g/solar

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g/solar • Posted by u/roof_mount_ray • 1 months ago

Grounding and bonding on a residential rooftop solar system — AC and DC side

Working through NEC Article 690 for the first time on a new install. The DC side grounding requirements are the part that's confusing me. Specifically: 1. Do I need equipment grounding conductors (EG...

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g/solar • Posted by u/string_inverter_sarah • 1 months ago

NABCEP exam — worth it early in your career or wait for more experience?

I'm 2 years into solar installation, mostly residential string systems with some light commercial. I'm considering the NABCEP PV Installation Professional exam. From those who have it — is the certif...

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g/solar • Posted by u/battery_backup_brad • 1 months ago

Best way to document shading analysis for a permit application?

Some AHJs in our area are now requiring a shading analysis to be submitted with permit applications for solar installs. I've been doing shade analysis informally with a Solmetric SunEye for system des...

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g/solar • Posted by u/string_inverter_sarah • 1 months ago

Enphase IQ8 micros in partial shade — real-world production vs SolarEdge optimizers

Did a side-by-side comparison for a customer who had quotes from two installers — one recommending IQ8 microinverters, one recommending SolarEdge HD-Wave with optimizers. Site has partial shade from ...

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g/solar • Posted by u/battery_backup_brad • 1 months ago

Tesla Powerwall 2 not charging from solar during grid outage — backup gateway config?

Installed a Tesla Powerwall 2 with Backup Gateway 2 last month. Works great during normal grid operation — charges from solar and discharges per the set schedule. During a grid outage test, the Power...

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