How does Sunnyplans rank parcels for solar suitability?

Each parcel gets a SunnyScore from a model trained on the geographic features that distinguish built solar farms from unbuilt land — slope, irradiance, distance to grid infrastructure, and similar signals. Parcels are then filtered to those with at least 5 contiguous flat acres outside protected areas and wetlands, and ranked by SunnyScore.

What does "qualifying parcel" mean in Pennington County, South Dakota?

A qualifying parcel has at least 5 contiguous flat acres (slope under 5%) and no overlap with federal protected areas or mapped wetlands. 42 of 52 parcels in Pennington County, South Dakota currently meet that bar.

Solar Land for Sale in Pennington County, South Dakota

42 of 52 solar-suitable land parcels in Pennington County, South Dakota. Flat 5+ acres, no protected areas, no wetlands. Ranked by SunnyScore.

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qualifying parcels of 52 total

0.97

top SunnyScore in Pennington County, South Dakota

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distillate 3 (pending model explainability)

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distillate 4 (pending model explainability)

Interactive map Explore 42 qualifying parcels in Pennington County, South Dakota Layer-first filtering · SunnyScore ranking · constraint overlays

Top 25 parcels by SunnyScore

#	Acres	$/acre	List price	City	ZIP	SunnyScore
1	11.2	$54,799	$615,364	Rapid City	57701	0.97
2	7.8	$109,816	$853,324	Box Elder	57719	0.96
3	22.4	$33,226	$743,579	Hill City	57745	0.93
4	8.4	$19,708	$166,209	Rapid City	57703	0.93
5	6.3	$42,315	$267,496	Rapid City	57703	0.92
6	4.0	$92,964	$370,900	Box Elder	57719	0.92
7	9.1	$34,230	$311,496	Rapid City	57703	0.91
8	16.5	$33,276	$547,740	Rapid City	57701	0.86
9	6.8	$31,345	$213,151	Rapid City	57703	0.86
10	7.5	$77,083	$575,788	Rapid City	57702	0.75
11	10.3	$26,930	$277,534	Rapid City	57703	0.75
12	7.5	$39,269	$295,976	Rapid City	57702	0.74
13	9.4	$31,689	$296,744	Rapid City	57703	0.60
14	5.7	$9,940	$56,962	Gateway Dr Lot Box Elder	57719	0.53
15	7.3	$35,523	$260,892	Rapid City	57703	0.50
16	10.2	$17,139	$174,420	Gateway Drive Lot Box Elder	57719	0.47
17	6.4	$13,728	$87,867	Gateway Dr Lot Box Elder	57719	0.45
18	6.0	$20,245	$122,443	Gateway Drive Lot Box Elder	57719	0.45
19	6.1	$14,255	$86,622	High Bluff Dr Lot Box Elder	57719	0.45
20	5.5	$16,858	$93,261	Gateway Drive Lot Box Elder	57719	0.40
21	5.5	$124,759	$682,780	Rapid City	57701	0.39
22	2.4	$134,425	$324,225	Hill City	57745	0.38
23	5.8	$13,257	$77,222	High Bluff Dr Lot Box Elder	57719	0.34
24	5.9	$15,433	$91,620	High Bluff Dr Lot Box Elder	57719	0.27
25	5.9	$9,885	$58,198	High Bluff Dr Lot Box Elder	57719	0.20

View all 42 qualifying parcels in the live map →

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