Sun Pumps Calculators

Calculators coming soon

Solar water systems depend on real-world variables like TDH, voltage compatibility, water demand, panel sizing, and site conditions. We’re refining the tools now.

For now, give us a call and we’ll help size the right system for your application.

Pump calculators · 4 tools

The math, before the call.

Same calculations our engineers run on the phone. Use them to ballpark your spec — then call us with the numbers and we'll confirm or refine.

Inputs

Tell us about the herd.

120 head · 30 gal/day each
45 head · 15 gal/day each
8 head · 12 gal/day each
Calculated demand
0 GPD design target · with reserve
Base demand 0 GPD
Climate adjustment ×1.15
Reserve multiplier ×3
Recommended pump

SDS-D-228

Best fit for 0 GPD demand. Confirm well depth on the next tab.

Sanity check: compare against actual herd consumption from your existing trough flow if possible.
Inputs

Build up the head equation.

140 ft
28 ft
20 ft
420 ft
Total dynamic head
205 FT TDH · DESIGN VALUE
Static head 140 ft
Drawdown +28 ft
Vertical lift +20 ft
Friction loss (420ft @ 1") +17 ft
Pump matches: SCS-180 (medium head, helical).
Inputs

Compare against running a generator.

$8,500
65%
$85/mo
Net out-of-pocket
$2,975 after EQIP cost-share
System cost $8,500
NRCS reimburses (65%) −$5,525
5-yr generator avoided cost −$5,100
Payback period
0.7 years

Pump pays for itself in 0.7 years vs. continuing to run a generator. Useful life: 15–20 years after that.

Inputs

Pick the pump, we'll size the panels.

Recommended array
6 × 265W
1,590W Total
9,222 Wh Daily yield
2P3S Config

Wired 2P3S (2 parallel × 3 series). Vmp ≈ 90V, Imp ≈ 17.6A. SP-MPPT-60 controller compatible.

Open-circuit voltage runs ~22% above Vmp on cold mornings — confirm controller Vmax rating before finalizing.

Send a screenshot. We'll respond by EOD.