I’m a little wary of plug-in solar in the US. Some of the bills propose allowing 1200 watt panels which can overload wiring depending on what else is on the circuit and how in the wall wiring is run. Limiting plug-in panel wattage to, say, 400 watts might be necessary
The problem isn’t when it’s done correctly, it’s when it gets half arsed by cheap Chinese suppliers. A lot of the corner cuts are not easily detectable to layman consumers.
The biggest is matching protection. The solar needs to shut down within ms of an RCD going (RCDs take 30ms). Otherwise it could continue to shock a victim, or risk a fire.
The most insidious would be to stop any with an “Off grid” mode. Grid workers already fear generators being backfed during a power cut. It turns cold lines live, with no warning. Having a switch to get your lights and TV working again would be far too tempting to too many people.
Speaking of the grid. One of the biggest issues is grid instability. Solar can do offline VERY quickly. Micro solar is even worse for this. Without major upgrades on the grid, it’s akin to having a small child “helping” you move heavy furniture up some stairs. In theory you’re better off. In practice you spend more resources countering the chaos than you save.
My personal view is that all new homes should have power feed in capabilities baked in at the mains entry point. It can then have proper cutoff/cutover capabilities, from fully approved parts. No chance of Chinese cheap crap killing people. It also puts the breakers back inline with the power. Home solar (balcony or rooftop), battery backup, generators all can be fed in via a known safe method.
A quick way to stop the use of cheap and unsafe products is to introduce legislation that has safety standards and a certification body like UL that they have to meet before they can be sold.
I totally agree that we have to put in some serious effort to make this a safe and workable thing. I’m not on the libertarian side of things where it’s like, “Pshh! Get the products out there and let the market figure it out!” because… I mean, geez, our housing situation is bad enough without burning down any more of them. But we do need the legislation to get us some movement. We need safe, reliable products that can at least compare with a first model year car in terms of operability and not perfection. We’re more than a decade behind in this area, we’re losing more ground by the day, our government is doing whatever illegal shit they can think of to try to stop it entirely, and we can’t afford this.
I fully agree. It’s the same over here in the UK.
The key is to get a (semi global) get of regulations in play asap. If China can’t sell them, then they won’t make the lower quality products. Unfortunately, getting them back out of circulation will be a LOT harder. The safety rules need to go in early.