Generac WiFi Propane Tank Fuel Level Monitor: The Complete 2026 Guide
Curious about the Generac WiFi propane tank fuel level monitor? This guide covers everything you need to know-from Generac's monitoring products and how they work, to setup instructions, Mobile Link app features, pricing, alternatives, Home Assistant compatibility, and exactly how Generac compares to other WiFi propane tank monitors in 2026.
Generac WiFi Propane Tank Fuel Level Monitor: Quick Answer
The short answer: Generac offers two main propane tank monitoring products-the Generac 4G LTE Propane Tank Monitor (~$199–249) and the Generac WiFi Propane Tank Monitor (~$199). Both use 4G LTE or WiFi connectivity to transmit tank level data to the free Mobile Link app, giving you real-time propane level monitoring from anywhere. Neither requires a monthly subscription fee. The main difference is connectivity: LTE works anywhere with cell coverage, while WiFi requires your home network.
Why it matters: Generac is one of the most trusted names in backup power and energy management. Their entry into the propane monitoring market brings consumer-friendly pricing, no monthly fees, and the reliability of a major brand. Understanding what Generac offers-and how it compares to DIY and competitors-helps you decide if it's the right choice for your home.
What Generac Offers: Propane Tank Monitoring Products
The Generac Propane Monitoring Lineup
Generac offers two connected propane tank monitoring solutions:
Product Connectivity Price Monthly Fee Key Feature
Generac 4G LTE Propane Monitor 4G LTE Cellular $199–249 $0 Works anywhere, no WiFi needed
Generac WiFi Propane Monitor 2.4 GHz WiFi $179–219 $0 For homes with stable WiFi
Generac WiFi + LTE Combo WiFi + LTE backup $249–299 $0 Best of both worlds
Generac 4G LTE Propane Tank Monitor ⭐
The flagship Generac propane monitoring product.
Key specifications:
Connectivity: 4G LTE cellular (no WiFi required)
Power: 4 AA batteries (included)
Battery life: Up to 5 years
Installation: Magnetic mount on any steel propane tank
Tank compatibility: Fits most 20 lb to 500 gallon propane tanks
Accuracy: 90–95%
App: Free Mobile Link app (iOS and Android)
Monthly fee: $0 (no subscription required)
Warranty: 3 years
What's in the box:
Generac 4G LTE propane monitor unit
Magnetic mount base
Mounting hardware for non-magnetic tanks
4 AA batteries
Quick start guide
Standout features:
✅ True 4G LTE connectivity-no WiFi or hub required
✅ Works anywhere with cell coverage
✅ Free Mobile Link app with unlimited history
✅ No monthly or annual subscription fees
✅ Integrates with Generac home backup generators
✅ Push notifications and email alerts
✅ Temperature-compensated readings
✅ Easy magnetic installation (under 5 minutes)
Generac WiFi Propane Tank Monitor
For homeowners with stable home WiFi who want Generac quality.
Key specifications:
Connectivity: 2.4 GHz WiFi
Power: AC adapter (included) + optional battery backup
Installation: Magnetic mount or bracket mount
Tank compatibility: Fits most propane tanks with steel surface
Accuracy: 90–95%
App: Free Mobile Link app (iOS and Android)
Monthly fee: $0
Warranty: 3 years
Key differences from LTE version:
Feature LTE Version WiFi Version
Range Unlimited (cellular) Within WiFi range
Setup Scan QR code, done Connect to WiFi network
Power Battery only AC powered
Best for RVs, remote tanks, no WiFi Home propane tanks
Price $199–249 $179–219
How Generac Propane Monitoring Works
The Technology Behind the Tank
Generac uses ultrasonic sensing technology to measure your propane tank's fill level:
The monitoring process:
Ultrasonic sensor mounted on the tank bottom emits sound waves
Sound reflects off the liquid propane surface and returns to the sensor
Travel time is measured with high precision
Microcontroller converts this to fill percentage
4G LTE or WiFi module transmits data to Generac's cloud server
Mobile Link app receives the data and displays your propane level
Alerts fire when propane drops below your set thresholds
Mobile Link App: Your Propane Dashboard
The Mobile Link app is the heart of Generac's propane monitoring system.
Available features:
Real-time propane level percentage
Estimated gallons remaining
Historical usage graph (daily, weekly, monthly views)
Customizable alert thresholds
Push notification alerts
Email alerts
Temperature display at tank location
Multiple tank support (one app, multiple monitors)
Integration with Generac home generator status
App screenshots describe:
Large, color-coded tank level display (green/orange/red)
7-day and 30-day usage history charts
Current temperature at tank
Estimated days remaining based on usage
Alert history and settings
Generac Propane Monitor Installation Guide
Step-by-Step Setup
Time required: 5–15 minutes (no tools needed for most installations)
Step 1: Check Tank Compatibility
Generac monitors work with most steel propane tanks:
Compatible tanks:
✅ Standard DOT propane tanks (20 lb, 100 lb, etc.)
