{"uid":"cap_88i5NidymAFUcAS7Vmhnq","slug":"halowerk-solar-tilt-optimiser-4bd68e62","name":"Halowerk Solar Tilt Optimiser","description":"Evaluates clear-sky irradiance in the module plane for tilt angles from zero to ninety degrees on the fifteenth of each month and sums the days. Because it assumes a cloudless sky, the optimum leans slightly steeper than a real-weather optimum, where diffuse light from an overcast sky rewards flatter angles; in summer the difference is small, in winter months it reaches ten to fifteen degrees, so treat the winter figures as an upper bound.","url":"https://solar.halowerk.com/tilt-optimiser","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"lat":{"type":"number","maximum":90,"minimum":-90},"lon":{"type":"number","maximum":180,"minimum":-180},"year":{"type":"integer","default":2026,"maximum":2100,"minimum":1970},"albedo":{"type":"number","default":0.2,"maximum":1,"minimum":0},"azimuth_deg":{"type":"number","default":180,"maximum":360,"minimum":0},"elevation_m":{"type":"number","default":0,"maximum":6000,"minimum":-500},"tilt_step_deg":{"type":"number","default":2,"maximum":10,"minimum":1},"current_tilt_deg":{"type":"number","maximum":90,"minimum":0,"description":"Tilt in use today, for the loss comparison."}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.003","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.003/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_u-8xCbIB604pSlcpApR7p","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.003","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Computes the optimal solar panel tilt angle for a given location and year by evaluating clear-sky irradiance across all tilt angles (0–90°) and comparing against a current tilt to quantify energy loss.","exampleAgentPrompt":"What's the optimal tilt angle for my solar panels at latitude 48.8, longitude 2.3 (Paris), assuming a south-facing azimuth of 180°, ground albedo of 0.2, elevation of 50 meters, and my panels are currently tilted at 30 degrees — use a 2-degree step resolution for 2026?","exampleUseCases":[{"title":"Rooftop solar installation optimization","prompt":"I'm installing solar panels on my roof in Munich — latitude 48.1, longitude 11.6, elevation 520 meters, south-facing at 180° azimuth with an albedo of 0.2. What tilt angle should I use for 2026 to maximize annual yield? Use a 2-degree step and assume I'm currently at 35 degrees."},{"title":"Quantify loss from suboptimal tilt","prompt":"My solar panels in Cape Town are fixed at 20 degrees tilt — latitude -33.9, longitude 18.4, azimuth 0° (north-facing), elevation 10 meters, albedo 0.2. Can you calculate how much annual irradiance I'm losing compared to the optimal angle for 2026, using a 1-degree step?"},{"title":"Off-grid cabin solar planning","prompt":"I'm planning an off-grid solar setup for a mountain cabin at latitude 46.5, longitude 7.9, elevation 1800 meters. Ground albedo is about 0.4 due to snow. What's the ideal panel tilt angle for 2026 at a south azimuth of 180°, with a 2-degree resolution? I don't have a current tilt yet."}],"resultDescription":"Returns the optimal tilt angle (in degrees) that maximizes annual clear-sky plane-of-array irradiance, along with irradiance values across the evaluated tilt range. If a current tilt is provided, also returns the estimated annual energy loss relative to the optimum. Results reflect a clear-sky model evaluated on the 15th of each month; winter figures are upper bounds due to the absence of diffuse overcast-sky modeling.","failureModes":["Latitude or longitude out of valid range returns a validation error","Tilt step outside 1–10 degree range is rejected","Year outside 1970–2100 range is invalid","Albedo outside 0–1 is invalid","Clear-sky assumption means optimum may be 10–15° steeper than real-weather optimum in winter months","Elevation outside -500 to 6000 m range returns an error","Missing required lat/lon fields returns a 400-level error"],"whenToPreferThis":"Use this endpoint when you need a fast, purely geometric/astronomical estimate of the optimal solar panel tilt angle without requiring weather data or a forecast model. It is ideal for initial system design, quick feasibility checks, or comparing a current installation angle against the theoretical optimum. Prefer this over weather-based tools when simplicity, speed, and low cost matter more than cloud-cover accuracy. It is particularly well suited for locations with predominantly clear skies (e.g. deserts, high altitudes), where the clear-sky assumption is a close approximation to reality.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-13T18:42:03.731Z","isFirstParty":false}