STERLING PRO BATT ULTRA Battery-to-Battery Charger / integr. MPPT solar regulator/ 12 V to 12 V / 30 A

Only 1 left in stock
SVB price: €336.09
Excl. VAT, excl. shipping costs.
This is a NET-price excluding German VAT. Shipments to countries outside of the EU may be subject to import duties and taxes.
€336.09 This is a NET-price excluding German VAT. Shipments to countries outside of the EU may be subject to import duties and taxes.
Article Number
Model no.
STERLING - Battery-to-Battery Charger / with integr. MPPT solar regulator
Charging Current
30 A
11 - 20 V
12 V

Product details

This STERLING battery-to-battery charger enables faster, optimised and temperature-compensated charging of a further battery (e.g. for a bow thruster, windlass or 2nd consumer battery). Primary and secondary batteries can be of different types, as the 4-stage IU characteristic of the unit can be optimally adjusted to the connected battery type (AGM, lead acid, GEL, LiFePO4, etc.). The B2B ensures that the primary battery (e.g. the starter battery) is not discharged unintentionally. It can also compensate for the voltage losses that are caused by long cable routing. When charging LiFePO4 batteries, it limits the charging current and protects the alternator from overload. The integrated MPPT solar regulator charges the battery when the engine/ignition is switched off. (The B2B and the integrated MPPT charge regulator do not work simultaneously.) The MPPT charge regulator processes up to 350 W of solar power. The open-circuit voltage (VOC) of the solar module must not exceed 31 V. A further advantage is the quick and easy installation, as no complex wiring is required.

Further features at a glance
  • Compact, lightweight design
  • 4-stage battery charging: Charges much faster than a standard alternator
  • 9 common battery types can be set (including AGM, gel, lithium-ion and lead acid)
  • Customisable profile: choose your own charging profile on the front panel
  • Temperature-compensated charge, temperature sensor included in delivery contents
  • Compensation of voltage losses on long wire routing (this requires an additional 1.5 mm² measuring wire from the battery to the B2B)
  • Ideal for charging a second battery in low-emission Euro 6 engines.
  • Night setting: Allows the unit to operate at half power to keep fan noise low
  • Multistage fan cooling
  • 100% fireproof
  • Remote control is available as an accessory
  • E-Mark certified

Technical Data
Input voltage: 11 - 20V DC
Solar input voltage (VOC): <31V DC
Input current: 30 A
Recommended input/output fuse: 40 A
Cable cross-sections: 10mm² (POS & NEG each max. 1.5 metres long)
Waterproof to: IP 21
Dimensions: 160 x 190 x 70 mm (WxHxD)
Weight: 1.4 kg


en-flag Datasheet
PDF, 3,95 MB
en-flag Manual
PDF, 5,69 MB

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