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SOLAR ebike Trip Planner 2.1
Instructions, help and discussion on the Endless Sphere forum
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To use your own numbers, you must select File > Make a copy... from the menu above. (You may be asked to sign in with a Google account.)
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Then, change the yellow highlighted cells to your own values.
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EASY MODE
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Where are you?
How big is your solar panel?
Your daily solar range in May
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Oakland, CA100watts38 miles (62 km)
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ADVANCED
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Percent of sun-hours travelling with...
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LocationStart dateEnd datePV array sizeWh/milePV lossesShading losses0° fixed tilt1-axis tilt travelling North-South1-axis tilt travelling East-WestStationary charging
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Oakland, CAJan 1Dec 3110016.010%30%50%0%0%50%
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Enter a city name. If you get an error it's likely your location couldn't be found. Try selecting a different weather dataset below or a different location above.Double-click the yellow cells above for a pop-up calendar or enter dates manually in the format shown. The year does not matter but both dates must be in the same year.Enter the STC rating of your solar panel(s) in DC watts (Wp)Click the arrow to enter either Wh usage or daily range. The other will be calculated below.Wire/connection ohmic losses, diodes, charge controller efficiency, system availability, etc.Enter your best estimate: trees, buildings, cars, terrain, self-shading, etc.Set this to 0% if your array is tilted while moving.Estimate the amount of travel in each direction. You will rarely travel in a straight line all day. Set both to 0% if your array does not tilt when moving. Assumes 2-axis tracking by manually orienting the solar array.
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Weather datasetBatteryV aveV minV maxAh
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NSRDB (try me first!)37.030.042.016.2
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OUTPUTS
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For your date range:Trip lengthAverage daylightAverage
Wh/day
Average
miles/day
0° fixed tilt1-axis tilt North-South1-axis tilt East-WestStationary charging
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365days11.8 hrs38424.0Sun-hours2.5 / 50 / 6.80 / 6.14 / 7.9
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LocationCalifornia16Min1.0MinPeak watts88919796
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Latitude, longitude
37.81, -122.26
652Max40.8MaxPeak current2.9A (0.2C)3A (0.2C)3.2A (0.2C)3.2A (0.2C)
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Average watts25353140
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Highest ambient temp
43 to 95°F
Average current
0.7A (0C)0.9A (0.1C)0.8A (0.1C)1.1A (0.1C)
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Lowest ambient temp
34 to 63°F
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Max cell temp161°F
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Average daily Wh by month:
Composite daily averages based on your inputs above:
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MonthFixed 0° tilt1-axis NS travelGain vs. fixed 0° tilt1-axis EW travelGain vs. fixed 0° tilt2-axis trackingGain vs. fixed 0° tiltAverage
miles/day
Combined daily Wh50% each day w/ 0° fixed tilt0% each day travelling NS w/ 1-axis tracking0% each day travelling EW w/ 1-axis tracking50% each day stationary charging
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January14220544%25076%290105%13.52167100145
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February19627239%29450%34677%16.92719800173
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March27437436%34024%42354%21.834913700212
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April37750835%4129%53642%28.545618800268
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May43258034%4576%59638%32.151421600298
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June45761635%4846%63238%34.054422800316
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July44559534%4736%61338%33.152922300306
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August40055037%4338%57844%30.648920000289
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September32445139%38820%50255%25.841316200251
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October24636549%36047%45083%21.734812300225
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November16725553%30382%363118%16.62658300182
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December12719654%25298%298134%13.32126400149
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Annual29941538%37124%47057%24.038415000235
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