Are Solar Trackers Worth the Extra Money?

What is a solar tracker?

A solar tracker is a mounting system that rotates panels to follow the sun's path across the sky, increasing daily energy production by 10-35% vs fixed-tilt installations. Two main types:

• Single-axis (E/W rotation): panels tilt east in morning, west in afternoon. Most common in commercial. ~15-25% production gain.
• Dual-axis (E/W + seasonal tilt): tracks both daily and seasonal angle. ~25-35% production gain. Premium pricing.

How tracker production gain breaks down

Higher latitudes benefit more because the sun's path is longer and more variable.

Tracker cost vs fixed-tilt

• Single-axis tracker for residential ground-mount: ~$0.20-0.40/W premium over fixed-tilt.
• Dual-axis tracker for residential: ~$0.40-0.80/W premium.
• For 10 kW system: single-axis adds ~$2,500-4,000; dual-axis adds ~$5,000-8,000.
• Plus higher O&M costs: motors, bearings, controls require maintenance every 1-3 years. Annual O&M ~$50-200 vs fixed-tilt $20-50.

When does a tracker pay back?

Sample math: Single-axis tracker in mid-latitude

• 10 kW system, fixed-tilt produces 14,000 kWh/yr
• 10 kW with single-axis tracker produces 17,300 kWh/yr (+24%)
• Extra production: 3,300 kWh/yr
• At $0.15/kWh: $495/yr extra savings
• Tracker premium: $3,200
• Payback: 6.5 years
• O&M tracker premium: $100/yr extra over 25-year life = $2,500 additional cost
• Adjusted total cost: $3,200 + $2,500 = $5,700
• 25-year extra savings: $12,375
• Net 25-year benefit: ~$6,675

Sample math: Dual-axis tracker

• 10 kW with dual-axis: 18,200 kWh/yr (+30%)
• Extra production: 4,200 kWh/yr
• Annual extra: $630
• Tracker premium: $7,000
• O&M extra: $200/yr × 25 yrs = $5,000
• Total: $12,000
• 25-year savings: $15,750
• Net 25-year benefit: ~$3,750 (modest)

Trackers don't make sense for...

• Roof-mount installations: trackers physically don't work on most roofs.
• Small systems (<5 kW): tracker overhead doesn't scale down.
• Heavy snow regions: snow loading can damage trackers; some manufacturers have weather modes that flatten panels in snow.
• Tornado / high-wind zones: trackers more vulnerable to wind damage than fixed-tilt.
• NEM 3.0 / net billing states: extra production exported at low rate, payback breaks.

Trackers DO make sense for...

• Ground-mount on rural land with significant acreage.
• Mid-to-high latitude (MN, ND, ME, MT) where gain is highest.
• Strong net metering at retail rate (MA, NJ, MD, ME, RI).
• Bifacial + tracker: compound gains, often 35%+ over fixed monofacial.
• Commercial solar >100 kW where the additional revenue more than offsets O&M.
• Off-grid systems with battery limits: tracker yields more usable production per cycle.

Tracker brands and types

Single-axis trackers

• Array Technologies (ATI) DuraTrack: commercial standard.
• Nextracker: commercial / utility-scale.
• Soltec: commercial.
• SunPower / Solar Foundations: residential single-axis kits.
• Pole-mount single-axis (DIY): SnapNrack, Tamarack Solar.

Dual-axis trackers

• AllEarth Renewables (now defunct, but installed base remains): residential.
• SmartFlower: small (~2.5 kW) all-in-one decorative dual-axis units.
• Wattsun: residential dual-axis.
• Clenergy: commercial dual-axis.

Common tracker problems

• Motor / actuator failure: 5-10% per year on cheap units. Quality units 1-2% per year.
• Slewing bearing wear: requires periodic greasing.
• Snow loading damage: tracker tilts panels into wind / snow.
• Wind damage: trackers must "stow" in high winds; failed stow = panel/module damage.
• Control software issues: tracking offset, GPS time errors.
• Hail damage: exposed motors more vulnerable.

Trackers vs more panels (the alternative)

Often, instead of paying for a tracker, you can simply install more fixed-tilt panels for the same cost. Compare:

Option A: 10 kW with single-axis tracker

• Cost: $30,000 + $3,500 tracker = $33,500
• Production: 17,300 kWh/yr

Option B: 12.5 kW fixed-tilt

• Cost: $33,500 (assuming $2.68/W)
• Production: 17,500 kWh/yr

Same cost, similar production, much lower O&M. Often the smarter choice unless space is limited.

When MORE panels beat a tracker

• You have unlimited roof / ground space.
• Your state has 100%+ NEM and unlimited capacity (otherwise extra production is wasted).
• You don't want O&M complexity.

When tracker beats more panels

• Land is constrained.
• You want production curve flattening (more value in early morning + evening).
• Off-grid system where tracker reduces battery cycling.
• Bifacial + tracker stacks gains.

Frequently asked questions