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
Unit 349-354, Faraday Mill Trade Park | 8:00am-6:00pm
https://www.plymouthbattery.co.uk/ 01752 227637
**Some notes on this business.**
I have spoken to two people mostly, Richard and Marc. My first contact with Richard seemed ok and they agreed to test the capacity of a couple of batteries. When I took two in I met with Mark who explained they would test the batteries by discharging and then charging and discharging to see what the capacity is after a full charge. This was late on a Friday. On Sunday I had a missed call to say the batteries were badly sulfated and what did I want to do about it. When I called back I spoke to Richard who didn't have exact details. I was bit put out by this and even more so once I understood he is the son of the guy I used to deal with when it was a small unit some 30 years ago.
For the workshop. 3 x REC 250w input in series to 250Ah 12v Rolls S6 145
Low temperature cut-off
This setting is available when a VE.Smart network is set-up and the battery temperature is available (e.g. by for example using a Smart Battery Sense or a Smart BMV with the optional temperature sensor). It can be used to disable charging at low temperatures as required by Lithium batteries.
For Lithium Iron Phosphate batteries this setting is preset at 5 degrees Celsius, for the other battery types it is disabled. When creating a user defined battery the cut-off temperature level can be adjusted manually.
See the VE.Smart Network manual for details on what devices are capable of transmitting temperature.
Manual Equalization - Start now
Selecting 'Start now' on 'Manual equalisation' allows manual initiation of an Equalization cycle. To allow the charger to equalize the battery properly use the manual equalize option only during absorption and float periods, and when there is sufficient sunlight. Current and voltage limits are identical to the automatic equalize function. The duration of the equalisation cycle is limited to a maximum of 1 hour when triggered manually. Manual equalization can be stopped at any time by selecting 'Stop Equalize'.
Just before installation around sunset May 12th the values are
1: 1.260 | 2: 1.265 | 3: 1.250 | 4: 1.250 | 5: 1.245 | 6: 1.250
I have bought Rolls again, 1 off Rolls S12 27 (105Ah @ 20Hr) this time direct from Barden UK.
A major factor in choice is weight. I only want to lift around 30Kg. The previous HT 31 was 27.5Kg. The new S12 27 weighs 24.5 Kg, one size down from the HT/S12 31.
Details for S12 27
Rolls S12 27 – 12V Series 4000 Battery < £154: 3 Years Warranty
Weight: 24.5 kg ~ 54lbs | Length 32.1 cm 12.63" | Width 17.1 cm 6.75" | Height Inc. Term. 23.8 cm 9.38"
Volts: 6 | BCI: Grp 27 | Cells: 6| Plates/Cell: ?
Terminal Type DT
Included Hardware S/S Hex Cap Screw, Nut, Lock & Flat Washer
Size & Thread 5/16″-18 x 1-1/2″
Cold Crank Amps (CCA) 0°F / -17°C 660 Marine Crank Amps (MCA) 32°F / 0°C 825 Reserve Capacity (RC @ 25A) 185 Minutes Reserve Capacity (RC @ 75A) 53 Minutes
Charge Voltage Range
Bulk : Absorption = 2.45-2.5 V/cell @ 25°C (77°F) or 14.7v to 15v
Float Voltage = 2.25 V/cell @ 25°C (77°F) or 13.5v
Equalisation = 15.48 to 16.02 SG 1.280
Recommended Charge Current Capacity (String) 15A
Maximum Charge Current (String) 25 A
Self-Discharge Rate 5%-10% per month at 25°C (77°F)
Hour Rate Capacity : AMP Hour : Current / AMPs
@ 100 Hour Rate 140 AH 1.4 A |@ 20 Hour Rate 105 AH 5.25 A | @ 15 Hour Rate 99 AH 6.58 A
@ 10 Hour Rate 89 AH 8.93 A | @ 8 Hour Rate 87 AH 10.89 A | @ 5 Hour Rate 85AH 17.01 A | @ 1 Hour Rate 38 AH 37.8 A
Amphere hour capacity ratings based on specific gravity of 1.280.
Reduce capacities 5% for specific gravity of 1.265 and 10% for 1.250.
7th April. Just attached the cables to the roof of the workshop by first fixing an upright to one of the purlins and then a batten from that to one of the rails. The attachement to the rails is just ~ wedged under. The wood is Siberian Larch left over from the rafters and battens respectively.
The batten had a copper strip running on it's upper edge and the cables are held to the upper face by fabricated copper clamps. The clamps are made from flattened 10mm copper pipe comming out as some 50mm long and 15mm wide and 2mm thich. They are bent to shape and fastened wiyth two stainless screws. The copper strip is fastened with bronze ringed nails.
9th April. Fitted copper earthing strip to wall of workshop. Still have to connect a) the frames of the pannels together b) the panels frames to the earth conductor c) joint parts of the copper earth conductor and d) insert copper rod to earth and connect that to the joined up a,b and c.
The cables are fastened with homemade clamps
The copper strip has been hammered into the chamfers which hopefully will allow for any expansion of timbers.
10th April. Used s-old-id fuse box for 110v input from solar array. .
See https://unveiled.info/solect/installation for next stage