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Assumptions


18650 Battery Assumptions

SpecificationValue
Nominal Voltage3.7v
Max Voltage4.2v
Cutoff Voltage3.0v
Capacity2500mAh


Battery Spec 3S24P - 60Ah

SpecificationValue
Nominal Voltage (3 x 3.7v)11.1v
Max Voltage (3 x 4.2v)12.6
Min Voltage (3 x 3.0v)9v
Cells in Series for Voltage3

Parallel Cells to Get Capacity

60Ah/2.0Ah

30
Total Cells Required90

Dimensions (W x L x H)

1 cell: 18mm x 65mm

pack size: 18*3 x 18*24 x 65


54mm x  432 mm x 65mm

If battery stops being useful at 10.8 for some appliances (AC Inverter), then we would end up getting 50% the capacity of the 3S battery pack. 

My solar battery charger supports the 3S configuration.


Battery Spec 4S20P - 40Ah 

SpecificationValue
Nominal Voltage (4 x 3.7v)14.8v
Max Voltage (4 x 4.2v)16.8v
Min Voltage (4 x 3.0v)12.0v
Cells in Series for Voltage4

Parallel Cells to Get Capacity

40Ah/2.0Ah

20
Total Cells Required80

Would need to step down the voltage to 12v which may introduce some losses but would allow us to use the full capacity of the batteries.

Test Results of Batteries

numbercolormanuf.modelmAh
10982blueSamsungICR18650-28A2285
10983blueSamsungICR18650-28A2256
10984blueSamsungICR18650-28A2274
10985blueSamsungICR18650-28A2198
10986blueSamsungICR18650-28A2264
10987beigeLGLGABB418652431
10988beigeLGLGABB418652482
10989beigeLGLGABB418652453
10990beigeLGLGABB418652455
10991beigeLGLGABB418652484
10992beigeLGLGABB418652458
10999greenSamsungICR18650-30B2116
11006beigeLGLGDBB418652287
11020red (LPR)SanyoUR18650ZY2469
11025beigeLGLGABB418652285
11026beigeLGLGABB418652253
11027beigeLGLGABB418652454
11028beigeLGLGABB418652325
11029beigeLGLGABB418652212
11030beigeLGLGABB418652343
11031blueSamsungICR18650-28A2458
11032blueSamsungICR18650-28A2430
11033blueSamsungICR18650-28A2433
11034blueSamsungICR18650-28A2458
11035blueSamsungICR18650-28A2458
11036blueSamsungICR18650-28A2438
11037red (LPR)SanyoUR18650ZY2461
11041red (LPR)SanyoUR18650ZY2461
11043magentaSanyoUR18650ZTA2220
11044magentaSanyoUR18650ZTA2232
11045magentaSanyoUR18650ZTA2316
11046magentaSanyoUR18650ZTA2326
11047magentaSanyoUR18650ZTA2191
11048magentaSanyoUR18650ZTA2207
11049magentaSanyoUR18650ZTA2435
11050magentaSanyoUR18650ZTA2442
11051magentaSanyoUR18650ZTA2344
11052magentaSanyoUR18650ZTA2348
11053magentaSanyoUR18650ZTA2438
11054magentaSanyoUR18650ZTA2452
11055magentaSanyoUR18650ZTA2353
11056magentaSanyoUR18650ZTA2334
11057aquaLGLGDB1186502234
11058aquaLGLGDB1186502237
11059aquaLGLGDB1186502237
11060aquaLGLGDB1186502232
11061magentaSanyoUR18650ZTA2358
11062magentaSanyoUR18650ZTA2344
11063magentaSanyoUR18650ZTA2351
11064magentaSanyoUR18650ZTA2347
11065magentaSanyoUR18650ZTA2327
11066magentaSanyoUR18650ZTA2328
11067aquaLGLGDB1186502223
11068aquaLGLGDB1186502225
11069beigeLGLGABB418652444
11075greenSamsungICR18650-30B2403
11076greenSamsungICR18650-30B2458
11077greenSamsungICR18650-30B2446
11078greenSamsungICR18650-30B2462
11079greenSamsungICR18650-30B2422
11080greenSamsungICR18650-30B2374
11081greenSamsungICR18650-30B2117
11082greenSamsungICR18650-30B2115
11083greenSamsungICR18650-30B2099
11092magentaSanyoUR18650ZTA2459
11093magentaSanyoUR18650ZTA2456
11094magentaSanyoUR18650ZTA2435
11095magentaSanyoUR18650ZTA2458
11096magentaSanyoUR18650ZTA2467
11097magentaSanyoUR18650ZTA2439
11103beigeLGLGABB418652379
11104orangeLGLGABC218652138
11106orangeLGLGABC218652164
11115magentaSanyoUR18650ZTA2476
11116magentaSanyoUR18650ZTA2483
11118magentaSanyoUR18650ZTA2480
11131red (GR)SanyoUR18650F2408
11132red (GR)SanyoUR18650F2410
11133red (GR)SanyoUR18650F2398
11134blueSamsungICR18650-28A2340
11135blueSamsungICR18650-28A2343
11136blueSamsungICR18650-28A2404
11137blueSamsungICR18650-28A2427
11138blueSamsungICR18650-28A2435
11139blueSamsungICR18650-28A2391
11156greenSamsungICR18650-30B2433
11157greenSamsungICR18650-30B2439
11158greenSamsungICR18650-30B2474



total208



average2358



maximum2484



minimum2099

Spreadsheet: 88af-18650.xls

Battery Charger


Solar Charger

ALLPOWERS 20A Solar Charge Controller Solar Panel Battery Intelligent Regulator with USB Port Display 12V/24V


What battery type is this controller supported?

A: (1)B-01=LEAD-ACID, 12V; B-02=LITHIUM ION 3s, 3*3.7V=11.1V; B03=LIFePO4 4s, 4*3.2V=12.8V. (B01 is the default type, If you would like to to switch to another 2 types, please select it manually.)


Power Wall

Tesla's Power Wall

CapacityAh @12VCost
7 Kwh

=7000/12

=583 Ah

$3,000 US
10 Kwh

=10000/12

=833 Ah

$3,500 US

References

ReferenceURL


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