{"product_id":"ebc-b20h","title":"Battery Pack Capacity Tester, 12-72V 20A - Zketech EBC-B20H","description":"\u003c!-- ========== IMAGE 1: HERO - unit 3\/4 angle, screen lit, clipped to a 48V pack ========== --\u003e\n\u003cp\u003eThe \u003cstrong\u003eZKETECH EBC-B20H\u003c\/strong\u003e is a pack-level capacity tester. It runs a real constant-current discharge on an assembled \u003cstrong\u003e12 V to 72 V\u003c\/strong\u003e battery at up to \u003cstrong\u003e20 A\u003c\/strong\u003e, measures what actually comes out in amp-hours and watt-hours, and plots the whole curve on your PC. Paired with your own charger it also meters the charge going back in, so you can log a complete cycle.\u003c\/p\u003e\n\u003cp\u003eThis is the instrument you reach for when the pack is already built. Cell testers stop at 5 V and bench loads stop at 30 V. The B20H is for the 24 V, 36 V, 48 V and 72 V packs that most people are actually buying, building and selling: server rack batteries, e-bike and scooter packs, golf cart banks, RV and off-grid batteries.\u003c\/p\u003e\n\u003cdiv style=\"border-left: 4px solid #c0392b; background: #fdf3f2; padding: 12px 16px; margin: 1em 0;\"\u003e\n\u003cp style=\"margin: 0;\"\u003e\u003cstrong\u003eRead this first: there is no charger inside.\u003c\/strong\u003e The B20H is a discharge tester with a charge-monitoring mode. In CHG mode you connect \u003cem\u003eyour own\u003c\/em\u003e charger to the posts on the rear panel, and the B20H meters the charge and stops the run when current tapers below the value you set. If you want a full charge-discharge cycle, you need a charger for your pack voltage. If you only want a capacity number, you do not.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch2\u003eKey features\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e12–72 V pack coverage\u003c\/strong\u003e, with a settable cutoff anywhere from 8.00 V to 88.00 V, so it handles lead-acid, LiFePO₄, Li-ion and LTO packs at any series count in that window.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProgrammable constant-current discharge\u003c\/strong\u003e, 0.10–20.00 A in 0.01 A steps. Set the current, set the cutoff voltage, walk away.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReal capacity measurement\u003c\/strong\u003e in amp-hours and watt-hours, resolved to 0.001 Ah on small packs and 0.1 Ah past 100 Ah.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCharge metering with an external charger\u003c\/strong\u003e, stopping automatically when charge current falls below your set value.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFour-wire measurement.\u003c\/strong\u003e Voltage and current on separate channels, so lead resistance and connector drop do not corrupt the reading. On a 48 V pack at 20 A this is the difference between a measurement and a guess.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePC software with real graphing.\u003c\/strong\u003e The free EB Tester software plots voltage and current against time and stores the run, so you can show a customer the curve rather than a claim.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eStandalone operation.\u003c\/strong\u003e Front-panel buttons and LCD, no computer required. The software adds graphing and logging.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUniversal AC input\u003c\/strong\u003e, 100–240 V, so it runs on US mains as shipped.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- ========== IMAGE 2: LCD CLOSE-UP with callout labels on each field ========== --\u003e\n\u003ch2\u003eWhat you can test\u003c\/h2\u003e\n\u003ctable border=\"1\" cellspacing=\"0\" cellpadding=\"6\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003ePack\u003c\/th\u003e\n\u003cth\u003eFull-charge voltage\u003c\/th\u003e\n\u003cth\u003eDischarge test?\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e12 V lead-acid, AGM, golf cart\u003c\/td\u003e\n\u003ctd\u003e12.7–14.8 V\u003c\/td\u003e\n\u003ctd\u003eYes, at up to 10 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e12 V LiFePO₄ (4s)\u003c\/td\u003e\n\u003ctd\u003e14.6 V\u003c\/td\u003e\n\u003ctd\u003eYes, at up to 10 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e24 V pack (8s LiFePO₄, 2x12 V lead-acid)\u003c\/td\u003e\n\u003ctd\u003e29.2 V\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e36 V pack (10s Li-ion, e-bike)\u003c\/td\u003e\n\u003ctd\u003e42.0 V\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e48 V pack (16s LiFePO₄, server rack, golf cart)\u003c\/td\u003e\n\u003ctd\u003e54.4–58.4 V\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e52 V \/ 60 V pack (14s–16s Li-ion)\u003c\/td\u003e\n\u003ctd\u003e58.8–67.2 V\u003c\/td\u003e\n\u003ctd\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e72 V pack (20s Li-ion, 24s LiFePO₄)\u003c\/td\u003e\n\u003ctd\u003e84.0–87.6 V\u003c\/td\u003e\n\u003ctd\u003eYes, up to the 88 V ceiling\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSingle cell, or anything under 8 V\u003c\/td\u003e\n\u003ctd\u003eunder 8 V\u003c\/td\u003e\n\u003ctd\u003eNo. Use a single-cell tester such as the EBC-A40L\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e96 V and above\u003c\/td\u003e\n\u003ctd\u003eover 88 V\u003c\/td\u003e\n\u003ctd\u003eNo, this is the hard ceiling\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp style=\"margin-top: 1em;\"\u003e\u003cstrong\u003eTesting loose cells instead of a pack?