✅ ASME stationary tanks (250–500 gallon)
✅ Underground buried tanks (with exposed top access)
✅ RV propane tanks (some models)
Installation requirements:
Steel tank surface (for magnetic mount)
Clear area on the bottom of the tank
Cellular signal at tank location (LTE version)
WiFi signal at tank location (WiFi version)
Step 2: Install the Monitor on Your Tank
For magnetic mount tanks:
Clean the bottom of the tank where you want to mount
Remove the protective film from the magnetic base
Position the monitor at the lowest point of the tank bottom
Press firmly to secure the magnet
The sensor must point directly at the tank bottom
For non-magnetic tanks:
Use the included bracket mounting hardware
Attach the bracket to the tank with hose clamps (included)
Snap the monitor unit into the bracket
Ensure the sensor is pointing at the tank bottom
Pro tip: The monitor should be installed on the lowest point of the tank where propane liquid accumulates. For horizontal tanks, this is the bottom center.
Step 3: Activate the Monitor
For LTE version:
Download the Mobile Link app from the App Store or Google Play
Create an account or sign in
Tap "Add Device" and select "Propane Monitor"
Scan the QR code on the monitor unit
The monitor will activate and connect to the cellular network
You should see your propane level within 5 minutes
For WiFi version:
Download the Mobile Link app
Create an account or sign in
Tap "Add Device" and select "Propane Monitor"
Follow in-app instructions to connect to your WiFi network
The monitor will connect to your home network
You should see your propane level within 5 minutes
Step 4: Configure Alerts and Settings
Recommended alert thresholds:
Level Percentage Action
Green 50–100% Normal monitoring
Yellow 25–49% Start planning refill
Orange 15–24% Schedule refill now
Red 0–14% Refill immediately
Alert configuration in app:
Open Mobile Link app
Tap on your propane monitor
Go to "Settings" or "Alerts"
Set custom thresholds for push and email notifications
Add emergency contact information
Generac vs. The Competition
How Generac Compares to Other Propane Monitors
Feature Generac 4G LTE SmartTank Pro WiFi Mopeka Pro Check DIY ESPHome
Price $199–249 $120–180 $65–80 $30–75
Connectivity 4G LTE WiFi Bluetooth WiFi
Monthly fee $0 $0 $0 $0
Accuracy 90–95% 93–96% 95–98% 93–97%
Home Assistant Limited Native MQTT Via bridge Full native
Installation 5 minutes 30–60 min 5 minutes 60–90 min
App quality Excellent Good Good DIY dashboard
Brand trust Generac (major brand) Specialty brand Specialty brand N/A (DIY)
Warranty 3 years 1–2 years 1 year N/A
Generac's Strengths
Why choose Generac:
✅ Major brand trust: Generac is a Fortune 1000 company with decades of energy experience ✅ No monthly fees: Unlike supplier-managed systems ($100–300/year), Generac charges nothing after purchase ✅ Works everywhere (LTE): No WiFi required-monitor any tank anywhere with cell coverage ✅ Generac ecosystem: If you have a Generac home backup generator, the Mobile Link app shows both ✅ Easy 5-minute install: Magnetic mount requires zero tools or professional help ✅ Free app: No subscription for app features ✅ Multi-tank support: Monitor unlimited tanks from one app ✅ Temperature display: See actual temperature at the tank (important for winter) ✅ 3-year warranty: Longer than most competitors
Generac's Weaknesses
Where Generac falls short:
❌ No Home Assistant integration: Unlike SmartTank Pro or DIY ESPHome, Generac doesn't offer MQTT or local API ❌ Lower accuracy (90–95%): Mopeka Pro Check (95–98%) and SmartTank Pro (93–96%) are more accurate ❌ Higher price than DIY: $199–249 vs. $30–75 for DIY ESPHome ❌ No local data storage: All data goes through Generac's cloud (vs. local MQTT) ❌ LTE model lacks WiFi: Can't integrate into local network ❌ Proprietary app only: You must use Generac's Mobile Link app
Is Generac's 4G LTE Worth the Premium Over WiFi?
