EHU surge protection

Newfie

Newfie

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What devices do you use to protect your motorhomes electrical systems from electrical surges/fluctuations whilst connected to an EHU supply.
Both in the UK and elsewhere.
 
Lenny HB did you hard wire it in or use the standard ehu connectors & use inline
 
Wired it between the mains inlet & consumer uint.

www.motorhomefun.co.uk

Lenny's Modding the new Gin Palace

Been at it a couple of weeks now on & off so I thought I would bore you all. First jobs, fitted the AVS30 Voltage protection unit, hardly ever use EHU, fitted this to the last van when we were doing a long ferry crossing as ships generators are not know for their stable outputs. Filtapac...
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Jimbohorlicks said:
Interesting, how does that work for under voltage?
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If the supply drops out of the preset range it turns of the output off and doesn't turn back on until the supply is back within limits and has stabilised.
Works the same way with over voltage.
The voltage range is user adjustable.
 
Newfie said:
What devices do you use to protect your motorhomes electrical systems from electrical surges/fluctuations whilst connected to an EHU supply.
Both in the UK and elsewhere.
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There's various devices at various prices. It depends on whether you want protection against spikes from lightning strikes, prolonged surges/dips from the grid supply, or voltage stabilisation no matter how the grid supply varies. The price also varies depending on the power you want. For example to protect a laptop charger is not expensive, to protect a water heater more expensive.
 
autorouter So do you have a recommendation to protect your Motorhome?

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Newfie said:
So do you have a recommendation to protect your Motorhome?
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I think for a typical motorhome the AVS30 described by Lenny HB and others is a very good compromise. It traps rapid spikes, and if the voltage goes too low or high it shuts off the power. For most motorhomes that's not a big inconvenience, most crucial things work with 12V and/or gas, and no mains power for a few hours is not a big deal.

If you wanted more protection - for mains medical devices that must remain on uninterrupted overnight, for example - then there are many other (more expensive) options. Most involve a charger, battery and inverter. For example Victron do a system that can plug in anywhere in the world (US or Europe, 50 or 60Hz for example) and can cope with what they call 'weak mains supply'.

Schaudt do an Overvoltage Protection module (OVP), which is incorporated in some of their Electroblocks (12V Distribution/fusebox), also available as an add-on. If you look at a map of lightning distribution across Europe, you will see they are located in a lightning hotspot, so it must have concentrated their minds a bit o_O :giggle:
 
Its Soooooo annoying to see The AV30 being listed at £7.83 plus shipping on Alibaba, it might take a year to arrive, there will be shipping & import tax to pay, but its just another example of how cheap these Chinese manufactured products actually cost, and the mark up UK suppliers put on them.:mad:
EG: Pump Express £122.40, E Bay supplier £167.18, RS Components £82.62 Inc Vat.:mad:
LES
 
Lenny HB . I assume the protector should be between the mains inlet and the RCD. What would you suggest as suitable settings for over and under voltage, I have noticed some sites may only be around 220v at normal times.
 
Reallyretired said:
Lenny HB . I assume the protector should be between the mains inlet and the RCD. What would you suggest as suitable settings for over and under voltage, I have noticed some sites may only be around 220v at normal times.
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Yes fitted mine between the inlet and the RCD. I can't remember what I set mine to probably low limit 190 or 200, high limit 250.
Sorry can't check I'm 6000 miles away from the van.

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Hi. I’ve been reading this and other recent related threads about surge, over & under voltage protection.
I’m off to France & Greece this summer and will be 50/50 on EHU/off grid and wondering if I should install an AVS30 on my new Adria and at what parameters would I set it?

The EBL(?) is a Nordelettronica NE350 and the manual mentions it has over and under voltage protection (277/170) but nothing about surge.

Thanks in anticipation of responses, as a new motorhome owner I find the forum discussions very informative 😊
 
TinaLes said:
Its Soooooo annoying to see The AV30 being listed at £7.83 plus shipping on Alibaba, it might take a year to arrive, there will be shipping & import tax to pay, but its just another example of how cheap these Chinese manufactured products actually cost, and the mark up UK suppliers put on them.:mad:
EG: Pump Express £122.40, E Bay supplier £167.18, RS Components £82.62 Inc Vat.:mad:
LES
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I ordered 3 x 100 amp lithium batteries from China which took 3 days to arrive in the UK (air freight). Mind you it took UPS four days to deliver them!
 
1679181698790.png

Ordered one of these, will it do the job?
Considered putting in a plastic box before hook up, outside
 
bubble63 said:
View attachment 728682
Ordered one of these, will it do the job?
Considered putting in a plastic box before hook up, outside
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Cheap Chinese junk, more likely to set your van on fire than protect it.
With all the add on costs probably leaves the factory gate at a quid or two, it won't meet any safety standards.
 
You could be right Lenny HB but where is most of the normal domestic electrical consumer unit gubbins produced?

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TinaLes said:
Its Soooooo annoying to see The AV30 being listed at £7.83 plus shipping on Alibaba, it might take a year to arrive, there will be shipping & import tax to pay, but its just another example of how cheap these Chinese manufactured products actually cost, and the mark up UK suppliers put on them.:mad:
EG: Pump Express £122.40, E Bay supplier £167.18, RS Components £82.62 Inc Vat.:mad:
LES
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I hope you are not suggesting what I think you're suggesting.
 
berni109 said:
You could be right Lenny HB but where is most of the normal domestic electrical consumer unit gubbins produced?
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There is no information on the company or any reviews on their products, would you really trust something that cheap to protect your system?
That unit sells for $15 in the states about £12, I like to buy cheap but I wouldn't risk it on a safety critical item.
Yes loads of electrical products made in China and the better ones the quality control is overseen but the distributor.
 
TinaLes said:
Its Soooooo annoying to see The AV30 being listed at £7.83 plus shipping on Alibaba, it might take a year to arrive, there will be shipping & import tax to pay, but its just another example of how cheap these Chinese manufactured products actually cost, and the mark up UK suppliers put on them.:mad:
EG: Pump Express £122.40, E Bay supplier £167.18, RS Components £82.62 Inc Vat.:mad:
LES
Click to expand...
Have you not seen this I posted on anther thread.
 
Aksp said:
Lenny HB Would appreciate your opinion on post 16 please
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As your unit has under and over voltage protection you could just fit a surge protector but they are dearer than the AVS30.

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The limits of the AVS as a standard are set for a window of 190-260 volts.
 
Although the AVS30 low & high voltage settings are adjustable I’m not sure you can do this accurately without
A device that is able to to deliver the voltages you actually want to set it at.
 
Lenny HB said:
I don't know how good the surge prtection is in the AVS30 I fitted it mainly for over/under voltage protection.
I would set it to 190/250.
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I don't know if you can really answer the following question given your reply above, but I will ask anyway :)

IF you had a setup that already dealt with over and under voltage (something the Victron Multiplus does), would you personally get the AVS30 anyway for the claimed Surge Protection (something the Victron Multiplus does not do as far as I am aware)?

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