All Solar Calculators

Free tools for solar panel sizing, tilt, voltage, wiring and cost.

• Caravan, Motorhome & Camper Trailer Solar Calculator
  Free Australian caravan solar calculator: enter daily Wh, peak sun hours and battery type — get panel wattage, battery Ah, MPPT controller and inverter size for caravans, motorhomes and camper trailers.
• Solar Rebate Calculator (STC + State)
  Free solar rebate calculator for Australian homeowners. Estimate the value of your STC point-of-sale discount, state rebates (VIC Solar Homes, NSW Empowering Homes, SA Home Battery), and the new Cheaper Home Batteries Program.
• Solar Panel Replacement Cost Calculator (Australia)
  Free Australian solar panel replacement cost calculator. Estimate per-panel labour, materials, CEC recycling fee and call-out cost and compare against a full new CEC install.
• Hybrid Solar System Calculator
  Size a hybrid solar and battery system for Australian homes: PV kW, battery kWh, hybrid inverter rating, and STC rebate impact. CEC-aligned defaults.
• How Many Solar Panels Do I Need?
  Free Australian calculator to size your solar system. Uses CEC-aligned irradiance, average household consumption (6,500 kWh/yr), and 440 W panel specs typical of 2026 installs.
• Off-Grid Solar System Calculator (Australia)
  Free Australian off-grid solar calculator. Sizes PV array (kW), battery bank (kWh), and inverter (kW) from daily kWh load using BoM irradiance data and CEC-aligned design factors.
• Solar Feed-in Tariff Calculator (Australia)
  Calculate your annual solar FIT revenue under Australian state schemes. Free 2026 calculator with VIC 3.3c, NSW 4.9c, QLD 6c, SA 4.3c, WA DEBS 2.5c rates.
• Solar Feed-in Bill Savings Calculator (Australia)
  Calculate your annual electricity bill savings under Australian solar feed-in tariffs. State-by-state FIT comparison, DMO retail rates, and battery economics for 2026.
• Solar Roof Vent Calculator
  Size a solar roof vent from your roof-space area and target air changes. Australian calculator with NCC vent area, fan power, and payback math.
• Solar Charge Controller Size Calculator
  Size a PWM or MPPT solar charge controller for any off-grid array in Australia. AS/NZS 5033 / 4509 sizing, 12 V / 24 V / 48 V banks, free.
• Solar Fuse Size Calculator
  Free Australian solar fuse size calculator. Calculate gPV string fuses and battery DC fuses sized to AS/NZS 5033 and AS/NZS 5139 for PV and storage installations.
• Solar Panel Output Calculator (Australia)
  Free Australian solar panel output calculator. Estimate daily, monthly, and 25-year kWh production from your array, sun hours, and system efficiency — plus dollar savings.
• Solar Pool Heating Calculator
  Size a solar pool heating system for Australian climates and estimate annual savings vs gas or heat pump. Free calculator with CEC and Clean Energy Council guidance.
• Solar Panel Dust & Soiling Loss Calculator (Australia)
  Estimate annual energy lost to red dust, salt spray and ash on Australian solar panels. Calculates baseline soiling loss, kWh recovered by cleaning, and whether a paid clean pays back at your feed-in tariff.
• Solar Panel Savings Calculator (Australia)
  Free solar panel savings calculator for Australian homes. Estimate 25-year lifetime savings using your annual generation, retail rate, state feed-in tariff, self-consumption, and price escalation.
• Solar Inverter Size Calculator (Australia)
  Free Australian solar inverter sizing calculator. Enter your kW DC array and target DC/AC ratio — get inverter kW AC, clipping loss, and CEC compliance check.
• Solar Pool Pump Calculator (Australia)
  Size a solar-powered pool pump and PV array for an Australian backyard pool. Calculates flow, pump wattage, panel size and electricity savings vs your existing mains pump.
• Cost of Solar Panels Calculator (Australia)
  Free Australian solar panel cost calculator. Estimate after-STC installed cost from your monthly kWh, peak sun hours, A$/W, and STC rebate. 2026 Clean Energy Council and SunWiz data.
• Solar Carport Calculator (Australia)
  Free Australian solar carport calculator. Price the steel canopy + PV + EV charger, see annual savings and 25-year benefit. CEC + AS/NZS 4777 ready.