Choosing Between LTE and WiFi
Choose Generac 4G LTE if:
Your propane tank is far from your house
You don't have WiFi at the tank location
You monitor an RV or remote property
You want the most reliable connectivity
You have a barn, workshop, or outbuilding without WiFi
Cell coverage is excellent at your tank location
Choose Generac WiFi if:
Your tank is near your house with good WiFi
You want the lowest price point
You prefer to keep all monitoring on your home network
You have stable home WiFi
You don't need monitoring at remote locations
The price difference: LTE is $20–50 more than WiFi. For most home propane tanks near the house, WiFi is sufficient. LTE is worth the premium for remote tanks, RVs, or unreliable home WiFi.
Generac Propane Monitor Pricing Breakdown
What You're Actually Paying
Generac 4G LTE Propane Monitor:
Item Cost
Monitor hardware $199–249
Mobile Link app Free
Cellular data service Free (included)
No monthly fee Free
No annual subscription Free
Total first year $199–249
5-year cost $199–249
Generac WiFi Propane Monitor:
Item Cost
Monitor hardware $179–219
Mobile Link app Free
WiFi data Free (your home network)
No monthly fee Free
Total first year $179–219
5-year cost $179–219
vs. Propane Supplier Monitoring:
Item Cost
Supplier monitoring hardware $0–50
Monthly/annual subscription $100–300/year
Contract required Yes
Total first year $100–350
5-year cost $500–1,500
Frequently Asked Questions
Q1: Does the Generac propane monitor require a monthly subscription?
A: No-Generac propane monitors have zero monthly fees. The $199–249 purchase price includes:
The monitor hardware
Cellular data service (LTE model)
WiFi connectivity (WiFi model)
Mobile Link app access (free forever)
All firmware updates
Cloud data storage
This is significantly different from propane supplier monitoring systems, which typically charge $100–300 per year. Once you buy a Generac monitor, you never pay again.
Q2: How accurate is the Generac propane tank monitor?
A: Generac propane monitors achieve 90–95% accuracy, which means the reading is typically within 5–10% of your actual fill level. For most homeowners, this is more than sufficient to know when to schedule a refill. The accuracy is slightly lower than competitors like Mopeka Pro Check (95–98%) or SmartTank Pro (93–96%), but the convenience and brand reliability often outweigh the minor accuracy difference.
Factors that affect accuracy:
Tank shape (round vs. cylindrical vs. underground tanks vary)
Temperature fluctuations (extreme cold or heat)
Propane type (HD-5 propane vs. propane-butane blends)
Installation position (must be at lowest point of tank)
Q3: Does Generac work with Home Assistant?
A: Generac does not officially support Home Assistant integration. Unlike SmartTank Pro WiFi (which has native MQTT) or DIY ESPHome solutions, Generac is a closed system:
Data goes through Generac's cloud only
No local API or MQTT broker
No official Home Assistant integration
The only way to access data is through the Mobile Link app
The workaround: Some users have reverse-engineered Generac's cloud API to pull data into Home Assistant, but this is unsupported and may break with firmware updates. If Home Assistant integration is critical, choose SmartTank Pro WiFi or DIY ESPHome.
Q4: How long do Generac propane monitor batteries last?
A: Generac estimates battery life at up to 5 years for the 4G LTE model on 4 AA batteries. Actual battery life depends on:
Temperature extremes (cold weather drains batteries faster)
Cellular signal strength (weaker signal = more power draw)
How often the monitor checks the tank level
Ambient temperature fluctuations
Battery tips:
Use lithium batteries for longer life in cold climates
Check battery level in the Mobile Link app monthly
Replace batteries proactively before winter
The app will alert you when batteries are low
Q5: Can Generac monitor multiple propane tanks?
A: Yes-Generac's Mobile Link app supports unlimited propane tank monitors. You can add multiple monitors (one per tank) and manage all of them from a single app:
See all tank levels at a glance
Each tank gets its own level display and history
Individual alert thresholds per tank
All tanks show in one unified dashboard
Useful for homes with multiple tanks (main house + garage, main house + barn)
Multi-tank pricing: Each Generac monitor costs $179–249. Two tanks = $358–498 upfront.
Q6: Can the Generac propane monitor be used on buried underground tanks?
A: Yes-with modifications. Generac monitors work on buried tanks by mounting at an exposed access point:
The monitor mounts at the tank's accessible monitoring port (usually at one end)
The sensor points down into the tank through the port
For fully buried tanks with no exposed surface, you need a mounting bracket
Generac includes bracket mounting hardware for non-magnetic surfaces
For underground tanks, the LTE model is often preferred (no WiFi cable needed underground)
Important: For buried tanks, the monitor's physical location (above ground) needs cellular signal (LTE) or WiFi coverage. Make sure your chosen connectivity works at the tank location before purchasing.
Q7: Does the Generac propane monitor work with Generac home backup generators?
