Generac G0073240 18kW Home Backup Generator Review: Built-In Cellular Connectivity for Remote Monitoring

Where the G0073240 18kW Fits

Generac G0073240 18kW Whole Home Generator delivers 18000 watts for you if you need whole-home backup at 240 Volts.

If your house needs 240 Volts for backup power, a generator with the wrong output format becomes a dead end before the outage even starts.

Generac G0073240 18kW matches that scenario with 18,000 watts, which is the deciding running figure for this model.

We screened 17 home backup generators and selected 7 for full review. This one has 3 buyer ratings, the 8th most of the 17 screened. Full reviews go to the most-rated products that pass screening, at most 2 per brand. This review is for you if you are comparing whole-home generators and need the numbers stated plainly.

The Short Answer on the G0073240 18kW

Best for: you need a 240-volt home backup generator for a residential setup that calls for dual-fuel operation and transfer-switch readiness.

G0073240 18kW is the right pick here, and it costs around $4,329.

• Pro: Its 18,000-watt output gives you enough running power for whole-house standby use in the average-home range.
• Pro: The 240-volt output matches North American home panels and transfer equipment.
• Pro: It states dual fuel and transfer switch ready, which helps if your setup depends on that fuel choice and hookup format.
• Con: It only states 3 buyer ratings, so the 5.0 average does not settle anything about reliability or quality.
• Con: The Mobile Link premium subscription requirement adds an ongoing cost for buyers who want app-based monitoring.

Don’t buy this if: your setup needs a 120/240V split-phase portable with an NEMA L14-30R outlet instead of a standby generator.

Price assessment: $4,329 is a premium price for this spec set, especially with dual fuel, 240 volts, and transfer-switch readiness.

Choosing the wrong size can waste money on a return or leave you replacing a generator that does not fit your home load plan.

Specifications That Matter for this Home Backup Generator

Running watts separates this home backup generator most, because it measures the steady electrical power the unit can supply while it is operating.

Before You Buy: Home Generator Checklist

The first thing to check is whether your home needs 240 Volts and 18,000 running watts before you order this home backup generator.

• ☐ Confirm your panel and transfer equipment are set up for 240 Volts — this unit states 240 Volts, and a mismatch leaves you with a generator you cannot use as intended.
• ☐ Verify that you want a dual fuel generator — dual fuel is stated here, and choosing the wrong fuel type means the runtime and maintenance burden may not match what you planned.
• ☐ Budget for the Mobile Link premium subscription — the listing says the subscription is required, and ignoring that cost leaves you with app features you cannot keep using without paying for them.

If your home cannot use 240 Volts or your combined loads are higher than 18,000 watts, you should not buy this generator.

Performance: What the Specs Deliver

How 18,000 running watts support whole-home output

G0073240 18kW can cover a full-house backup load for many homes because it states 18,000 running watts and 240 Volts. That level is the one that moves from partial coverage toward whole-home standby for an average house, so you can plan on fewer load-shedding choices than with a smaller portable generator.

If your home already has a 120/240V split-phase panel, compare your largest simultaneous loads against 18,000 watts before you buy. If the house needs central HVAC plus several other large appliances at once, this rating gives you room; if your demand is lower, the extra capacity may not change the outage plan much.

How built-in cellular connectivity enables remote monitoring

G0073240 18kW includes built-in cellular connectivity and Mobile Link app compatibility, so you can check status away from home instead of relying only on the unit itself. It also lists a Mobile Link premium subscription requirement, which means the remote view is not entirely free to use over time.

The same connectivity is useful if you want outage awareness while you are away, especially for a standby generator for home that may sit idle for long stretches. Compatible ecobee by Generac and Generac Home Energy Ecosystem support also point to a broader control setup, but the subscription requirement is the trade-off you need to budget for.

Automatic outage detection and overload protection

Generac G0073240 18kW includes automatic outage detection, automatic idle control, oil level sensors, and overload protection. Those features matter because they reduce the number of outage conditions you have to watch manually and help protect the generator from avoidable strain.

The cold start performance and electronic fuel and ignition control are useful if your backup plan depends on starting in poor weather or after long idle periods. Dual fuel support adds another planning choice for runtime and supply, while the sloped roof and rear intake are part of the fully enclosed design that suits a fixed residential install.

Which Jobs the G0073240 18kW Handles, Worked Out From Its Specs

The G0073240 18kW against the jobs buyers ask about, worked out from its listed running watts and a typical need for each job.

You may also explore alternatives to a home backup generator for different power needs.

How the G0073240 18kW Compares to Other Home Generators

G0073240 18kW has 18,000 running watts and 240 volts, so it brings more steady output than the other home backup generators in this comparison. It is also priced around $4,329, the same as the Generac 14kW model, while offering the larger wattage figure.

• Against the Honda EU7000IS, G0073240 18kW has 18,000 running watts instead of 5,500 watts. That gap matters if your load needs more steady output than a smaller inverter generator can supply.
• Against the Generac 24kW Whole Home Generator, the price is lower by about $430.
• Against the Generac Guardian 14kW, G0073240 18kW states dual fuel, while the Guardian listing does not. Dual fuel gives you two fuel options, which can matter if fuel availability is part of your decision.
• Against the Kiger 650W Gasoline Generator, this model states 240 volts, while the Kiger lists 220V. Voltage matters when you need the outlet format to match your home setup.
• Among the four products here that state a buyer rating, G0073240 18kW ranks first with a 5.0 average from 3 ratings. That sample is too small to say much about quality or reliability.

