Hidden Costs of Robot Mower Ownership — What to Budget For

MA MowAutonomous Editorial Team · Updated 2026-06-23 · 10 min read

The sticker price of a robot mower ($1,300-$3,900) is just the beginning. There are several hidden costs you should budget for: installation, accessories, maintenance, and eventual battery replacement. This guide covers them all.

1. Installation Costs

If you don't already have an outdoor GFCI-protected electrical outlet near where you want to mount the charging station, you'll need an electrician to install one. Cost: $200-$500 depending on the distance from your electrical panel. Most homeowners don't need this — but if you do, it's a meaningful upfront cost.

2. Mower Garage ($100-$300)

A mower garage protects the charging station from sun and rain, extending its life significantly. Most charging stations last 5+ years with a garage vs. 2-3 years without. At $100-$300, a garage is cheap insurance for a $2,000+ mower. Some manufacturers make brand-specific garages; generic ones work too.

3. Replacement Blades ($60-$200/year)

Robot mower blades need replacement every 1-3 months depending on lawn size and grass type. Replacement blades cost $15-$40 per set. Budget $60-$200/year for blades. Stock up — you don't want to wait for shipping when your blades go dull mid-season.

4. Battery Replacement ($150-$400, every 5-8 years)

Lithium-ion batteries degrade over time. Expect to replace the battery once during the mower's lifespan — typically at year 5-7. Replacement batteries cost $150-$400 depending on capacity. Budget $25-$60/year for the eventual replacement.

5. GPS Tracker Subscription ($30-$50/year, optional)

If your mower doesn't have built-in GPS (most RTK-GPS mowers do, but budget mowers may not), consider an aftermarket GPS tracker for anti-theft. Cost: $30-$80 upfront plus $20-$30/month subscription. Optional but recommended for expensive mowers in theft-prone areas.

6. Electricity ($10-$20/year)

Robot mowers use very little electricity — typically 50-150 kWh per year. At the US average rate of $0.16/kWh, that's $8-$24/year. Negligible compared to other costs.

7. Maintenance Supplies ($30-$50/year)

Annual maintenance supplies: cleaning brush, compressed air, isopropyl alcohol for cleaning contacts, spare screws and fasteners. Budget $30-$50/year.

8. Repairs ($50-$100/year average)

Over the mower's lifespan, you'll likely need some repairs: motor replacement, sensor replacement, chassis repair. Budget $50-$100/year average. Some years you'll spend $0; some years you'll spend $300. The average works out.

9. Extended Warranty ($100-$300, optional)

Most robot mowers come with a 2-year manufacturer warranty. Extended warranties (3-5 years) are available from most manufacturers for $100-$300. Worth it for premium mowers ($2,500+) since repairs can be expensive.

Total Annual Cost of Ownership

Here's the total annual cost of ownership for a typical $2,500 robot mower: (1) Blades: $120/year. (2) Battery replacement (amortized): $50/year. (3) Electricity: $15/year. (4) Maintenance: $40/year. (5) Repairs: $75/year. (6) GPS tracker (if needed): $30/year. Total: $330/year, or $3,300 over 10 years. Add the $2,500 purchase price and you're at $5,800 total over 10 years, or $580/year.