\u003c\/strong\u003e The B20H starts at 8 V. For single cells look at the EBC-A40L (5 V, 40 A); for packs up to 30 V where you also want charging built in, the EBC-A20.\u003c\/p\u003e\n\u003ch2\u003eHow much current can you actually pull?\u003c\/h2\u003e\n\u003cp\u003eTwo limits apply. The \u003cstrong\u003e12 V rule\u003c\/strong\u003e is in the manual: on a 12 V pack the maximum discharge current is \u003cstrong\u003e10 A\u003c\/strong\u003e, not 20 A. Above that the full 20 A range is available, subject to the unit’s power dissipation limit.\u003c\/p\u003e\n\u003c!-- TODO: max discharge power in watts is NOT in the manual. Get it from the supplier, then either fill in this table or delete the section. Do not publish a current-vs-voltage table built on a guess. --\u003e\n\u003cp\u003eIn practice most capacity tests are run well below the maximum anyway. A 0.2 C test on a 100 Ah pack is 20 A, and on a 280 Ah bank a 20 A test is a gentle 0.07 C. The amp-hour figure is just as accurate at a lower current; the test simply takes longer.\u003c\/p\u003e\n\u003c!-- ========== IMAGE 3: GRAPHIC - discharge current vs pack voltage envelope ========== --\u003e\n\u003ch2\u003eWorked example: capacity-testing a 48 V 100 Ah server rack battery\u003c\/h2\u003e\n\u003cp\u003eThe common case: a rack battery, new or used, that claims 100 Ah and 5 kWh. Here is how you find out.\u003c\/p\u003e\n\u003ctable border=\"1\" cellspacing=\"0\" cellpadding=\"6\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eStep\u003c\/th\u003e\n\u003cth\u003eMode\u003c\/th\u003e\n\u003cth\u003eSettings\u003c\/th\u003e\n\u003cth\u003eWhat happens\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003eCharge first, with your own charger\u003c\/td\u003e\n\u003ctd\u003eCharger set to 56.0 V · tester in CHG mode · cutoff current 5 A\u003c\/td\u003e\n\u003ctd\u003eThe pack is brought to a true full charge and the tester stops the run as current tapers. A capacity test only means something if it starts from full.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003ctd\u003eDSC (discharge, constant current)\u003c\/td\u003e\n\u003ctd\u003eCurrent 20 A · Cutoff 44.8 V\u003c\/td\u003e\n\u003ctd\u003eDraws a steady 20 A until the pack reaches 2.8 V per cell. \u003cstrong\u003eThis step produces your capacity figure in Ah and Wh.\u003c\/strong\u003e About 5 h on a healthy 100 Ah pack.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e3\u003c\/td\u003e\n\u003ctd\u003eRecharge\u003c\/td\u003e\n\u003ctd\u003eCharger set to your normal float or storage voltage\u003c\/td\u003e\n\u003ctd\u003eLeaves the pack in a sensible state rather than sitting empty.\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp style=\"margin-top: 1em;\"\u003e\u003cstrong\u003eSet your cutoff above the BMS low-voltage disconnect,\u003c\/strong\u003e not below it. If the BMS trips first, the test ends early and the capacity number is wrong. On a 16s LiFePO₄ pack, 44.8 V (2.8 V per cell) is a sane target that leaves the BMS out of it. For a 12 V lead-acid battery use 10.5 V and expect the rated capacity only at the 20-hour rate.\u003c\/p\u003e\n\u003c!-- ========== IMAGE 4: SOFTWARE SCREENSHOT - discharge run in progress ========== --\u003e\n\u003ch2\u003eReading your results\u003c\/h2\u003e\n\u003cp\u003eThe software plots voltage and current against time. In a constant-current discharge the current trace holds flat while the voltage trace slides down to your cutoff, and the run reports measured capacity in amp-hours alongside watt-hours.\u003c\/p\u003e\n\u003cp\u003eWatt-hours are the honest number on a pack. A 48 V 100 Ah battery advertised at 5.12 kWh that delivers 4.1 kWh has told you something specific, and the curve tells you why. \u003cstrong\u003eA pack that sags steeply from the start\u003c\/strong\u003e has high internal resistance, tired cells, or a connection problem. \u003cstrong\u003eA pack that tracks normally and then falls off a cliff early\u003c\/strong\u003e usually has one weak cell dragging the string down, which is a balancing or cell-replacement job rather than a dead pack. LiFePO₄ holds a long flat plateau and then drops sharply at the end; lead-acid slopes steadily the whole way.\u003c\/p\u003e\n\u003cp\u003eSave the run. A dated discharge curve is the difference between \"the battery seems weak\" and a warranty claim a supplier will act on.\u003c\/p\u003e\n\u003c!-- ========== IMAGE 5: SOFTWARE SCREENSHOT - completed discharge curve, annotated ========== --\u003e\n\u003ch2\u003eTechnical specifications\u003c\/h2\u003e\n\u003ctable border=\"1\" cellspacing=\"0\" cellpadding=\"6\"\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth\u003eParameter\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModel designation\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eEBC-B20H: 12–72 V pack tester, 20 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePower supply\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAC 100–240 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBattery packs supported\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e12 V, 24 V, 36 V, 48 V, 60 V, 72 V nominal\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDischarge voltage range\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.10–89.00 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCutoff voltage setting\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e8.00–88.00 V in 0.01 V steps\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDischarge current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.10–20.00 A in 0.01 A steps (10 A maximum on 12 V packs)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaximum discharge power\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003c!