• EV Charging Calculator (Australia)
  Free EV charging calculator for Australian drivers. Estimate kWh drawn, charge time on a 7.4 kW single-phase wallbox, electricity cost at 2026 retailer rates, and savings from charging via rooftop solar.
• Solar Electricity Bill Savings Calculator (Australia)
  See exactly how much your monthly power bill drops after going solar in Australia. Free calculator with 2026 AER DMO rates, state feed-in tariffs, STC rebate and Cheaper Home Batteries built in.
• Solar Generator Sizing Calculator (Australia)
  Size a portable solar generator for Australian camping, 4WD touring and outage backup. Calculate battery Wh, inverter W and panel input W with AU sun-hour data.
• Solar Investment Tax Credit Calculator (Australia)
  Free commercial solar investment tax credit calculator for Australian businesses. Estimate STC point-of-sale discount, Instant Asset Write-Off, Division 40 depreciation, and net cost after every business incentive.
• Microinverter vs String Inverter Calculator
  Compare microinverter vs string inverter cost, yield, payback and 25-year ROI for Australian residential solar in 2026. Enphase IQ8 vs Fronius Primo vs Sungrow.
• Solar Water Pump Calculator
  Size a solar water pumping system for livestock, irrigation, or rural water in Australia. Free calculator with state-by-state PSH and CEC-aligned sizing.
• EV Charging Cost Calculator (Australia)
  Australian EV charging cost calculator at 2026 AER residential rates. Per-session and annual cost on a 7 kW single-phase wallbox plus rooftop solar offset for the lower-east states.
• Solar Carport Cost Calculator
  Free AU solar carport cost calculator. Break down Colorbond structure, footings, CEC-approved PV, inverter, labour, DNSP fees, and EV charger in Australian dollars.
• Solar Panel Azimuth Calculator (Australia)
  Calculate the precise annual production loss when your Australian solar array deviates from true north. Free 2026 azimuth calculator with APVI-validated math, controlled-load and ToU split, and AUD lost-generation value.
• Solar Self-Consumption Calculator (Australia)
  Free 2026 calculator showing how a battery lifts solar self-consumption from 30% to 70%+ in Australia. Compare savings against state feed-in tariffs (NSW, VIC, QLD, SA, WA, ACT, TAS, NT).
• Solar Irrigation System Calculator
  Size a solar irrigation system for Australian horticulture and broadacre using ETo, Clean Energy Council PV data and CSIRO crop coefficients.
• Solar Panel Estimate Calculator
  Free solar estimate calculator for Australian homes. System size, annual generation, cost after STCs, year-1 bill savings under your DMO/VDO tariff, payback, and 25-year lifetime savings. 2026 Clean Energy Council and AER data.
• Solar Panel Payback Calculator (Australia)
  Free solar panel payback calculator for Australian homes. Estimate the year your rooftop system breaks even using your installed price, STC rebate, AER Default Market Offer rate, and feed-in tariff.
• Solar Panel Temperature Coefficient Calculator
  Calculate the power, voltage, and current derate your PV module sees at any cell temperature. Free 2026 calculator using the IEC 61853-2 NOCT thermal model with CEC-aligned defaults for Australian climate conditions.
• Solar Panel Warranty Calculator
  Free calculator for the minimum kWh a solar panel manufacturer guarantees at year N. CEC-approved modules, linear and stepped warranty curves, lifetime kWh floor in AUD.
• Solar Battery Bank Sizing Calculator
  Free Australian solar battery bank sizing calculator. Size your bank in Ah and kWh for off-grid stations, sheds, or grid-tied storage with hybrid inverters.
• Solar Battery ROI Calculator (Australia)
  Calculate the 2026 payback, 10-year NPV and ROI of a home battery in Australia. Free calculator with the Federal Cheaper Home Batteries Program 30% rebate, AER feed-in tariffs, and CEC-approved install costs.
• Solar Greenhouse Calculator
  Calculate the PV system size and annual energy to run a heated Australian greenhouse. Free calculator with CEC-grade U-values and STC-adjusted payback.
• Solar Loan Calculator (Australia)
  Free Australian solar loan calculator. Estimate the monthly repayment, total interest, and year-1 net cash flow on a financed residential PV system using current 2026 lender APRs and state feed-in tariffs.
