Poll

Voltage Optimisers

  •  
    1 vote (100.0%) for: Has anyone else had experience in the installation of voltage optimisers like matt:E. Do they work and give a better inverter performance or is it just an £800 gimmic

#1 Oct. 13, 2017 11:49:31

BackYardSolar
From: Surrey, on Gatwick flight path
Registered: 2015-05-30
Posts: 44
Reputation: +  0  -
Profile   Send e-mail  

Voltage Optimisers

Hi NoellEagen,

Welcome. You are correct any pure resistive load has to obey Ohm's law, so an optimiser is a waste of time and money.

The amount of time you have a motor running is so small, a voltage optimiser would never pay for its self and is only another thing to go wrong.

Voltage optimisers are a waste of money in a residential environment but could be worth while in a commercial environment.

Don't waste your money. Thats my advise.



SolarEdge SE4000 inverter, 16 x Romag powerglaz 235W panels. South facing at 30 degree angle in Surrey just East of Gatwick and under the flight path.

ESS AC coupled system using a Victron Multiplus 24V/1600VA Inverter/Charger - 8.16kW Trojan 875 battery bank.

Offline

#2 Oct. 14, 2017 17:20:40

pnews99@hotmail.co.uk
Registered: 2015-06-03
Posts: 18
Reputation: +  0  -
Profile   Send e-mail  

Voltage Optimisers

well back yard i was given one to try before i had pv and it resulted in a 7 per cent drop in electricity usage obviously since then with panels my bills are so low anyway , but if you can fit one cheaply Evan for domestic use they can save you money.

Offline

#3 Oct. 16, 2017 11:07:15

bhommels
Registered: 2011-10-03
Posts: 120
Reputation: +  0  -
Profile   Send e-mail  

Voltage Optimisers

That sounds much better than I was expecting. How long did you use it, and how long did you monitor your usage for? Do you have any more details about your home setup, what you have running continuously for example?
Many thanks, Bart

Offline

#4 Oct. 16, 2017 18:40:48

BackYardSolar
From: Surrey, on Gatwick flight path
Registered: 2015-05-30
Posts: 44
Reputation: +  0  -
Profile   Send e-mail  

Voltage Optimisers

I was going to ask that question, but I didn't want to get into “How did you arrive at 7%”.

You would have to have collected a lot of pre-optimizer data to make any comparison. Also you have recently had PV installed, so that would have complicated any comparisons considerably.

Also have you replaced any electrical appliances, LED's etc, recently for a more economical one?

I honestly believe it to be virtually impossible to make any accurate measurements unless you were running two identical systems in parallel for a very long time.

I have worked in the electrical industry all my life, Cable & Wireless, GEC telecoms, National Grid and Network Rail. I was a working electrician for many years and obtained a HNC in Electronics while working for National Grid. I just can't see how a device that is basically a voltage reducer/power factor corrector can save you any serious money in a residential environment.

Fitting a solar diverter to heat up your hot water or a night storage heater would save you more.

Sorry I just don't see it.



SolarEdge SE4000 inverter, 16 x Romag powerglaz 235W panels. South facing at 30 degree angle in Surrey just East of Gatwick and under the flight path.

ESS AC coupled system using a Victron Multiplus 24V/1600VA Inverter/Charger - 8.16kW Trojan 875 battery bank.

Offline

#5 Oct. 16, 2017 19:40:50

pnews99@hotmail.co.uk
Registered: 2015-06-03
Posts: 18
Reputation: +  0  -
Profile   Send e-mail  

Voltage Optimisers

This was the year before I had pv fitted,so yes I have only one years data where there was no other changes ,water was not heated by gas for that year but have now fitted diverter for radiator and water.
cfls changed to leds and all reasonable insulation done . appliances upgraded and use of a low wattage insulated kettle
With out going to a battery unit i can see no other changes which would lower power use and be financially viable
Though can only state the figures i got .I will let you argue with companies like mt

http://www.marshall-tufflex.com/pdfs/Voltage%20optimisation%20brochure%20-%20EY138.pdf
but remain open to any other ideas you can give me.

Offline

#6 Oct. 17, 2017 16:05:30

BackYardSolar
From: Surrey, on Gatwick flight path
Registered: 2015-05-30
Posts: 44
Reputation: +  0  -
Profile   Send e-mail  

Voltage Optimisers

This is my last post on this subject, as I don't want to get into a back and forth debate. You have been mislead by Marshall-Tufflex big time.

