Author Topic: Solar powered workshop - take two  (Read 9883 times)


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Re: Solar powered workshop - take two
« Reply #15 on: June 09, 2013, 12:19:55 PM »
They are proving to be very good. I didn't want to penetrate my new roof and the aluminium systems were a lot more expensive. I had even considered Unistrut, but that was still a more expensive option and it introduces galvanic coupling issues with the frames of the panels.
The angle of the bins is not optimal for my location, but it is still the best option for my needs.

G. Bates

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Re: Solar powered workshop - take two
« Reply #16 on: June 20, 2013, 04:01:13 PM »

Now we have build a DC disconnect box. Again, ABB came through with a good sized box. It's IP65 rating is not necessary as it will be inside, but it's perfect for the job.
Midnite make a really nice DC disconnect box, but it does not have enough DIN ways on a single side to meet my requirements.
This box lives inside and contains some staunch DC breakers. You must NEVER use AC rated breakers on DC systems. AC breakers do not have the arc extinguishing abilities that DC breakers do. AC rated breakers from your local Toolstation are remarkably cheaper, but they will make a fire, when opened, quicker that you can light your BBQ.
I have a 250A breaker for the inverter, a 100A breaker on the output of the Classic and a 63A breaker to the PV input of the Classic. All of these breaker are disconnecting breakers which makes it convenient for me if I need to switch certain circuits off manually.
The disconnect box also houses a 60A DC breaker which is the main breaker for all of my DC loads. Downstream of this breaker are six 600V fuses for each of the DC circuits which include home-brew LED lighting, computer, and security systems. There is also a circuit for the Victron BMV-600 battery monitor and an Arduido MEGA which grabs data out of the BMV-600 and reads some DS18B20 temperature sensors.

Arduino with ethernet board for posting to Cosm and a top PCB for connections.

I don't have a high capacity crimping tool for the 70mm˛ cables, so I cut a pocket out of a piece of aluminium stock on the mill. The pocket holds the connector snugly. I then proceeded to beat all seven shades out of the top of the connector with a hammer and nail punch. That connector is not coming off.

You are amazing. I have been looking for this topic. This is not just education but also relief for my projects..
« Last Edit: June 25, 2013, 08:34:17 AM by G. Bates »