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Combiners, manual transfer switches, PV interactive Disconnects: A Boring Bunch of Boxes.

If you’re going to use more than one inverter to power your home or business you might know what I’m talking about, and if you’re doing a three phase system with three inverters than you almost certainly do. There’s a lot more to building a multi-inverter system than buying inverters and batteries. They need to […]

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The DC side

The panels are the part people photograph. The rack, the neat rows, the glint of glass — that’s the money shot. But the decisions that actually make or break a solar build often happen in the unglamorous space between the array and the inverter, where a calculation you get wrong can cook a $3,000 inverter

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Are MC4 connectors safe?

Panels fail almost never unless you do something stupid to them. Inverters mostly die of old age or a lightning hit. The part that actually burns solar arrays down is the one nobody photographs and everybody underestimates: the little plastic connector on the end of the wire. It’s the cheapest component in the whole system

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Free Watts From the Ground: Boosting Bifacial Gain With What Was Already on My Pallets

In the last post I got 30 bifacial panels mounted straight and neat on the Chiko rack. But a bifacial panel is only half-installed when the modules are bolted down, because the whole point of paying for glass on both sides is the light that comes up from underneath — and that depends entirely on

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Setting 30 Panels on a Chiko Ground Mount: What the Manual Doesn’t Tell You

My particular installation might serve as a useful guideline for yours, even if you elect to do a DIY rack. For various reasons I decided not to do mine DIY, mostly because I was concerned that I’d need an engineering stamp to pass local codes and land use planning requirements. Perhaps I actually didn’t. When

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How the EG4 18kPV Knows the Grid Is Down — and Why It Doesn’t Need a Transfer Switch

If you’ve ever installed a backup generator, you know the drill: the generator can’t just be wired into your panel alongside the utility. You need an automatic transfer switch (ATS) — a big mechanical relay box that physically flips your home between “grid power” and “generator power” so the two sources can never touch. The

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New Rules

This is what I posted on Facebook: New plan. I’ve been considering pumping my solar channel by doing better videos. But that means less getting stuff done and more screwing with videos. So no. Instead I’m going to do short posts to ExpertAmateur.com, my blog, showing what I’m up to, and short, crappy videos with

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A little build it your way demo: Smarter Presence Detection with the Sonoff SNZB-06P– A $15 Sensor That Makes Your EMS Work Your Way

This is a demonstration of how you can work with the EMS system to have it precisely suit your needs. We’re getting closer to a release for the system. If you can’t wait for the tested and proven version and want to start playing around let me know in the comments of the included video.

A little build it your way demo: Smarter Presence Detection with the Sonoff SNZB-06P– A $15 Sensor That Makes Your EMS Work Your Way Read More »