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NorthernMonkeyGirl
Joined: 10 Apr 2011 Posts: 4626 Location: Peeping over your shoulder
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dpack
Joined: 02 Jul 2005 Posts: 46168 Location: yes
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Posted: Fri Apr 01, 22 2:39 pm Post subject: |
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lap top might be pushing it, no idea about cold boxes
my photo capable lappy ate a 120ah leisure battery in about ten hours
via an inverter to 240v ac and then its own transformer power supply lead to 19v to the internal battery and/or to the internal power converter thingys is wasteful
the less transformers and inverters the better, the 30%s soon add up
a panel, battery bank, usb feed has minimal losses and does work
350w would run quite a lot of low load stuff(assume you might get half or less of the 350w on warm dark days)
a thing to consider is cold boxes are not a constant load which can be a bit iffy with battery and inverter rigs, any motor will have a start surge regardless of its numbers on the booklet
led lights, usb charging etc seems a good way to use a low power and "free" supply that will fit in a van when you move
ps 350w is not much to play with once losses from transformation and transfer are factored in
i recon keep it low voltage from panel to load or go for a big rig and absorb the losses, the former is easy to move when you move
my stuff is 4 panels that fold up to about A4 size, they knock out quite a bit of usb voltage and power either direct or into the small battery bank and are fine for phones, kindles, lights, a aa aaa rechargeable batteries that fit many things
the battery bank inline is best as a cold sunny day does get a bit frisky on voltage
the whole kit fits cabin size luggage and has enough power for many low voltage things including the camera
less than 5 kg with loads of loose batteries, wires, plugs a good meter and a few bits of small tool kit in case wires do not fit and a couple of decent capacity battery bank in a box things for darkness etc
if you go that route get a battery bank as a buffer, a chip and a few cells in a box is far more expendable than a fried phone or tablet
do individual batteries direct with a proper charger
iirc my full kit was under £250, no improvisation so far, but i did get assorted plugs and wires etc that are compatible and worked the specs based on requirements(usb voltage and power, anywhere, for any "mouth", portable and with reasonable control gear built in)
for an often nomadic lifestyle, that sort of thing is far more sensible than trying to use a 240 v up and down for assorted big loads as a fixed rig
it will sort all the little things that waste power and money by going from 240v 50 hz to usb level or lower
check out folding solar panel camping usb look to spend a bit under £200 for a good one with a decent build quality, output and assorted compatibility,built in control gear and a few ports
they have gone up a bit, the cheap ones are carp rather than electric eels
they may have half the capacity on paper than the thing you mentioned but it is far more use than trying to power big stuff on a smallish stand alone rig that may run the things they mention for a smallish van
boat and van stuff is worth looking at, that one looks like a load of expensive kit that may not be the best use of PV investment as it is trying to bridge the gap between houser 240v and pv harvest at a small scale
the less boxes and wires the better
ps apparently my portable rig should power a modern low power standard domestic lappy until it got light again, i have not tried that yet
the one you spotted might have trouble with this pooter on a sunny day and even with 2 batteries unless they are surge capable like a car battery and slow use like a leisure battery even a normal size fridge might be an issue
sorry to ramble, work out what you should best invest in in terms of outlay and savings as well as harvesting some non fossil leccy where you need it
ps load end domestic stuff that fits in vans and boats is often made for that sort of thing
pps the pv that fits on top of vans etc is usually in tandem with harvesting 12v when the engine is running and a larger battery capacity would be wise |
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dpack
Joined: 02 Jul 2005 Posts: 46168 Location: yes
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NorthernMonkeyGirl
Joined: 10 Apr 2011 Posts: 4626 Location: Peeping over your shoulder
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Posted: Fri Apr 01, 22 5:22 pm Post subject: |
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Not rambling! All useful. I glaze over a bit with technical specs that don't "translate".
Looking at the constantly used things, I have some light and heat for reptilian critters, work laptop set-up including second monitor that stays plugged in, home laptop that is charged and drained, couple of charging gadgets, then built-in stuff (current house is all electric): fridge, freezer, kettle, oven, shower & fan, lights.
It didn't seem to make sense to convert solar to 230/240V with a transformer, then re-transform it back down through normal laptop adaptor.
I will keep pondering! |
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dpack
Joined: 02 Jul 2005 Posts: 46168 Location: yes
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Nicky cigreen
Joined: 25 Jun 2007 Posts: 9857 Location: Devon, uk
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dpack
Joined: 02 Jul 2005 Posts: 46168 Location: yes
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dpack
Joined: 02 Jul 2005 Posts: 46168 Location: yes
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Mistress Rose
Joined: 21 Jul 2011 Posts: 15932
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Slim
Joined: 05 Mar 2006 Posts: 6609 Location: New England (In the US of A)
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NorthernMonkeyGirl
Joined: 10 Apr 2011 Posts: 4626 Location: Peeping over your shoulder
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Slim
Joined: 05 Mar 2006 Posts: 6609 Location: New England (In the US of A)
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NorthernMonkeyGirl
Joined: 10 Apr 2011 Posts: 4626 Location: Peeping over your shoulder
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dpack
Joined: 02 Jul 2005 Posts: 46168 Location: yes
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Mistress Rose
Joined: 21 Jul 2011 Posts: 15932
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