I only needed to read page 4 to see their con. Page four “The science explained” gives an example of Ohm's law based on a typical 240V supply compared to an optimised 220V supply reducing energy used by 17.4%. I agree if you drop the voltage you will use less power. The con is this, if you need 5kWh to heat your water each day, then you need 5kWh of power.

So using their example of a 20 ohm load on a normal 242V supply = 2982W power, so heating 5kW of water is 5000W/2928W = 1.708Hrs to heat the water.

Using an optimised supply of 220V on the same load is 2420W power, so heating 5kW of water is 5000W/2420W = 2.066Hrs to heat the water. So you use less power but it takes longer the result is the same 5kWh of energy to pay for.

You cannot escape the fact that you need 5kWh of energy to heat the water. So you save nothing at all it is a lie and a con.

I am sorry if you can't see the lie.



SolarEdge SE4000 inverter, 16 x Romag powerglaz 235W panels. South facing at 30 degree angle in Surrey just East of Gatwick and under the flight path.

ESS AC coupled system using a Victron Multiplus 24V/1600VA Inverter/Charger - 8.16kW Trojan 875 battery bank.

Offline

#7 Jan. 20, 2018 02:21:00

grekko23
Registered: 2018-01-20
Posts: 1
Reputation: +  0  -
Profile   Send e-mail  

Voltage Optimisers

The concept behind voltage optimisation is simple. In general, power from the National Grid is supplied at a higher voltage than necessary due to old electrical distribution networks in place which were designed to operate at higher voltage levels, as well as electricity suppliers being required to ensure all buildings are supplied voltage within set parameters.

If a building is being supplied at a higher voltage than necessary it will likely result in a mass of wasted energy, excessive levels of carbon emissions, patent tescili and higher than necessary electricity bills in addition to power quality issues, including increased wear and reduced lifespan of electrical equipment.

Offline

#8 Jan. 24, 2018 13:28:27

TAGWARE
Registered: 2014-08-19
Posts: 4
Reputation: +  0  -
Profile   Send e-mail  

Voltage Optimisers

https://en.wikipedia.org/wiki/Voltage_optimisation

A common misconception as far as Voltage Optimisation is concerned is to assume that a reduction in voltage will result in an increase in current and therefore constant power. Whilst this is true for certain fixed-power loads, most sites have a diversity of loads that will benefit to a greater or lesser extent with energy savings aggregating across a site as a whole

Offline

#9 Jan. 24, 2018 14:18:17

TAGWARE
Registered: 2014-08-19
Posts: 4
Reputation: +  0  -
Profile   Send e-mail  

Voltage Optimisers

Just to add fuel to this.

Ofgem report 2011.

https://www.ofgem.gov.uk/sites/default/files/docs/2011/12/energy-saving-trial-report-for-the-vphase-vx1_0.pdf

The average over multiple sites run under an SSE scheme was 5.1% saving.

They were looking to rolling these units out on a national scale. Similar to the current SMART Metering Rollout. The difference being that the VX1 actually would have saved energy.

Which frankly probably would have been the better way of spending our money than the current SMART Metering rollout.

Regards.

Offline

#10 Jan. 25, 2018 17:56:27

BackYardSolar
From: Surrey, on Gatwick flight path
Registered: 2015-05-30
Posts: 44
Reputation: +  0  -
Profile   Send e-mail  

Voltage Optimisers

Rubbish, a residential property has almost exclusively purely resistive loads, such as kettle, immersion heater, fan heater, electric oven/hob, even a washing machine or dishwashers greatest load is the internal heater.

I have worked in the electrical industry all my life.
I started out as an apprentice electrician in 1963 working for an electrical contractor. I then worked for GEC Telecommunication, Cable & Wireless, Network Rail and 17 years with National Grid. Apart from my City & Guilds Electrical certificates, I have a Higher National Certificate (HNC) in Electronics.

If you need 5kW of electricity to heat a tank of water, you can heat it faster at 240V or optimised lower at 220V, heating the water more slowly. But ultimately you will need 5kW to heat the water and will pay for 5kW at 240 or 220V, end of story.

Note: fans in the household often have synchronous motors so are dependant on the 50Hz frequency not the voltage, so they would have to work harder drawing more power to maintain their speed at a lower voltage.

Voltage optimiser have no place in a domestic environment.



SolarEdge SE4000 inverter, 16 x Romag powerglaz 235W panels. South facing at 30 degree angle in Surrey just East of Gatwick and under the flight path.

ESS AC coupled system using a Victron Multiplus 24V/1600VA Inverter/Charger - 8.16kW Trojan 875 battery bank.

Offline

Board footer

Moderator control

Powered by DjangoBB

Lo-Fi Version