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Is it a problem that my solar PV reads 280 volts?

Posted by Chris Rudge on 17 March 2017 at 4:50 pm

Is it a problem that my solar PV reads 280 volts?

Q. I have 12 solar panels, six facing east and six facing west. I have two inverters, one of which is a 'Sunnyboy', but I don't know which model. It was checked today and I was told its voltage is 281 when it should be around 240 volts. Is this a problem? Do I need something to reduce…

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Battery storage for solar PV: Which battery to choose?

Posted by Chris Rudge on 30 March 2016 at 12:55 pm

Battery storage for solar PV: Which battery to choose?

Battery storage bolt-on options for existing renewable energy generation systems are now becoming the next 'must have' for people looking to either reduce their energy bills or increase their energy security at times of power cuts. I have been providing different types of battery syst…

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Review of the SOLiC 200 Immersion Controller

Posted by Chris Rudge on 11 August 2014 at 9:06 am

Review of the SOLiC 200 Immersion Controller

In the quest to test as many of the current immersion heater controllers that let you use all your excess solar PV generated power, I got hold of a SOLiC 200 immersion controller to try out. My first impression was that unlike most of the other immersion controllers that are on the market, th…

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How closely should the input of an inverter match the output of a solar array?

Posted by Chris Rudge on 18 November 2013 at 10:31 am

How closely should the input of an inverter match the output of a solar array?

Q: How important is it to match the Max DC input of the inverter, to the maximum possible output of the solar array? Some companies have given me quotes where the output/input are miles different. A: It is standard procedure to install an inverter that is up to 20% lower in power rating than …

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Is all my solar electricity being exported?

Posted by Chris Rudge on 10 October 2013 at 9:22 am

Is all my solar electricity being exported?

Q: I suspect that all the generation from my 3.12 kW Solar photovoltaic panels is being exported as since installation almost 2 years ago my electricity bills have increased rather than reduced despite over 5,000 kWh being generated. How can I check this is the case? A: Any power be…

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Should I buy a device to store my solar generated electricity?

Posted by Chris Rudge on 13 September 2013 at 10:18 am

Should I buy a device to store my solar generated electricity?

Q: I have solar PV panels on my roof. There are now some devices becoming available that enable one to store the surplus electricity to use at another time, for example after dark. They are expensive to purchase though. How do they work; are they a good investment; and are there any models y…

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What happens to excess solar power when the batteries are full?

Posted by Chris Rudge on 20 June 2013 at 9:25 am

What happens to excess solar power when the batteries are full?

Q: I want to find out how my solar panels deal with excess solar power when the batteries are fully charged. It is a 24 volt system: 4 x 165 watt panels  into 2 kW inverter   stand alone system. A: As an off grid, stand alone system, I assume your power usage is quite low if the bat…

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Can I charge my tenants for solar generated electricity?

Posted by Chris Rudge on 28 May 2013 at 9:01 am

Can I charge my tenants for solar generated electricity?

Q: I have a property which is a farmhouse with attached barn conversion. I live in the barn and I rent out the attached house to tenants. The two properties are on one electric supply and we have PV array on the barn roof with meters in both properties so we can monitor who uses how much electric…

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Is my roof strong enough to take solar PV?

Posted by Chris Rudge on 25 March 2013 at 9:33 am

Is my roof strong enough to take solar PV?

Q: I live in an old stone cottage (c 1830) with roof rafters that I'm sure wouldn't pass current building regs for strength, even though they're not the original ones. The walls seem sound enough though. Would it be possible to put up a solar pv array that was supported on the 2 end w…

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Review of Amelec Intelligent Solar Switch

Posted by Chris Rudge on 17 December 2012 at 9:27 am

Review of Amelec Intelligent Solar Switch

For the cost, this looks to be really good value. The Amelec Eco2 Solar Switch is housed in a standard electrical housing such as used for consumer units and the like. As can be seen from the photo, it also has a standard DIN rail for fitting your selection of MCB/ RCD depending on application …

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