Appreciate the input...Didn't consider a few of those things.
So the lamps are actually for sale, thus 230-240V is what I
need...these are my lamps:
http://www.wispandwillows.co.uk/lamps
I will be attending 2 markets in the end: The Ballater winter
market on Saturday 27th Nov and the Affa Fine market on 5th
November at Crathes..Spread the word!. Good point about the risk
assessment..Will bring it up in a scheduled conversation with the
organisers. AFAIK there won't be any space for my car at either
markets, but it's worth investigating.
Good point regarding inverters and leisure battery. Will have to test it, and use a good old style wolfram bulb instead, or carry a fridge for cool beers :-D
Cheerio,
Wouter
Do the lamps have to run from 240V? Are they just for illumination or are they the thing to look at and buy?
My experience is narrow boats and you would then use low voltage lamps running direct off 12V. Plenty of LEDs that will do that now a days.
Using and carrying a lead acid battery, key part ACID. You will need to box it and protect it.. Bigger risk is dropping something metal across the terminals.
If this is a formal market, i.e. Aberdeen St Machar the organisers will have a whole bunch of hoops to jump through from their risk assessment. So you do not want to get there and be told No to this, No to that.
Capacity:
For boating you reckon on no more than 50% drain from the battery, without affecting the life of the battery. So draining 2Amps for 10 hours takes you close to that. Also for that sort of load would be using a leisure battery and not a starter battery. Leisure battery designed for delivering small amounts of power over longer term. Narrow boats like motorhomes tend to be fitted with multiple batteries, a starter battery for the engine and one or more leisure batteries for the domestic side. e.g. https://www.eurocarparts.com/p/lion-leisure-battery-676-65ah-444776761. USed to use 4 110Ah Lesiure batteries for domestics.
Invertors: What is the efficiency of the invertor? At that low a load on it I could imagine it drawing 3Amps to deliver 20W, down circa 60-70%. Its real consumer grade electronics, built to a price not performance.
Will you have a vehicle next to you? Makes a good place to install a power source properly.
Lawrence.
On 13/10/2021 20:46, Wouter Piessens wrote:
Hey all,
Next month I hope to attend the first outdoor Christmas fair with my lamps, with a gazebo stand at Christmas market in Ballater. Unfortunately the fair does not have the possibility to have fun electricity to my stand, so I will need to source my own solutions. Since it is my first outdoor fair, I don't have a practical setup yet. So I thought to pass my ideas via this mailing list for second (and third, etc) opinions.
What are my needs:
1) 3 to 5 lamps on the table: Total 20-25 Watt consumption in total
2) Approx 8 hours electricity
Solution:
1) 40 Ah lead battery 12V: If my calculations are correct, 25 Watt at 12V would give me 2.08Ah, so a 40Ah battery should be sufficient . Something like this one :https://www.eurocarparts.com/p/lion-063-car-battery-3-year-guarantee-444770631
2) Use inverter to convert 12V DC to 230V AC https://www.ringautomotive.com/en/product/RINVU300
3) recharge the battery at home afterwards through an indoor charger.
Safety concern
This solution looks fairly simple, but is it really save to use this setup in outdoor environment? Are the crocodile clips that come with the inverter safe to use for hours? What other safety precautions should I take, to avoid accidents? And lastly, how does moisture affect the the performance of such a battery?
Looking forward to hearing your inputs on this. Would this setup with a lead battery work, or should I consider a higher density (but costlier) battery. I got 2 USB powerbanks lingering about (Total 20Ah), but no inverter from 5V DC to 230V AC (via USB ?)
Cheerio,
Wouter
-----------------------------
Wouter Piessens (Wisp & Willows) Find me at : http://www.wispandwillows.co.uk/ and https://www.etsy.com/uk/shop/WispAndWillows
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-- ----------------------------- Wouter Piessens (Wisp & Willows) Find me at : http://www.wispandwillows.co.uk/ and https://www.etsy.com/uk/shop/WispAndWillows
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