SMART BATTERY CHARGER

«NANO-20»

Ease of use:

Just connect it and charge: fully automatic operation.

Charges all types of 12-volt batteries.

Protection from common connection mistakes. Suitable for trucks, motorcycles, yachts, workshops, and home use. Helps with cold starts with a pre-start mode down to -25 C. The charger shows battery condition immediately after connection. Controls are convenient, and clear instructions are available.

Advantages of NANO-20:

Compact and convenient, with a neat metal body, reliable and impact resistant. Long copper leads. Accurate measurements and clear charge-progress indication. Suitable for everyday users as well as service stations, workshops, and auto shops. Includes storage mode and battery-capacity improvement functions.

Features of the NANO-20 smart charger:

Recovery of deeply discharged batteries. Uses popular charge algorithms. Includes discharge mode, battery-capacity measurement, and manual current and voltage adjustment. The controls are intuitive. Main operating modes are printed on the top of the case.

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Technical specifications

Parameter	Range	Adjustment step
Charge current	0 — 20.0 A	0.1 A
Charge voltage	12.0 — 18.5 V	0.1 V
Battery voltage range for charge-current adjustment	7.5 — 18.5 V	0.1 V
Battery voltage for charger operation	0 — 18.0 V	—
Automatic battery recovery	0 — 7.5 V	—
Discharge current	0.1 A — 2.0 A	0.1 A
Discharge voltage	10.5 — 13.5 V	0.1 V
Amp-hour counter, charge/discharge	0 — 1000 Ah	from 0.1 Ah
Charge-time counter	0 — 1000 hours	10 minutes
Mains voltage	160 — 253 V	—
Maximum mains power consumption	380 W	—
Weight	650 g	—
Size (L x W x H)	110x115x50 mm	—

Charge currentRange: 0 — 20.0 AStep: 0.1 A

Charge voltageRange: 12.0 — 18.5 VStep: 0.1 V

Battery voltage range for charge-current adjustmentRange: 7.5 — 18.5 VStep: 0.1 V

Battery voltage for charger operationRange: 0 — 18.0 VStep: —

Automatic battery recoveryRange: 0 — 7.5 VStep: —

Discharge currentRange: 0.1 A — 2.0 AStep: 0.1 A

Discharge voltageRange: 10.5 — 13.5 VStep: 0.1 V

Amp-hour counter, charge/dischargeRange: 0 — 1000 AhStep: from 0.1 Ah

Charge-time counterRange: 0 — 1000 hoursStep: 10 minutes

Mains voltageRange: 160 — 253 VStep: —

Maximum mains power consumptionRange: 380 WStep: —

WeightRange: 650 gStep: —

Size (L x W x H)Range: 110x115x50 mmStep: —

1. Technical description.

The smart charger is designed to charge 12V batteries with a capacity from 4 to 250 Ah.

Supported 12V battery types:

LiFePO4 – lithium iron phosphate technology
Pb/Sb – low-antimony lead technology
Ca+(Hybrid) – lead-calcium hybrid technology with antimony additive
Ca/Ca – calcium-calcium technology
EFB – enhanced flooded battery technology
Ag (Silver) – silver technology
AGM – absorbed electrolyte technology
GEL – gel electrolyte technology

Five operating modes plus four special modes allow the user to choose the best charging process for the current battery condition.

The LED display shows real voltage on the battery terminals, current, charge time, received amp-hours, and the selected operating mode.

Charge current from 0.1 to 20.0 A is adjusted with the control knob. In automatic current-detection mode, the charger selects the optimal current itself.

Each battery type requires a manufacturer-defined maximum allowable voltage threshold during charge. NANO-20 allows setting the voltage limit from 12 to 18.5 V.

The charger includes reverse-polarity protection. If the battery is connected with incorrect polarity, the device is blocked until the connection is corrected.

Output short-circuit protection is included. A high-efficiency fan prevents overheating, and its speed depends on the selected operating mode.

PDF documents

USER MANUAL — OPEN

ADVANCED USER MANUAL — OPEN

ENGINEER MANUAL — OPEN

2. Operating modes.

CAtAutomatic charge with optimal current (CAt). NANO-20 selects the current automatically.

AAtFully automatic mode (AAt). NANO-20 selects both voltage and current automatically.

CC1Automatic four-stage mode (CC1). Initial current is set with the control knob.

PR.1Program PR.1 provides more flexible control over the charging process logic.

S-CRecovery of flooded batteries with a capacity from 4 to 250 Ah (S-C).

AGRecovery of AGM batteries with a capacity from 4 to 250 Ah (AG).

MANManual charge (MAN).

ПЗMaintenance charge. The charger maintains 13.6 V on the battery.

DischargeDischarge mode. The battery is discharged to the selected voltage threshold with constant current and amp-hour counting.

End-of-charge voltage for different battery types

Technical name: end-of-charge voltage table.

Battery type	End-of-charge voltage
Pb/Sb – lead with antimony additive	14.4 — 14.8 V
Ca+(Hybrid) – lead-calcium	14.8 — 15.3 V
Ca/Ca – calcium-calcium	14.7 — 16.4 V
EFB, SFB – enhanced flooded battery	15.3 — 16.6 V
Ag (Silver) – silver additive	15.0 — 16.4 V
AGM technology	14.6 — 15.1 V
GEL technology	14.1 — 14.4 V

Pb/Sb – lead with antimony additiveEnd-of-charge voltage: 14.4 — 14.8 V

Ca+(Hybrid) – lead-calciumEnd-of-charge voltage: 14.8 — 15.3 V

Ca/Ca – calcium-calciumEnd-of-charge voltage: 14.7 — 16.4 V

EFB, SFB – enhanced flooded batteryEnd-of-charge voltage: 15.3 — 16.6 V

Ag (Silver) – silver additiveEnd-of-charge voltage: 15.0 — 16.4 V

AGM technologyEnd-of-charge voltage: 14.6 — 15.1 V

GEL technologyEnd-of-charge voltage: 14.1 — 14.4 V

Table 1

3. Usage recommendations.

Do not allow liquids, acids, or acid mixtures to enter the device. Make sure the fan cannot draw liquid particles inside the charger.
Do not block the ventilation openings.
Do not cover the charger body. Place it so that air can circulate freely around the case.
Do not expose the operating charger to direct sunlight. Additional heating can reduce operating efficiency.
The charger is calibrated with voltage drop on the battery leads taken into account. Changing the length of these leads is possible, but correct voltage measurement on the battery is no longer guaranteed.

4. Warranty.

The warranty period is 24 months from the purchase date of NANO-20, including software updates.

After the warranty period, post-warranty service and repair are available.

Current NANO-20 version: c2.6

Version c2.6 improves parameter adjustment, displays the firmware version during startup, and updates the charging program: PR.1 is available instead of CC.2.

View version history