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Inverter Power,Help needed [Archive] - Event Photographer Society Forum


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Mark Ratcliffe
14-06-2010, 04:57 PM
im doing a charity shoot for a local childrens hospice,This is a hospice for end of life,ive done bits before for them,day entails fun run,"Skunk Petting" thats the animal not the smoky stuff .so they were looking at selling pics to kids & Mums On The Day
im trying to print on site,cant take a petrol genny and as this is a one off thought i could stretch to a 12v converter
what sort of power would i require to run
1 pc hp workstation xw 6000 ,this was an ebay purchase so no idea of power usage,cant use my laptop as its caputt
1 mitisubishi cp9550dw,cant find any power usage manual
any advice Would Be appreciated
Ta Mark :idea:

Mark Ratcliffe
14-06-2010, 04:58 PM
should have said it in a local nature reseve hence no genny

Alan Warner
14-06-2010, 05:50 PM
If you switch to a laptop you will lower your power requirements by a massive amount,

you can run a laptop off of a large leisure battery on a 150w Inverter, when you add the printer to the mix the requirements are a lot higher when actual printing (around 250w peak springs to mind)

Powering the printer all day would no be practical as it would mean a great number of leisure batteries (3-6)

You could power on & off the inverter & printer/laptop charger up to print maybe a run of prints switching off when done,

Using the laptops internal battery to keep things going in between print runs, not awfully practical but if your job s a one off maybe viable...


Mark Ratcliffe
14-06-2010, 06:04 PM
ive seen a 1000w for 90,i can get my car to the area im printing at,so could i kick the car engine in every 15 mins to juice the battery up,i agree boot everything up every 15mins run of the prints ,frame,i only use 6x 4s for their charity dos,so for the cost i could run em all of only run at 12/13p each,then frame to order
think ill have a look at that laptop
Thanks al,for advice on wattage etc

14-06-2010, 06:31 PM
i tried a 600w invertor for a lp top and a mitsi 9800 , totally inadequate and tripped the invertor whenever i tried to print.
Can't remember the calculation off the top of my head, System Insight did it for me, but 600w wasn;t enough at peak draw.

Alan Warner
14-06-2010, 06:54 PM
Trouble is inverters are often quoted with BullShi7 figures and the quoted 1000w figure is a peak and not a constant draw figure may equate to a measly 400-600w.

Mitsubishi printers & the like are pretty meaty & draw heavily on an inverter at time of printing but have a low standby,

trouble is the inverter is drawing from the battery at fairly constant rate so a powerful inverter will require more battery power,

A lot to think of for one off job, would they consider an LPG generator ?


Andy Starkey
14-06-2010, 08:34 PM
I'd be guessing that most of the nature reserves will have a 'coffee shop' or some other shack with power. Might be worth a pre-emptive phone call or visit.

Unless of course you already know the answer is no!

Richard Chaff
15-06-2010, 02:40 PM
i tried a 600w invertor for a lp top and a mitsi 9800 , totally inadequate and tripped the invertor whenever i tried to print.
Can't remember the calculation off the top of my head, System Insight did it for me, but 600w wasn;t enough at peak draw.
The power supply on our laptop states 1.5 amp so I'll use that for sake of argument; the average 9x6 dye sub seems to be about 2.4 amp when printing, and around .5 amp when not.

If you add a customer-facing screen at .5 amp (120W) then when printing you have 1.5 + 2.4 + .5 = 4.4 amp, x 240V = 1056W, but it may peak a little more at the moment the printer motors start.

You may wish to use a 24V set-up and inverter and to make the inverter a pure sine wave output.

Here is a link to inverters, power meters, deep-cycle batteries.

Hope this helps.

Mark Ratcliffe
15-06-2010, 02:52 PM
thanks richard,i think im going to leave the inverter,as its charity event ill point them in the direction of photobox to order from a gallery ill create for them
i can now see how the sums add up.in the past 3 occassions ive hired a 2.8kv petrol genny run through power surge sockets and run printer ,2 viewing screens and Pc Server with no problems,ive paid out 90 total for three hires up to know, so maybe its time to look at purchase
thanks Again

Alan Warner
15-06-2010, 03:00 PM
I think it a wise decision to bypass the on-site printing, I wouldn't invest for a one-off job

Just give out flyers to all & sundry...


Andy Starkey
15-06-2010, 07:53 PM
Slight disagreement with Alan here, (apols Alan),

If the need fits then on-site is the plan. How many people, what sort of event? If these two add up to the posibility of onsite sales then if it is profitable do what's needed.

