Start here · your energy budget
Build a complete system
Solar · sizing and placement
02Solar panel sizeHow many watts of solar you need for your daily energy use and sun hours
03Solar panel outputDaily, monthly and yearly kWh your array will actually produce
04Solar panel angleBest tilt for your latitude, season and mounting
Batteries & storage
05Battery bankAmp-hours needed for your loads, autonomy days and battery chemistry
06Battery runtimeHow long a battery runs your load, usable capacity included
07Battery charge timeHow long your bank takes to charge at a given current
08Series and parallelWhat voltage and capacity your wiring arrangement produces
Inverters, controllers & wiring
09Inverter sizeContinuous and surge watts your AC loads demand
10Charge controller sizeMPPT or PWM amp rating your array and battery voltage require
11Solar wire gaugeAWG size that keeps voltage drop inside target, with fuse sizing
Conversions
12Watts to ampsConvert power to current at any voltage, with fuse sizing
13Amp hours to watt hoursConvert Ah to Wh and kWh, rated and usable
Backup power & fuel
14Generator sizeRunning and starting watts your loads need, altitude included
15Generator fuel useGallons per hour and runtime at your actual load
16Propane usageGallons per day and how long a tank lasts
Electric vehicles
17EV charging timeCharging time at home or on a fast charger, taper included
18EV charging costWhat a charge costs at your rate, per session and per kilometre
Costs & payback