Quote:
Originally Posted by MetroMPG
Today, with two 6v "junk" batteries (from the forklift company) in series to make 12v, then in parallel with the existing 12v starting battery, I did a 46 mile / 74 km alternator-less round trip.
Starting voltage: 12.68
Ending voltage: 12.40 (batteries resting for 1 hour)
11.7v is "empty", so I used 26% pack capacity in that trip, with light accessory load: wipers occasionally; heater fan occasionally; lights; occasionally; plus engine overhead, turn signals & brake lights.
Assuming similar electrical loads, my total range to 100% depth of discharge is about 177 miles / 285 km.
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It is currious - the Two 6V Forklift batteries would each weigh (in my guess about 66lbs each) 132 lbs!
So - if you tried this with 4 x
60 Ah Thundersky Batteries at about $64.50/$75 apiece, for a $300 total - but - a total weight of about ~10 Kg, or 22 lbs, I wonder how that 110 lbs weight saving would change the energy used, and since they handle deeper discharges even better (1C x 100% DOD = 1000 Cycles - vs Lead Acid .05C x 80% DOD = about 450 cycles) the cost in the long run could actually be cheaper than free! (Free Beastly batteries)
If you did not seem to need the 60Ah sizes, myabe just use 4 x 40 Ah cells for $200?
Alliance Renewable Energy = $43/$50 China/USA.
Consider - if the forklift company gave you 'expired' Lithium Iron Phoshpate cells - that has just 80% of original rated power - you cold get the best of both worlds - free and LiFePO4!
Someday!
Robert