-- TODO from supplier, see note above --\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCharging\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eExternal charger required. CHG mode meters the charge and stops when current falls below the set value\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAccuracy\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e±0.5 % on voltage and current\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCapacity resolution\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eUnder 10 Ah: 0.001 Ah · 10–100 Ah: 0.01 Ah · Over 100 Ah: 0.1 Ah\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTest timer\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0–999 minutes per step; set 0 for no time limit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eConnections\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eTwo front-panel aviation sockets for the battery (positive left, negative right), red and black charger-input posts on the rear panel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMeasurement\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFour-wire, voltage and current channels separated\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDisplay\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eLCD showing mode, voltage, current, elapsed time, capacity and energy\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePC connection\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDedicated USB-TTL cable, for graphing, calibration and firmware updates\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDimensions and weight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003c!-- TODO from supplier PI --\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eShipping box\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003c!-- TODO from supplier PI --\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch2\u003eWhat’s in the box\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eZKETECH EBC-B20H battery pack tester\u003c\/li\u003e\n\u003cli\u003eAC power cord\u003c\/li\u003e\n\u003cli\u003eUSB-TTL communication cable for PC connection\u003c\/li\u003e\n\u003cli\u003eTest leads with clips\u003c\/li\u003e\n\u003cli\u003ePrinted user manual, plus software download links\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- TODO confirm the whole list, lead gauge and terminal type against the supplier PI --\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c!-- ========== IMAGE 6: FLAT LAY - everything in the box, arranged and labelled ========== --\u003e\n\u003ch2\u003eConnecting to your computer\u003c\/h2\u003e\n\u003cp\u003eThe tester works fully standalone using its front-panel buttons. The software is what turns a number into evidence: a saved, dated curve you can send to a supplier or show a buyer.\u003c\/p\u003e\n\u003col\u003e\n\u003cli\u003e\n\u003cstrong\u003eInstall the USB-TTL driver\u003c\/strong\u003e, then install the \u003cstrong\u003eEB Tester\u003c\/strong\u003e software. Download links for both are in the manual and at zketech.com.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWindows in S Mode?\u003c\/strong\u003e You will need to leave it first, or Windows will block the install. Open the Microsoft Store, search “switch out of S mode”, and click Get.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePower on the tester\u003c\/strong\u003e and connect the included USB adapter between the tester and your PC.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOpen EB Tester\u003c\/strong\u003e and find \u003cstrong\u003eComm Setting\u003c\/strong\u003e. Choose your COM port and click Connect. It is usually a number between COM3 and COM9. If no port appears, the driver has not installed correctly.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cdiv style=\"border-left: 4px solid #d68910; background: #fdf8ef; padding: 12px 16px; margin: 1em 0;\"\u003e\n\u003cp style=\"margin: 0;\"\u003e\u003cstrong\u003eWindows only.\u003c\/strong\u003e ZKETECH has confirmed the EB Tester software does not currently run on macOS. Mac users can still operate the tester manually from its front panel, but cannot graph or log runs.