If you want the cheapest option, the Kiger 650W Gasoline Generator is the one to pick instead. If you need far less power and a much lower price, that is the better fit.

If you need a slightly smaller capacity, see our full review of the Guardian 14kW.

For a portable option, you can view the Honda EU7000IS spec breakdown.

Where this price sits for similar home backup generators

At around $4,329, G0073240 18kW sits $393 above the $3,936 average for the similar home backup generator products we compared it against. That price buys 18,000 watts, 240 Volts, dual fuel support, and transfer switch ready status, but the Mobile Link app needs a premium subscription, so you should count that extra cost if remote monitoring matters to you.

This price makes sense if you want a whole-home standby generator with 18,000 watts and you value dual fuel operation, transfer switch readiness, and built-in cellular connectivity over a lower upfront bill. The 5.0 average from 3 buyer ratings is too small a sample to settle anything about quality or reliability, so the price case rests on the stated specs and the subscription cost, not on that score.

From Delivery to First Use with This Home Backup Generator

Getting G0073240 18kW ready for a 240-volt home connection

A 240-volt connection is the starting point for G0073240 18kW, because the unit is listed at 240 Volts and 18,000 watts.

1. Confirm the 240 Volts rating against the connection you plan to use.
2. Place the generator where the fully enclosed design and sloped roof can sit clear of obstructions.
3. Match the transfer equipment to the generator’s transfer switch ready setup.
4. Check the battery match for electric start units, since the listing names a battery as the starting-power accessory.
5. Verify the inlet box and power cord match the transfer equipment before first use.

Which accessory matters first if you want this home backup generator to feed circuits? The transfer switch kit is the one that lets the generator feed home circuits safely.

Warranty and support checks for this house generator

Cover differs by seller and country, so the return window matters here.

• Confirm the transfer switch kit coverage, because the listing says the generator is transfer switch ready but does not include that kit.
• Confirm the battery requirement for your starting setup, because electric start support depends on a separate starting source.
• Confirm the Mobile Link premium subscription terms, because built-in cellular connectivity and app use depend on that paid service.
• Confirm the inlet box and power cord match the transfer equipment you plan to use, because the generator’s 240 Volts output has to meet the rest of the connection chain.

On the day it arrives, record the model label and the included components before the return window closes.

The G0073240 18kW: Remaining Questions

How much power does the G0073240 18kW provide?

G0073240 18kW is rated at 18,000 watts and 240 volts. That output is enough for whole-house standby use in many average homes, and it gives you room for multiple household loads at once.

Is the G0073240 18kW dual fuel?

Yes, the G0073240 18kW is listed as dual fuel. That matters if you want fuel flexibility, but the listing does not state the exact fuel pair.

Is the G0073240 18kW transfer switch ready?

Yes, the G0073240 18kW states transfer switch ready. That makes the hookup format relevant to your purchase, because home backup generators need the right interface for safe connection.

What does the Mobile Link app add to the G0073240 18kW?

Mobile Link app compatibility lets you monitor the G0073240 18kW from a phone, and built-in cellular connectivity supports that feature. A premium subscription is required, so the app function is not free to use in full.

Should I buy the G0073240 18kW for a whole house?

Choose the G0073240 18kW if you want an 18,000-watt standby generator for residential use. The $4,329 price sits in the whole-home range, and the 5.0 average across 3 buyer ratings is too small a sample to settle anything about quality or reliability.

New owners should start by reading how a home backup generator works.

Is the G0073240 18kW Right for You?

Who the G0073240 18kW suits and the jobs it is the wrong choice for, listed below with the reason for each.

Where to Buy This House Generator

Home backup generators are sold by the retailers below – we do not track which of them has the G0073240 18kW in stock, so check availability and the current price with the retailer before making a trip.

• Generac (online only) — manufacturer direct for product information and dealer-finder support
• Home Depot (online and physical stores) — broad range of home backup generators and in-store returns
• Lowe’s (online and physical stores) — broad range of home backup generators and in-store returns
• Costco (online and physical stores) — useful for membership pricing and limited curated selection
• Northern Tool + Equipment (online and physical stores) — specialist staff and a category-focused generator assortment
• Electric Generators Direct (online only) — specialist retailer with deep generator-focused range
• Walmart (online and physical stores) — useful for broad marketplace-style selection and easy returns

Final Verdict on the G0073240 18kW

You need a 240-volt home backup generator with 18,000 running watts for a whole-home standby setup. G0073240 18kW is priced around $4,329.

Its 18,000-watt output is the strongest data point here. That is the figure that matters when you want a generator sized for residential backup loads, not a smaller portable unit. The listing also states dual fuel and transfer switch ready, but it does not state the transfer equipment itself. The 5.0 average comes from 3 buyer ratings, and that sample is too small to settle anything.

Skip it if: you need a smaller portable for lighter outage loads, or you need a listing that states a transfer switch or interlock kit in the box.