Interactive ray-tracing, microinverter AC backfeed, and branch circuit breaker safety simulator for apartment living.
At 800W AC max backfeed on 120V line, injected current is 6.67 Amps. On a 15A breaker, this is well within safe busbar headroom provided non-dedicated branch loads do not exceed wire ratings.
This balcony solar workbench is a simplified computation, not a validated installation or safety assessment. It estimates irradiance, applies panel and inverter factors, and separates generated power from power used at home. The useful lesson is how its equations connect. Some source rules are inconsistent with its physical labels, so we will identify those limitations explicitly. At the saved twelve thirty setting, the source computes thirteen point two degrees of elevation, approximately three hundred thirty four watts DC, and three hundred twenty two watts AC. The inverter factor is zero point nine six five, followed by an eight hundred watt ceiling. Because the computed AC is below that ceiling, the displayed clipping is zero. These are model outputs rather than measurements. The household baseline load is two hundred twenty watts. Self consumption is the smaller of generated AC and that load. From three hundred twenty two generated watts, two hundred twenty are assigned to self use, leaving one hundred two as surplus. The displayed self consumption rounds to sixty eight percent. Raising baseline load changes this split without increasing generation. Now move from twelve thirty to exactly noon. The bar compares the two computed AC outputs, not a continuous physical power curve. At noon this source uses sine of pi, which yields zero elevation. Its low elevation rule then returns zero DC and AC. That contradicts the comment describing noon as peak sunlight. This zero comes from the current formula, not actual noon solar production. Finally, the page and export use different daily projections. The page sums half hour power samples and self use over the modeled day. At default it displays three point eight six generated kilowatt hours and two point three one self used. The exported daily estimate instead multiplies the instantaneous AC by five point two hours: at default one point six seven kilowatt hours, and at noon zero. Do not treat those outputs as interchangeable forecasts.