A Brisbane researcher has alleged serious security vulnerabilities in a Sungrow inverter. Sungrow are not happy with him.

Update: patch available – see end of story

A few months after I wrote about security in the home renewables space, a Brisbane engineer bought a Sungrow SH5k-20 inverter, decided to “poke around”, and claims to have turned up a crop of serious security vulnerabilities. [Read more…]

How do you get an SMA inverter to talk to Tigo Optimisers? Sometimes with great difficulty it seems.

Update: see SMA response at end of story. It’s time to chase up another customer experience, courtesy of Sharon, who contacted us because her SMA-Tigo installation turned into a saga. [Read more…]

De-energising a solar system can be dangerous if done incorrectly.

Alliance Solar doesn’t seem to have a media manager, and that’s a problem, because we reckon a bit of crisis communications will be in order. SolarQuotes emailed the company at its only public address, the ubiquitous info@ format, because its website doesn’t mention a media contact.

Why? Because a solar power system owner has posted tales of exploding kit in their reviews of Alliance Solar. [Read more…]

If your inverter sees a grid voltage that is too high for too long, Australian Standards mandate it disconnects from the grid. Before the voltage is so high it disconnects, your inverter may also reduce its power output in response to high grid voltages.

There’s a lot of fear-mongering about how the rise of renewables threatens our power grids, but a real problem getting real attention from the industry is how voltage rises on our mostly old and inflexible infrastructure stops customers from getting the most out of their solar PV installations. [Read more…]

If you’ve been reading the tech press this week, you’ve probably noticed there’s a lot of noise about a security vulnerability in Bluetooth, known as “KNOB”, and I thought it gives us the chance to discuss Bluetooth security in the solar business. [Read more…]

Is your solar power system at risk of hacking?

Last week’s post about solar inverter security sparked a lot of interest and a few good questions I’d like to answer; starting with one from TJ that reminded me people are justifiably and genuinely worried. [Read more…]

Want your inverter to wirelessly control some smart plugs? It ain’t easy…

This week’s post was inspired by a question asked by Malcolm via e-mail:

“Do you know of any ‘Smart” home systems/software that can be used with a Fronius Inverter/Smart Meter to direct surplus solar power to home appliances and/or heaters via smart wifi plugs?”

It’s a good question, and one that doesn’t yet have very many good answers. [Read more…]

And you thought the election was a shock result…

I have good news.  PVEL —  a standards testing company — has released a solar inverter scorecard.  It describes how a dozen different tests were performed on a variety of inverters and which were the top performers [Read more…]

Spat over inverter review intensifies as SolarEdge go legal.

At 3:15pm on Christmas Eve, when most Australian families were kicking back with a drink and looking forward to at least 2 days with family, friends and no work worries, Mark Cavanagh¹, owner of the highly regarded solar installation company, MC Electrical² received a five page letter from lawyers acting for $1.6 billion Israeli inverter manufacturer, SolarEdge. [Read more…]

There are a few things you need to know if you are getting a 3-phase solar inverter and expect to add a battery later.

I love three-phase solar inverters.

If your home has a three-phase supply and you do not want or need micro-inverters then my recommendation is to use a three-phase solar inverter over a single-phase model. [Read more…]