A: Yes-one of Generac's strongest features is ecosystem integration. If you have a Generac home standby generator with Mobile Link connectivity:
Both your generator and propane monitor appear in the same Mobile Link app
See generator status and propane level in one dashboard
Propane fuel level affects generator runtime estimates
All alerts come through the same notification system
Useful for whole-home backup power scenarios
The propane-generator connection: If you have a propane-powered Generac generator, knowing your propane level is critical. When the propane tank runs low, your generator can't run. Generac's integration connects these two pieces of your energy infrastructure.
Q8: What happens if Generac's servers go down?
A: If Generac's cloud servers are unavailable:
The monitor continues measuring propane level locally
No data transmits during the outage
You won't receive notifications or see updated levels in the app
When servers come back online, the monitor reconnects automatically
No data is lost-it buffers and sends when connectivity is restored
The monitor itself continues operating normally
vs. DIY solutions: With DIY ESPHome or SmartTank Pro WiFi (local MQTT), your data stays on your own servers. There's no cloud dependency. This is one advantage of non-cloud monitoring solutions-but it requires more technical setup.
Q9: Is the Generac propane monitor waterproof?
A: Generac propane monitors are rated for outdoor use but are not fully waterproof. The unit is weather-resistant:
Designed for outdoor installation on propane tanks
Handles rain, snow, and temperature extremes
Battery compartment is sealed
Operating temperature: -40°F to 140°F
What this means for installation:
No need for an additional shelter in most climates
Avoid installing where standing water can pool
Direct pressure washing may damage the unit
Consider indirect mounting (under an eave) for added protection
LTE antenna should be positioned for best signal
Q10: How does Generac compare to the Mopeka Pro Check?
A: Generac and Mopeka serve different use cases:
Feature Generac 4G LTE Mopeka Pro Check
Connectivity 4G LTE (true remote) Bluetooth only
Remote access Yes, from anywhere No, must be near tank
To add remote access Built-in Need $30–50 WiFi bridge
Accuracy 90–95% 95–98% (highest)
Price $199–249 $65–80 (+ $30–50 for bridge)
Home Assistant No Via bridge
Installation 5 minutes 5 minutes
Brand trust Generac (major brand) Specialty brand
Choose Generac if: You want true remote monitoring with no extra steps, you prefer a major brand, and you have a Generac generator ecosystem.
Choose Mopeka Pro Check if: You prioritize maximum accuracy (95–98%), you have Home Assistant, and you don't mind adding a WiFi bridge for remote access.
Conclusion: Is the Generac WiFi Propane Tank Monitor Right for You?
The case for Generac:
✅ Major brand trust (Generac is a Fortune 1000 company)
✅ No monthly fees (save $500–1,500 over 5 years vs. supplier systems)
✅ 4G LTE model works anywhere-no WiFi required
✅ Easy 5-minute installation with magnetic mount
✅ Free Mobile Link app with excellent reviews
✅ Integrates with Generac home backup generators
✅ 3-year warranty
✅ Multi-tank support in one app
The considerations:
⚠️ No Home Assistant integration (deal-breaker for some users)
⚠️ Slightly lower accuracy (90–95%) vs. Mopeka (95–98%)
⚠️ Higher price ($199–249) vs. DIY ESPHome ($30–75)
⚠️ Cloud-only data (no local storage option)
The recommendation:
User Profile Best Generac Option Alternative
Has Generac generator Generac 4G LTE ⭐ N/A (ecosystem integration)
Want easiest setup Generac 4G LTE Mopeka Pro Check
Home Assistant user Skip Generac SmartTank Pro WiFi or DIY ESPHome
Budget-conscious Skip Generac DIY ESPHome ($30–75)
Maximum accuracy Skip Generac Mopeka Pro Check
Remote tank, no WiFi Generac 4G LTE ⭐ Cellular monitoring alternatives
The bottom line: Generac WiFi and LTE propane tank monitors are excellent choices for homeowners who want a major brand, no monthly fees, true remote monitoring, and a 5-minute installation. The Generac 4G LTE model is the standout-it works anywhere without WiFi, integrates with Generac generators, and costs nothing after purchase. If you're already in the Generac ecosystem, it's a no-brainer. If you need Home Assistant integration or want maximum accuracy, look elsewhere. But for mainstream homeowners wanting simple, reliable propane monitoring without subscriptions, Generac delivers.
Last updated: July 2026
Disclaimer: This guide provides general information about Generac propane tank monitoring products for educational purposes. Pricing, features, and availability may vary. Always check Generac's official website for the most current product information, pricing, and specifications. Consult a licensed propane technician for any work involving pressurized propane systems.