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003ch2\u003eTypical applications\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eVerifying the real capacity of a used e-bike, scooter, golf cart or EV pack before you buy it or after you rebuild it\u003c\/li\u003e\n\u003cli\u003eIncoming inspection on 48 V server rack batteries, against the number on the label\u003c\/li\u003e\n\u003cli\u003eAnnual capacity check on an off-grid or backup bank, to track degradation year over year\u003c\/li\u003e\n\u003cli\u003eProving out a pack you just assembled, before it goes into service\u003c\/li\u003e\n\u003cli\u003eGrading and pricing used packs for resale, with a curve attached\u003c\/li\u003e\n\u003cli\u003eDocumenting capacity loss for a warranty claim\u003c\/li\u003e\n\u003cli\u003eLoad-testing 12 V and 24 V lead-acid banks at a controlled current instead of a carbon pile\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c!-- ========== IMAGE 7: IN USE - clipped to a 48V rack battery, laptop showing the curve ========== --\u003e\n\u003ch2\u003eSafety and usage notes\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003e88 V is the ceiling.\u003c\/strong\u003e Do not connect a 96 V or higher pack.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eNever reverse polarity,\u003c\/strong\u003e and make your connections before starting the run.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLeave the BMS connected\u003c\/strong\u003e and set your cutoff voltage above its low-voltage disconnect, or the BMS will end the test for you and the reading will be short.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSize your leads for the current\u003c\/strong\u003e and make solid terminal connections. Poor contact at 20 A means heat and a skewed measurement.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eKeep the vents clear.\u003c\/strong\u003e Everything you pull out of the pack leaves this unit as heat, and the fan needs airflow around the case.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e12 V packs are limited to 10 A.\u003c\/strong\u003e This is a design limit, not a fault.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUse the supplied USB-TTL cable.\u003c\/strong\u003e An ordinary USB cable will not communicate; the supplied cable contains a serial converter.\u003c\/li\u003e\n\u003cli\u003eRun tests in a clear, non-flammable area with ventilation, and do not leave a suspect pack discharging unattended overnight.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eFrequently asked questions\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eDoes it charge the battery?\u003c\/strong\u003e\u003cbr\u003eNot on its own. There is no charger inside. In CHG mode you connect your own charger through the tester and the B20H meters the charge and stops it when current tapers below your set value. For discharge and capacity testing, nothing else is needed.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat charger do I need?\u003c\/strong\u003e\u003cbr\u003eAny bench or pack charger that matches your pack voltage and chemistry, with an adjustable or correct charge voltage. If you only want a capacity number, you can charge the pack however you normally do and use the B20H for the discharge alone.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan it test a 96 V or 100 V pack?\u003c\/strong\u003e\u003cbr\u003eNo. The measurement range tops out at 89 V and the cutoff setting at 88 V, which covers 72 V nominal packs at full charge and nothing higher.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy is my 12 V battery limited to 10 A?\u003c\/strong\u003e\u003cbr\u003eThat is the specified limit for 12 V packs. The full 20 A range applies to higher pack voltages.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan it test a single cell?\u003c\/strong\u003e\u003cbr\u003eNo. The lowest cutoff you can set is 8 V. For single cells look at the EBC-A40L (5 V, 40 A) or the EBC-A20.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eHow long does a test take?\u003c\/strong\u003e\u003cbr\u003eCapacity divided by current. A 100 Ah pack at 20 A is about 5 h; a 280 Ah bank at 20 A is about 14 h. Set the step timer to 0 so nothing cuts the run short.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes it work on a Mac?\u003c\/strong\u003e\u003cbr\u003eNot for the software. ZKETECH has confirmed EB Tester is Windows only. Manual front-panel operation works regardless.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDo I need a computer to use it?\u003c\/strong\u003e\u003cbr\u003eNo. Current, cutoff and timer are all settable from the front panel and the LCD shows the running capacity. The software adds graphing and saved runs.\u003c\/p\u003e\n\u003ch2\u003eDownloads and support\u003c\/h2\u003e\n\u003cp\u003e\u003cstrong\u003eUser manual:\u003c\/strong\u003e Download the official EBC-B20H user manual (PDF) TBD\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSoftware:\u003c\/strong\u003e The EB Tester software and USB-TTL driver are free downloads from zketech.com, with links provided in the manual.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eSystem requirements:\u003c\/strong\u003e Windows 7, 8, 10 or 11 with a free USB port and administrator rights to install the driver. Not compatible with macOS.\u003c\/p\u003e","brand":"OGSolarStore","offers":[{"title":"Default Title","offer_id":46547300090006,"sku":"EBC-B20H","price":567.0,"currency_code":"AUD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0459\/7609\/2822\/files\/Ha95f03158b2d4a248f5a28c4c1a37854o.jpg_960x960q80.jpg?v=1788208396","url":"https:\/\/ogsolarstore.com\/en-au\/products\/ebc-b20h","provider":"OGSolarStore","version":"1.0","type":"link"}