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Vehicle and tank monitoring

Votronic

Tank displays, sensors and battery monitors for caravans and motorhomes

Compare Votronic tank displays, sensors, battery monitors and related equipment for mobile installations.

Quick battery-monitor check

Estimate a practical shunt current range

Enter the battery voltage, inverter load, other simultaneous DC loads and maximum combined charging current. The estimate applies a 25% selection allowance.

bank
Nominal voltage of the monitored battery bank.
W
AC load supplied simultaneously by the inverter.
A
Battery-side DC loads running at the same time.
A
Add charging sources that can operate together.
Suggested minimum common shunt range
300 A shunt Typical system

Estimated discharge current is about 205.2A versus 100A charging. A 25% selection allowance gives 256.5A before choosing a suitable product range.

Estimate only: inverter watts ÷ nominal bank volts ÷ 90% assumed inverter efficiency, plus simultaneous DC loads, compared with maximum combined charging current; the larger path receives a 25% allowance. Verify the exact shunt’s continuous and overload ratings, cable and terminal limits, environmental rating and manufacturer instructions. A shunt is measuring equipment, not overcurrent protection.

Votronic monitoring products

Customer stories

Five-star support, from planning to after-sales

A rotating five-star selection from around 150 Google reviews for Solar 4 RVs equipment, advice and ongoing support.

5.0 out of 5 · Selected five-star Google reviews Read all Google reviews (opens in a new tab)
Google review

Absolutely stellar service from Cameron at Solar 4 RVs. Initially had him quote up a solar system for my campervan back in June 2024 and then when I was ready to purchase in November 2024 he was able to give me the best prices for every product and so I went ahead with the order.

Also gave me some tips to commission the system once I installed the products. Stoked on the Victron gear. Thanks guys!

Josh MillerCampervan power system
Google review

Purchased a 12v/15a battery charger in 2023. Had issues with it today (2025). Called their info number and explained. Instantly agreed to accept it as a warranty issue and dispatched a replacement without any problems. Extremely quick service and item dispatched express courier that same day. Outstanding customer service. Thank you.

Paul DavisBattery charger warranty support
Google review

Purchased a literal boat load of electronics from them for our vessel. It all works great and they did an amazing job setting up the panel. We have had the gear a few years now and still reach out when we need help. Great customer service!

Toni MansillaMarine power system and panel

Not sure which Votronic product suits your system? Send our technical team the model you are considering and your system details, and we will check the surrounding parts.

Ask our technical team

From the Solar 4 RVs library

Votronic monitoring and system guides

Guides on sensors, shunts, wiring and the power system behind your display.

Power and Energy

Solar 4 RVs guide

Power and Energy

Both power and energy are important components to consider when choosing solar power for your Caravan or boat as it must be able to...

Read guide

About this range


Made in Germany


















MotorHome Campers & Caravans

Comfort and Convenience while Traveling
Offroad  Offroad- & Expedition Vehicles

Robust and stable, for using far away from streets
Boats

Boats

Protected against Huminity


Emergency Vehicles Fire Fighting & Intervention Vehicles

Reliable and always ready for use (DIN-compliant)



For nearly 30 years Votronic has been engaged in the development and manufacturing of electronic devices for mobile applications particularly Campers, caravans, Marine, off-road and emergency vehicles.  The German made products include Solar charge controller, battery management and protection, tank level measurement and much more. 



Professional Solar Charging Technology



A correctly dimensioned solar system makes the camper, caravan or boat independent and consists of three components: Solar module, solar charging controller and battery. The VOTRONIC solar controllers are the link between solar module and battery, they work automatically, and they ensure optimum battery charging without overloading. If current is consumed during the day, immediate recharge is ensured, and a back discharge of the battery at night is avoided.

 

Votronic Solar Charging Technology

The units distinguish by high operating safety. High-quality charging technology in connection with intelligent microprocessor control ensures exact observation of charging voltage rates, charging current rates and charging time. The main charging port with characteristic line IU1oU2 can be set ideally to acid/lead-acid batteries, gel, AGM/fleece or lithium batteries. The battery temperature sensor (recommendable accessories, order no. 2001) for temperature compensation effects automatic increase of the charging voltage in case of low temperatures (winter operation) in order to improve and accelerate full charging of the weak battery. In case of summery temperatures, the charging voltage is reduced to minimize the load (gassing) of the battery and to extend the lifetime of gas-tight batteries (such as gel batteries). Voltage and current of the second charging port are reduced. It serves for support charging and trickle charge of the vehicle's starter battery in case of extended stop periods.

The charging controllers are suitable for any conventional solar module. More powerful systems can be created by application of several solar modules, also subsequently. The solar charging controller can then be chosen according to the capacity (Wp) of the solar module.

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