Size.Solar

Best solar panel angle in Johannesburg

Start with 24° facing North for a fixed setup. Compare seasonal options, then confirm the result against your roof, shade, and local weather.

Turn this angle into a roof plan

Start with 24° North in Johannesburg, then verify the usable roof area and request installer options.

Build roof plan & find installers Estimate production

1. Best fixed tilt & direction

24°

24° facing North. Set it once for the entire year.

Planning basis: latitude and estimated annual solar production.

2. Two adjustments / year

Winter: 31° North

Summer: 18° North

Provides a 1.6% gain over the best fixed tilt.

Planning basis: summer and winter production estimates.

3. Four adjustments / year

Summer10° North

Autumn26° North

Winter42° North

Spring26° North

Offers a 4.7% gain over the best fixed tilt.

Planning basis: four seasonal production estimates.

4. Twelve adjustments / year

Jan10° North

Feb10° North

Mar19° North

Apr26° North

May33° North

Jun42° North

Jul42° North

Aug42° North

Sep33° North

Oct26° North

Nov19° North

Dec10° North

Achieves the maximum 4.7% gain over the best fixed tilt.

Planning basis: twelve monthly production estimates.

*Tilt angles are measured from horizontal. Each non-flat result includes the compass direction the panel faces. Gains are estimates based on modeling.

Quick estimate — not a final quote

Good for a quick comparison. For a quote, check your roof, shade, and local weather in a project.

Quote-ready tilt decision

Give installers one fixed-angle target first

Start the quote conversation with 24° North. Seasonal adjustment is only worth pricing if a supplier can show that roughly 4.7% extra production beats the cost, access risk, and warranty complexity of adjustable frames.

Base quote

24° North

Best default for normal roof-mounted systems and the first number to send to installers.

Adjustable option

Winter: 31° North

Summer: 18° North

Four seasonal changes model about 4.7% gain. Monthly adjustment models about 4.7%.

Installer checks

Roof pitch, available rail angles, wind loading, waterproofing, access for cleaning, and whether adjustment affects warranty.

Direction check

In Johannesburg, the practical target is a north-facing array. Shade-free roof space, inverter sizing, and battery goals usually matter more than small angle differences.

Adjustment payoff · 1 kW reference array

Is changing the panel angle worth it in Johannesburg?

Start with the fixed angle. Four seasonal changes model +71 kWh a year (+4.7%) for each 1 kW of panels. Changing the angle every month adds no modeled annual output beyond the seasonal strategy.

These are latitude-based planning estimates, not a supplier quote. The comparison isolates panel angle; adjustable framing, labour, safe roof access, shade, soiling, and warranty terms can change the practical decision.

Fixed tilt

No angle changes

Annual output / 1 kW: 1,503 kWh
Extra vs fixed: Baseline

Twice yearly

2 changes/year

Annual output / 1 kW: 1,526 kWh
Extra vs fixed: +23 kWh (+1.6%)

Seasonal

4 changes/year

Annual output / 1 kW: 1,574 kWh
Extra vs fixed: +71 kWh (+4.7%)

Monthly

12 changes/year

Annual output / 1 kW: 1,574 kWh
Extra vs fixed: +71 kWh (+4.7%)

Estimated annual production for each panel-angle strategy in Johannesburg
Strategy	Angle changes/year	Annual output per 1 kW	Extra vs fixed
Fixed tilt	None	1,503 kWh	Baseline
Twice yearly	2	1,526 kWh	+23 kWh (+1.6%)
Seasonal	4	1,574 kWh	+71 kWh (+4.7%)
Monthly	12	1,574 kWh	+71 kWh (+4.7%)

View the 12-month output values

Estimated monthly production in kWh for each 1 kW of panels.

Monthly production values for fixed, seasonal, and monthly angle strategies
Month	Fixed tilt	Seasonal	Monthly
Jan	148 kWh	163 kWh	163 kWh
Feb	136 kWh	149 kWh	149 kWh
Mar	131 kWh	131 kWh	131 kWh
Apr	121 kWh	121 kWh	121 kWh
May	100 kWh	100 kWh	100 kWh
Jun	85 kWh	94 kWh	94 kWh
Jul	90 kWh	99 kWh	99 kWh
Aug	103 kWh	113 kWh	113 kWh
Sep	126 kWh	126 kWh	126 kWh
Oct	149 kWh	149 kWh	149 kWh
Nov	155 kWh	155 kWh	155 kWh
Dec	158 kWh	174 kWh	174 kWh

Compare solar panel angles near Johannesburg

See how the recommended fixed angle changes across nearby cities and latitudes.

Browse all solar panel angle locations