Everyone promises a percentage. Here you get the number: what you stop paying the utility and what bill is left, worked out across the twenty-four hours of the day with your town’s sun and your appliances one by one — not a yearly average.
And because the whole day gets run, out comes the thing nobody else works out: whether there is power when the grid goes down, and how many days in a row you last without it.
It is a solar simulator and a panel and battery calculator at once: instead of a yearly estimate, it runs the twenty-four hours of the day against your real consumption and tells you whether the system makes it to the next morning.
The simulator tells you which path yours takes from the inverter output in kW AC: up to 25 kW it is the Expedited Registration under Act 17-2019, and above that the process changes. That comes free, with the rest of the calculation.
The whole route is in the guide to filing with LUMA: the seven steps of the Expedited Registration — the account number, the inverter’s UL 1741 SB certification, the PREPAEE portal, the diagram certified by a licensed engineer with a CIAPR stamp, the attachments, the 30 days LUMA has to answer, and the inspection with the swap to a bidirectional meter — and what to do when they do not answer: the 30 days can be claimed, a denial with no written reason cannot be appealed, and if LUMA does not settle the complaint it goes to the Puerto Rico Energy Bureau. It comes with the Professional plan.
Four pages where the number is not written down: it is run through the same engine as the simulator.
Calculating is free: the whole system hour by hour, how many days it lasts, and sharing by link. The Professional plan is $75 a month, or $60 a month paid yearly, and it includes the MPPT split, roof weight and area, battery compatibility, the LUMA filing guide, your own prices and the PDF with your logo for the engineer.
For installers, licensed electrical engineers and homeowners in Puerto Rico who want the numbers before they spend.
This is for comparing scenarios. It does not replace the design of a licensed electrical engineer.