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Solar powered workshop?
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Woodburner



Joined: 10 Apr 2008
Posts: 311


Location: Deepest Essex, well, a village...

PostPosted: Sun Feb 02, 2014 7:49 pm    Post subject: Solar powered workshop?  Reply with quote

I know lights can be done quite easily, but what about power tools? I don't have anything really heavy duty, just a typical drill, mitre saw and such, although, looking up the wattages, I'm beginning to think it's a non starter.    
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12Bore



Joined: 07 Oct 2011
Posts: 8153


Location: Paddling in the Mersey

PostPosted: Sun Feb 02, 2014 7:56 pm    Post subject: Reply with quote

Lots of leisure batts and a big inverter, I can't see it working TBH
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Woodburner



Joined: 10 Apr 2008
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Location: Deepest Essex, well, a village...

PostPosted: Sun Feb 02, 2014 8:29 pm    Post subject: Reply with quote

From something I just read, it seems car batteries would be more appropriate for intermittant high load.    
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Justme



Joined: 10 Feb 2007
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Location: Pwllheli

PostPosted: Sun Feb 02, 2014 11:49 pm    Post subject: Reply with quote

Woodburner wrote:
From something I just read, it seems car batteries would be more appropriate for intermittant high load.    



But not for very long or to a deep discharge.
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bodger



Joined: 10 Feb 2007
Posts: 32908


Location: Ever so slightly around the bend.

PostPosted: Mon Feb 03, 2014 6:21 am    Post subject: Reply with quote

Obviously some power tools have use a heavy amount of electricity but then things like cordless drills have been around for some time now, so maybe there are some other tools that could be powerd by solar power?
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sod
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Joined: 18 Dec 2007
Posts: 13374


Location: Masterton New Zealand

PostPosted: Mon Feb 03, 2014 9:17 am    Post subject: Reply with quote

We looked into it and best we came up with was solar and as bodger said all rechargable then a geny for heavy gear. so didn't bother
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escape



Joined: 25 Aug 2010
Posts: 723


Location: Swindon, Wiltshire

PostPosted: Fri Feb 07, 2014 1:30 pm    Post subject: Reply with quote

Forklift batteries are one of the best you can use.
But they are not cheap :(
And you would need a few to power anything for any length of time
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Justme



Joined: 10 Feb 2007
Posts: 1939


Location: Pwllheli

PostPosted: Sat Feb 08, 2014 4:53 pm    Post subject: Reply with quote

escape wrote:
Forklift batteries are one of the best you can use.
But they are not cheap :(
And you would need a few to power anything for any length of time


They are quite heavy too. One of ours weights 1200kg & the other 600kg.
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Woodburner



Joined: 10 Apr 2008
Posts: 311


Location: Deepest Essex, well, a village...

PostPosted: Sun Mar 02, 2014 2:41 pm    Post subject: Reply with quote

Oops, thought I posted ages ago, after sod's post.  
Basically, would have said, thanks for posting, I think I'll forget about it too.  
Just seen there was a 'new' name on the last post so looked again.

A quick google  does indeed reveal that forklift batteries are prohibitively expensive, but make me think of mobility scooters.

How on earth do their batteries cope?    
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sod
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Joined: 18 Dec 2007
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Location: Masterton New Zealand

PostPosted: Sun Mar 02, 2014 7:45 pm    Post subject: Reply with quote

Scooter batteries are just same as ones used in campervan/boats as the motor just draws small amount and no sudden heavy load. Basicly we found that "deep Cycle" ones have light plates so they can give long small power but if heavy loaded break down. Heavy "car" ones give big power and need big charge or the heavy plates build up with rubbish and die also as said they don't like being discharged. There is a new type of battery out but don't know much about them other than the old battery chargers want charge them properly as they charge at 13.6volt and you need 14.8volts so we have just bought a new charger and found it has sorted s few batteries out  
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Woodburner



Joined: 10 Apr 2008
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Location: Deepest Essex, well, a village...

PostPosted: Sun Mar 02, 2014 9:11 pm    Post subject: Reply with quote

Interesting info about chargers, and batteries, thanks, but what I don't get is that surely a scooter needs a lot more power than any of my hand tools, and for longer too.    
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Woodburner



Joined: 10 Apr 2008
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Location: Deepest Essex, well, a village...

PostPosted: Sun Mar 02, 2014 9:20 pm    Post subject: Reply with quote

Ok have looked into them a bit more, and am still puzzled. how come a 340W motor can move a *ahem* heavy person uphill, or at 6mph but it takes a 1kw motor to drill a hole in a bit of pine?      
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Justme



Joined: 10 Feb 2007
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Location: Pwllheli

PostPosted: Mon Mar 03, 2014 9:38 am    Post subject: Reply with quote

Would be a big hole to need 1000 watts.

My hand drill is more like 150 watts. Even my pillar drill is less than 400 watts.

Or are you meaning the bats that are 1 Ah?

If you think about a pro cyclist that can do about 100 watts constantly then 300 watts for an elec motor is loads.
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Woodburner



Joined: 10 Apr 2008
Posts: 311


Location: Deepest Essex, well, a village...

PostPosted: Mon Mar 03, 2014 12:05 pm    Post subject: Reply with quote

Hmm, I admit mine is overpowered for 99% of what I ask of it, but I find that lesser drills don't last as well. Also when I would really need the power it would be drilling in the walls of the house, so would have mains supply. Do they draw less power when they don't have a load?

Or maybe I could get away with a low power one, just make sure it never gets used for anything heavy duty iyswim. ?
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sod
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Joined: 18 Dec 2007
Posts: 13374


Location: Masterton New Zealand

PostPosted: Mon Mar 03, 2014 8:34 pm    Post subject: Reply with quote

How about my draw saw that is 1400w   and to answer you yes they only draw full power under load. think of a lorry at idle little fuel at full load lota fuel. Not meaning to insalt you just sometimes I find it better to relate. Just checked one  power drill is 840watts. One other way to go if only odd times you need big drill is to go battery gear, there is a lot of great stuff out there now Gareth is another fan of them as are we. We do have a genny so we can use power tools away and helps when power cuts  


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