Written by Lisa Walsh

Solar Monitoring

Homeowners can see how their daily sunshine dollar is spent

Most homeowners who have invested a tidy 20 – 30K in a whole-house solar electric system want some idea of exactly how much, and when, their solar system is generating energy. This is true especially given the fact that most solar systems in Maryland, DC, Virginia and surrounding area are grid-tied. The solar electric system provides a large portion, though generally not ALL of a home’s electricity, with the balance coming from the traditional energy provider (BGE, PEPCO, etc.) during periods of high usage and/or low sunshine levels. So most customers still receive an electric bill, albeit greatly reduced. An online solar monitoring system keeps the homeowner plugged in to how much energy they are receiving from the sun versus their utility “back-up”.

The monitoring system is tied to the Inverter… (An inverter, by the way, converts DC power to usable AC power.)

SES often uses Enphase Microinverters in residential solar electric systems. This is our preferred monitoring system for a variety of reasons, including simplicity, cost-effectiveness, and customer support. With this system, each panel has its own inverter and associated monitoring. In contrast, solar systems that use only one inverter for the whole array do not have the ability to monitor performance of individual panels; just the entire as a whole. Microinverters, convert, quantify, and record the DC to AC energy conversion on each individual panel, independent of the other panels. These microinverters come with the Envoy Enlighten monitoring system. The homeowner simply clicks on a link from on their computer or Smartphone to see live readout of their current system power generation along with a robust record of historical data. Both the homeowner and system installer are notified when Enphase detects issues such as a panel or inverter failure (a rare occurrence), communication issues or shading (due to tree growth etc.), enabling a speedy remediation. Fortunately, true solar panel/inverter issues are few and far between, if at all, keeping the monitoring system employed at its optimum job: counting the rays of sunshine that power your home.

About Lisa Walsh

With over ten years in the solar industry, several of which have been in a core role with SES, Lisa’s role has developed into all aspects of originating, analyzing, and pre-qualifying prospective residential and commercial solar interests. This includes site feasibility studies, budgetary costs analysis, project financial planning and contract execution. Her role also extends into post-sale project management and oversight to insure a smooth, turnkey project.