One collection. Every engineering step.
From early PV system sizing to structural pole design, from lighting simulation to TCO & CO₂ comparison, from container loading to battery health — every Open Solar Design calculator lives here. Each tool runs 100% in your browser, no installs, no sign-ups.
Jump to Category
Category A — PV System Design
Everything you need to size the electrical side of your off-grid solar lighting system: panels, batteries, controller, PV strings, autonomy and daily energy balance.
A1 · Solar Panel Power Calculator
Calculate required PV panel wattage from daily consumption, peak sun hours and system efficiency.
A2 · Battery Capacity Calculator
Size your battery bank by daily load, autonomy days, DoD limits and operating voltage.
A3 · Energy Balance Calculator
Verify daily solar generation vs. nightly load consumption for energy self-sufficiency.
A4 · Solar Autonomy Days Calculator
Estimate how many cloudy days your battery bank can carry the load without sunlight.
A5 · Battery Runtime Calculator
Predict runtime under continuous load for a given battery bank capacity and DoD.
A6 · Solar Charging Time Calculator
Calculate the charge time needed to refill your battery bank at the given panel wattage.
A7 · Solar Controller Sizing Calculator
Select the proper charge controller current rating for your PV array + battery bank.
A8 · PV String Configuration Calculator
Find the series/parallel configuration that matches battery voltage and controller limits.
A9 · Solar Energy Yield Calculator
Estimate monthly and annual PV energy yield from panel power, PSH and system loss.
Category B — Pole, Foundation & Structure
Structural tools for every step of the pole installation: concrete foundation, wind resistance grade, cable, grounding, bending moment check, reinforcement steel and hardware.
B1 · Concrete Pedestal Foundation Calculator
Design a concrete foundation that satisfies overturning, uplift and sliding checks.
B2 · Pole Wind Resistance Grade Calculator
Verify pole wind load rating against target wind speed and exposure.
B3 · Cable Sizing Calculator
Compute cable cross-section by current, one-way distance and voltage-drop limits.
B4 · Grounding System Design Calculator
Size the grounding electrode and conductor for safe lightning & fault dissipation.
B5 · Pole Bending Moment & Stress Check
Calculate pole bending moment, shear and section stress under lateral load.
B6 · Concrete Volume & Cost Calculator
Estimate concrete volume, cement/sand/aggregate weights and material cost.
B7 · Rebar Quantity Calculator
Estimate total rebar length, weight and cost from cage layout drawings.
B8 · Anchor J-Bolt Layout Design Calculator
Design J-bolt pitch circle, number of bolts, diameter and spacing on the base plate.
B9 · Steel Pole Weight Calculator
Calculate tapered or straight steel pole weight from material grade and dimensions.
Category C — Lighting & Optics
Optical tools to get exactly the right light-on-ground: panel tilt, shadow mask, lux/lumen conversion and area coverage planning.
C1 · Optimal Tilt Angle Calculator
Find the best solar panel tilt angle from latitude and target season.
C2 · Shadow Analysis Calculator
Check mask angle and no-shadow spacing between poles for a given sun altitude.
C3 · Lumens to Foot-Candles Converter
Convert lumens to lux and foot-candles by mounting height and beam pattern.
C4 · Lighting Coverage Calculator
Compute how many poles are needed for a site, given target lux and pole spacing.
Category D — Economic & CO₂ Analysis
Make the business case for solar: compare TCO against diesel generators, count carbon savings, and build multi-year ROI numbers.
D1 · Economic Analysis Calculator
Build multi-year cash flow, simple payback and IRR for your solar project.
D2 · Solar vs Diesel TCO Calculator
10-year total cost of ownership side-by-side for solar and diesel generators.
D3 · Diesel vs Solar CO₂ Comparison
Quantify CO₂, NOx and PM reductions when switching from diesel to solar.
Category E — Material & Logistics
Quote faster, ship smarter: roll up a full project BOM price, and optimize how the order fits into containers.
E1 · Material Cost Calculator
Estimate total BOM cost by line items, quantity, unit price and exchange rate.
E2 · Container Loading Calculator
Plan 20ft / 40ft container packing: count units per container and shipping load.
Category F — LED & Battery Tools
Fine-tune the two most-tuned items in the field: LED driver schedule and battery charge/discharge behaviour.
F1 · LED Energy Consumption Calculator
Map LED driver profiles (dimming, PIR, midnight cut) into daily Wh consumption.
F2 · Battery C-Rate Calculator
Confirm whether your battery discharge C-rate is within manufacturer specifications.
F3 · Battery State of Charge Calculator
Track open-circuit-voltage → state-of-charge for LiFePO₄ and lead-acid batteries.
At a Glance
| Total Calculators | 30+ |
| Platform | HTML5 Web App — runs in any modern browser |
| Download / Sign-up | None required, 100% client-side |
| Languages | 28 locales via top language menu |
| Engineering Categories | PV · Structure · Lighting · Economics · Logistics · Battery/LED |
| Standards | IEC 61215, IEC 62548, AS/NZS 4509.2, IEC 61724-1 |
Frequently Asked Questions
Are the calculators free to use?
Yes. Every calculator in this collection runs 100% in your browser — no registration, no installation, no credit card.
How do I use these tools on-site?
Just open the page from your phone or tablet — all calculators are responsive and work offline once loaded. If you need something custom (branded tools or IoT telematics), contact us from the quote page.
What engineering stage does each category cover?
A PV System Design: early electrical sizing. B Pole & Foundation: structural and civil engineering. C Lighting & Optics: photometric design. D Economic & CO₂: business case and bidding. E Material & Logistics: quotation & shipping. F LED & Battery: O&M and field tuning.
Can I share the results?
Every tool exposes the computed result on-screen so you can take a screenshot or copy the values. Screenshare / print-save works natively through your browser.
Thank you for choosing Open Solar Design