse rated for the cable size, and cable runs as short as physically possible to minimize voltage drop and heat buildup.
We mount the inverter within 3 to 5 feet of the battery bank whenever possible. Every connection is torqued to specification, crimped with hydraulic crimpers (not hardware store crimp tools), and heat-shrink sealed. The fuse is installed within 12 inches of the battery positive terminal. We also install a battery disconnect switch that lets you completely isolate the inverter from the batteries when the rig is in storage. In Florida's heat, a loose connection or undersized wire creates heat, and heat in an electrical system can lead to a fire. We don't take shortcuts on inverter wiring because the stakes are too high.
Inverter Installation FAQ
A pure sine wave inverter produces clean AC power identical to what comes from a wall outlet or shore power. It runs everything without issues: sensitive electronics, variable speed motors, medical devices, and microwave ovens. A modified sine wave inverter produces a stepped approximation of a sine wave that works for basic loads like lights and phone chargers but can cause problems with sensitive electronics, produce a buzzing sound in audio equipment, and overheat certain motor-driven appliances. The price difference is significant. A 2000W modified sine inverter costs $150 to $300, while a 2000W pure sine inverter costs $400 to $800. For RV use, we almost always recommend pure sine because it runs everything in your rig without compatibility headaches.
That depends on the inverter size and your battery bank. A 1000W inverter handles a TV, laptop charger, phone chargers, LED lights, a CPAP machine, and a small microwave (if rated under 1000W). A 2000W inverter adds the ability to run a residential fridge, a coffee maker (one at a time, not simultaneously with other high-draw items), a hair dryer on low, and most kitchen appliances under 2000W. A 3000W inverter can handle nearly everything except the AC unit and electric water heater. Running a 13,500 BTU air conditioner requires a 3000W+ inverter with a soft-start kit and a large lithium battery bank of 400Ah or more. We size inverters based on what you actually need to run simultaneously, not just the biggest number.
Add up the wattage of every device you want to run at the same time. A residential fridge draws 150 to 400 watts. A TV uses 60 to 150 watts. A laptop charger pulls 60 to 90 watts. A microwave draws 1000 to 1500 watts but only for a few minutes at a time. Your inverter needs to handle the combined peak draw of everything running simultaneously, plus a 20 percent safety margin. For most RV owners who want to run a fridge, TV, and charge devices off-grid, a 2000W pure sine inverter is the sweet spot. If you want to run a microwave or coffee maker while the fridge is running, step up to 3000W. We'll calculate your specific load and recommend the right size.
A basic 1000W pure sine wave inverter installation costs $300 to $500 including the inverter, wiring, fuses, and labor. A 2000W inverter with transfer switch integration runs $600 to $1,000. A 3000W inverter/charger combo with automatic transfer switch and shore power bypass costs $1,000 to $1,500. The wiring is often the biggest labor component. Inverters draw heavy current from the batteries (a 2000W inverter pulls about 170 amps at full load on a 12V system), which requires large-gauge cables (2/0 or 4/0 AWG), high-amperage fuses, and short cable runs to minimize voltage drop. Transfer switch installation adds $100 to $300 depending on complexity.
It depends on what you're running. An inverter itself draws very little when idle, typically 10 to 25 watts. The real drain comes from the loads you're powering. A TV drawing 100 watts through the inverter pulls about 9 to 10 amps from a 12V battery bank (accounting for inverter efficiency losses of about 10 to 15 percent). At that rate, a 200Ah lithium battery bank would last about 16 to 18 hours running just the TV. A residential fridge cycling at an average of 60 watts pulls about 5 to 6 amps continuously. Combined with a TV and some lights, you're looking at 15 to 20 amps total draw, which gives you 8 to 12 hours from a 200Ah lithium bank before needing to recharge from solar or shore power.
The inverter connects to your battery bank with heavy-gauge cables and converts 12V DC to 120V AC. The 120V output then feeds into your RV's AC breaker panel, either directly to specific circuits or through an automatic transfer switch. The transfer switch is the key component for seamless operation. It monitors both the inverter output and shore power. When you plug into shore power, the transfer switch automatically disconnects the inverter and feeds shore power to your circuits. When you unplug, it switches back to inverter power within milliseconds. This means your fridge, outlets, and other AC devices work continuously without manual switching. We wire the transfer switch between your shore power inlet and your breaker panel following NEC Article 551 standards.