Things I'd think about.

USP - do they have a specialist wildlife (petting type thing) centre, where you could get picture of children/groups with animal/birds/lizzards etc. The sort of thing that mum/dad/carer couldn't get with their compact.

I'm not suggesting you do go down the on-site printing, but the thing is there is nothing like a captive market so if the photo/business model fits then go for it, but not a risk of a major loss.

Also don't forget the upselling side of attending a new or different event if done well. It's relatively cheap marketing.

Just my thoughts.

gary evans
15-06-2010, 08:48 PM
I use an invertor with a laptop and Hi-Touch 730 printer without any problems.

Mark Ratcliffe
15-06-2010, 09:14 PM
All Valid points re awareness,this is a charity do,ive done work for them before,this is a freebie,but as mentioned the guy who is coming along has skunks.meercats.racoons,and at his base he has birds, owls etc,

ive already planned with the organiser that we will get the mums,kids&animals in photos,my thoughts are to see if i can work along with the Pet Guy in the future,his daughter runs a face painting business,im hoping this may be a way in to a bit of reasonably easy work,i have a feeling that he has schools attend his base,so there could be potential there,im already crb checked for the charity so that helps,strange enough they have asked me to cover an event in July,with the County police dog trainers,so a little more experience for me there,ive only moved to outside event work in the last month.so as you note its all about getting my name/number out there

i always do a raffle for a free portrait shoot and a 8x10 + some 6x4s.The hospice is 10 mins from my home,the winner attends there,i set my lights backdrop up do the pics done in a few hours.always weekdays,the upside is i get the email address's of entrants,allowing me to offer/advertise vie email at no cost

Alan Warner
15-06-2010, 09:32 PM
Andy, your pretty much right in what you say,

My concern How much will need to be spent to achieve a workable solution,

I'm just being realistic on this kinda Job, financial loss or lots of headaches or embarrassment and setup costs are just so risky for a one off event,

Gary is correct a few years ago we did a large Country fair using the Hi-ti 710 & laptop setup, (power requirements are much greater with the 9800)

1st day the system worked really well until we had exhausted the three large batteries & we still had stuff to print, we did however manage to plug into the burger vans generator and print off what we had sold,

On the second day we just switched on printer to do a print run every hour or so & just managed to get away with it,

END RESULT : loads of stress & financial break even after paying rent & buying Invertor & 3x Leisure batteries !

Just my previous experience on this one,

Job is worth doing just need lateral thinking....


Alan Warner
15-06-2010, 09:42 PM

Looks looks you've got most angles covered, Are you sure that there is no any way you can set up maybe in a Visitor center or maintenance garage or borrow a milk float :D ...


Mark Ratcliffe
21-06-2010, 11:28 AM
Just A quick update from the weekend,.purchased a 2.8k generator,ran via power surge etc,
Now Have On e For The Future!
negatives of attending NONE
Loads of interest from public re their company dinner dances etc,private partys,best of all met an events organiser who obviously puts themed nights together,he has apart from the evening type stuff
A pretty impressive set up consisting of
a team of face painters,balloon modellers,Clowns ,bouncy castles,merry go rounds,birds of prey etc,he watched me work & was impressed at speed from portraits to print In Hand time!
Speed of prints really does get em talking,i know now i can run one of these quite easily on my own,low exs,high margins.
Chance of working hand in hand with the events chap,seem good
I took My marque and Back drop,set up as on-site portraits,lucky for me weather was perfect creating a lovely diffused light in marque,just moved my portrait chair within marque for best results,shot with no flash until about 8.30
so all in all a good day
oh and s for hospice. :diff:

Mark Ratcliffe
21-06-2010, 11:44 AM
just a quick one in case you though how can you get a reasonable sized portrait out of a marque,i shot from outside the front of marque,so the whole area within was the "studio"
got a team shot of Break dance group (15 Members) in and photographed
dont think i can post image !
oh the :HDG: van did smell tho,keep 100yrds away next time

Mark Ratcliffe
21-06-2010, 11:48 AM
http://farm5.static.flickr.com/4031/471 ... 2b52_b.jpg (http://farm5.static.flickr.com/4031/4718344246_c71b032b52_b.jpg)

Mark Ratcliffe
21-06-2010, 12:04 PM
http://farm5.static.flickr.com/4027/471 ... 0e8c_b.jpg (http://farm5.static.flickr.com/4027/4717699223_596d9f0e8c_b.jpg)