• Solar Panel Bypass Diode Calculator
  Size PV module bypass diodes to AS/NZS 5033:2021 and AS/NZS 4777.1, and estimate annual kWh lost to substring shading on Australian rooftops.
• Solar Panel Cleaning Cost Calculator (Australia)
  Free Australian solar panel cleaning cost calculator. Estimate per-clean, annual and 25-year cost in AUD, plus payback verdict at local power rates.
• Solar Panel CO2 Savings Calculator (Australia)
  Estimate annual and lifetime CO2 emissions avoided by your Australian solar PV system, net of embodied manufacturing carbon. Free 2026 calculator using Clean Energy Regulator NGER 2024 grid factors and IEA PVPS Task 12 LCA data.
• Solar Panel Degradation Calculator (AU)
  Estimate Australian solar panel output decay with first-year LID and annual degradation rates. Free CEC-aligned calculator for 25-year cumulative kWh.
• Solar Panel Hail Resistance Calculator
  Free hail resistance calculator for Australian PV. Compute hailstone impact energy by diameter and tilt, compare to IEC 61215 Class 3–5 and CEC module list ratings.
• Solar Panel ROI Calculator (Australia)
  Free solar panel ROI calculator for Australian homes. Estimate payback, lifetime savings, and IRR using your STC-rebated cost, FiT, and self-consumption rate.
• Solar Panel Tilt Calculator (Australia)
  Free Australian solar panel tilt calculator. Get the best fixed angle for year-round, summer or winter generation across every state and capital city.
• Solar Panel Wind Load Calculator
  Free solar panel wind load calculator for AU installs. Compute uplift on a PV array against AS/NZS 1170.2 with Type 17 screw withdrawal demand in N/m² and N.
• Solar Cable Size Calculator (Australia)
  Free Australian solar cable size calculator. Enter voltage, current, and cable run length to get the smallest copper cross-section that meets AS/NZS 3000 and AS/NZS 5033 voltage drop limits.
• Solar String Sizing Calculator
  Work out the maximum and minimum solar panels per string for any inverter. AS/NZS 5033 cold-Voc and MPPT-window calculator, free.
• Solar System Efficiency Calculator (Performance Ratio — Australia)
  Calculate your PV system's Performance Ratio from kW DC nameplate to AC kWh delivered. Free 2026 Australian calculator with Clean Energy Council-aligned defaults for soiling, temperature, mismatch, cabling, inverter, and availability losses.
• Solar Panel Fire Rating Calculator
  Free fire rating calculator for Australian rooftop PV. Combines IEC 61730 module type and AS/NZS 1530.3 roof rating to return the system fire class, BAL bushfire compliance and NCC 2025 Part 3.7.1 verification.
• Solar Panel Monitoring ROI Calculator
  Free calculator for the payback and lifetime return on adding SolarEdge, Enphase, Tigo, Fronius, Sungrow or Huawei monitoring to an Australian residential solar system. CEC, NEM, AS/NZS aligned.
• Solar Panel Row Spacing Calculator
  Free calculator for the minimum spacing between rows of tilted solar panels to avoid June-solstice self-shading at Australian latitudes. CEC Design Guidelines-compliant 9am–3pm solar window.
• Solar Inverter Clipping Calculator
  Estimate annual energy clipped by inverter saturation, the net economic value of oversizing the PV array, and the optimal DC/AC ratio for AU irradiance and state feed-in tariffs under AS/NZS 4777.2.
• Solar Irradiance Calculator (GHI / DNI / DHI → POA)
  Free solar irradiance calculator for Australian sites. Convert GHI / DNI / DHI to plane-of-array (POA) energy. Defaults from BoM Solar Atlas + APVI Solar Mapping Service.
• Solar Panel Charge Time Calculator (Australia)
  Free Australian solar panel charge time calculator. Work out how many sun hours or days your solar array needs to recharge a deep-cycle, caravan or off-grid battery.
• Solar Panel Flood Damage Calculator
  Estimate immersion damage, expected annual loss, and 25-year cost for ground-mount and rooftop solar arrays across ARR2019 1%, 0.5%, and 0.2% AEP zones.
