Compare Generator Models: 18 kW vs 22 kW vs 26 kW Generac®

1) Overview – Why Size Matters

Generator size determines startup capacity, fuel efficiency, and total comfort. In South Florida — where homes often exceed 2,000 sq ft and air conditioning is essential — proper sizing prevents overload and keeps voltage stable.

2) Power Output & Performance

18 kW Generac Guardian

• 72 A @ 240 V (3-ton AC + essentials)
• Fuel: 200 ft³ NG/hr | 2.0 gal LP/hr @ 50%
• Best for smaller homes with load-shedding.

22 kW Generac Guardian

• 91 A @ 240 V (5-ton AC + kitchen)
• Fuel: 219 ft³ NG/hr | 2.3 gal LP/hr @ 50%
• Most popular size in South Florida.

26 kW Generac Guardian

• 108 A @ 240 V (two AC units or pool equipment)
• Fuel: 245 ft³ NG/hr | 2.6 gal LP/hr @ 50%
• Highest-output residential air-cooled model.

3) Installation Footprint

All models share Generac’s composite base (48 × 25 in) and require:

• 4-inch concrete or prefab pad
• 18 in from structure; 5 ft from openings
• ≈ 460–480 lb | ≈ 67 dB(A) @ 23 ft

4) Fuel & Efficiency Comparison

5) Load Capacity Examples

6) Cost-of-Ownership Snapshot (10 Years)

7) Which Model Fits You Best?

8) Financing Example

Formula:
Monthly Payment = (Total Cost × (1 + Interest Rate)) ÷ Term

Example: $15,000 × 1.0799 ÷ 84 ≈ $193/month

0% for 12 months and low-APR plans available.

9) FAQs

How do I know if I need 22 kW or 26 kW?

Two AC units or pool + electric range typically justify 26 kW.

Can I add load management later?

Yes — Generac Smart Management Modules allow staged startup.

What’s installation lead time?

Typically 2–4 weeks after permit approval.