Managed to retrieve an old extension lead to run a 4" angle grinder, but at 710watts the inverter cut out after 1/10th second so I'm researching inverters that will do 1Kw
Looks like a Victron may be good especially as maybe 'Made in India'
http://www.windandsun.co.uk/products/Inverters/Victron-Inverters/Victron-Inverters :: windandsun.co.uk/ . . . /Victron-Inverters
VP-12/1200 Victron Phoenix 1200VA, 12V in, UK Outlet £334.32+VAT=/=£400
Const 1000W Peak 2400W
https://calstock.org.uk/media/blogs/elf/docs/vp12~1200.pdf vp12~1200 :: Manual and Data
https://calstock.org.uk/media/blogs/elf/docs/vp12~1200_dim.pdf ::vp12~1200 : Dimensions
**17th** Using this alone
**10:30** 15.54v 9A Connected Batt 2 Yield went to 14A voltage to 15.35
**10:50** 15.58v 11.1A 190W
**12:45** FLOAT so SET Float to 15.64 > 15.77 9.6A
END 7 hours at 1A = 84W 12.13V
End voltage is 12.2v at 0.4A History usage 190W See image at
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When yield went over 1Kw there was no bar representing float.
When I disconnected load and reconnected no Load current was noticed so appearing to add another amp to battery.
Later again similar switching load on and off takes a while to show any current draw.
Absorption set to 15.46 Live readout 15.72 :: some 0.26 higher
Cut off voltage set to 12.13 cut off at 12.35 :: some 0.22 higher
Victron connect automatically updated to V4.3
The noticeable was the removal on the graph of absorption and float bar if they had not been implemented.
[b]In response to a request for help I had these views:[/b]
I mentioned a number of options to alleviate your dependence on the generator. Given a spend of £600 you could buy 250W panel, 120Ah battery and a MTTP controller and peripherals. The ones I mentioned would be very good quality. You could save 100 or 2 maybe but quality would drop.
The cheapest option is just to have more batteries so that when you do run the generator you will be storing more for the next day. However after you gave me the details of the battery charger, at 10A max. it wouldn't charge much more with another battery or two and you would still have to run it for some hours. You may be able to get similar batteries to that you have for £60 (70Ah)
My latest view is that you would be better off with a single solar panel of 100W. This would give a 8A charge to your battery every hour of good sunlight, compared to 10Amax from the generator.
I have contacted Wind and Sun in Hereford and they have a new 100W panel from India, the cost is £126 including VAT and Carriage. It has a general junction box so standard cable can be used to connect it.
A more substantial option is to buy two such panels, two more batteries and a controller and you would be unlikely to have to use the generator, but that would cost another £350. This would give you 200W input, per good sunshine hour, 210Ah battery.
The outcome as of 20th June 2015 is to buy a single 100W panel as in the penultimate paragraph above. I am encouraging the user to connect it themselves and monitor the battery charge with a pre existing voltmeter. The panel can be manually adjusted to receive maximum radiance or alternatively reduced to ensure the battery doesn't over charge. (*Once a voltage of 14.5 has been sustained for two hours the maximum should be reduced to 14.* - This only applies to a continuous charge for example from a mains charger 24/7)
Today I noticed a 0.1v drop between the Victron and the batteries through 1 metre of 10mm^2 cable. At and 10A that's a resistance of 1/100 ohm