• Solar Panel Orientation Calculator (Australia)
  Free Australian solar panel orientation calculator. Enter latitude, roof azimuth and pitch — see annual yield versus optimal due-north for your postcode.
• Solar Panel Roof Load Calculator
  Free solar panel roof load calculator for Australian homes. Compare PV array dead load against AS/NZS 1170.1 imposed roof actions in kg/m², CEC-aligned.
• Solar Voltage Drop Calculator (Australia)
  Free Australian solar voltage drop calculator. Enter system voltage, current, cable length and mm² to see drop. AS/NZS 3000 and AS/NZS 5033 compliant.
• Solar Tracker vs Fixed-Tilt ROI Calculator
  Compare single-axis tracker vs fixed-tilt installed cost, STC-claimed yield boost, payback and 25-year ROI for Australian residential and small-commercial PV in 2026.
• Solar Panel Shading Calculator
  Estimate annual kWh and feed-in tariff revenue lost to partial shading on your Australian solar array. Free calculator with topology-specific models.
• Solar Bifacial Gain Calculator (Australia)
  Estimate the rear-side bifacial gain for an Australian PV system from bifaciality factor, albedo, mounting height and GCR — and convert to extra kWh and AUD value at CEC tariffs.
• Solar PV Earthing & Earth Conductor Size Calculator (AS/NZS)
  Size the earth conductor and module-frame bonding for an Australian residential PV array per AS/NZS 5033:2021 and AS/NZS 3000 Table 5.1. Free copper / aluminium lookup.
• Solar Panel Installation Angle Calculator (Australia)
  Free Australian solar panel installation angle calculator. Compare your roof pitch to the latitude-optimal angle for Australian conditions, see annual yield loss, and find the tilt frame size needed for low-pitch and flat roofs.
• Solar Panels kWh Calculator
  Free solar panels kWh calculator for Australia. Enter your monthly kWh use, target offset, and panel wattage to see system size, panel count, and bill savings — calibrated to BoM and Clean Energy Council standards.
• Solar Panel Recycling Cost Calculator
  Estimate the cost of recycling decommissioned solar panels in Australia in 2026 dollars. Includes Victorian landfill ban impact, CEC stewardship scheme, transport, and material rebates.
• Solar Panel Saltwater Corrosion Calculator
  Calculate ISO 9223 corrosivity category, lifetime reduction and 25-year extra cost for solar panels installed on Australian coastal properties. Built on IEC 61701 and CEC marine guidance.
• Solar Panel Snow Load Calculator
  Free Australian solar panel snow load calculator. Compute roof snow loads to AS/NZS 1170.3 with per-fixing shear demand in kN/m² and N for alpine NSW, VIC, and Tasmania sites.
• Solar Permit Cost Calculator (Australia)
  Free Australian solar permit cost calculator. Estimate DNSP grid connection, CEC accreditation, council DA exemptions, and compliance inspection fees by state.
• Agrivoltaics Yield Calculator
  Calculate combined PV and crop revenue from an Australian agrivoltaic site. Free tool using Clean Energy Council data and ABARES crop margins per hectare.
• Solar Thermal vs Solar PV for Hot Water (Australia)
  Compare solar thermal hot water vs solar PV + heat-pump for Australian homes. Free calculator with CEC-listed costs, STC rebate and payback by climate zone.
• Solar Lease vs Buy Calculator (Australia)
  Free Australian solar lease vs buy calculator. Compare cash, financed, and PPA / SunSaver-style structures over 25 years using current 2026 STC rebates, CEC-aligned pricing, and AER feed-in tariff data.
• Solar Panel Lightning Protection Calculator
  Estimate annual lightning strike probability, 25-year damage cost and the AS/NZS 1768 protection level for rooftop and ground-mount solar PV in Australia and New Zealand.
• Solar String Mismatch Calculator
  Work out the power lost when solar panels of different current or wattage share one series string. First-principles I–V mismatch maths, free.
• Solar Panel Snow Loss Calculator (Australia)
  Estimate annual energy lost to snow cover on Australian PV systems by tilt, latitude and snowfall. For NSW/Vic alpine and Tas highland installations.
• Solar Panel Soiling Loss Calculator
  Estimate annual energy lost to soiling on Australian solar panels from PM2.5, red dust, salt spray, and pollen. Compare rain-only vs paid cleaning ROI.