A modular power option for yacht builders
TBS Electronics introduced updated S versions of its Powersine Combi inverter-chargers on 8 October 2026. The Dutch manufacturer says the 2,000-to-3,500-watt models now support parallel stacking, allowing compatible installations to combine the power available from multiple units.
The development is relevant to 12–23.99-metre yachts where electrical loads may grow as an owner adds equipment. Parallel operation requires careful design, and the claimed capability should not be interpreted as permission to connect any two inverter-chargers without following manufacturer instructions.
How inverter-chargers serve a yacht
An inverter supplies alternating-current power from onboard batteries when shore power or a generator is unavailable. A combined charger can replenish batteries when suitable external AC input is available, while a transfer system manages the source serving connected equipment.
These functions are important for comfortable cruising because refrigeration, communications and domestic appliances may need stable power even when the generator is not running. Correct sizing requires assessment of peak loads, duty cycles and the actual battery bank.
Parallel stacking changes system planning
TBS describes the new S versions as capable of increasing inverter output, charging capacity and the supported AC transfer load through an appropriately configured parallel arrangement. The manufacturer's manuals specify a limited number of compatible units and the necessary cabling and setup.
A larger combined power rating does not increase the energy stored in the batteries. Owners should distinguish the ability to supply a short high load from the duration for which the vessel can support that load without replenishment.
Battery configuration becomes easier
The updated products allow battery-type selection more directly and permit maximum charging current to be set using DIP switches, rather than relying exclusively on a remote control or desktop software. Expanded charging programmes are intended to accommodate a broader variety of battery types.
Technicians must still select a profile matching the actual battery chemistry and manufacturer specifications. A convenient switch does not remove the need to verify voltage, temperature compensation, charge current and protective circuitry.
Integration with existing electrical systems
Inverter-chargers interact with shore connections, generators, breakers and the vessel's distribution panels. A yacht may also have battery monitors, solar inputs or other charging devices that need coordinated settings.
Refits should begin with an accurate wiring diagram and a load study rather than the assumption that increasing inverter capacity will solve every power problem. The installer needs to test transfer behaviour, protective devices and fault response under realistic conditions.
About TBS Electronics
TBS Electronics designs power conversion, charging and DC distribution products in the Netherlands. Its range includes standalone inverters, battery monitors and modular protection devices, so the S-version announcement fits within an established marine electrical portfolio.
The October update is a real product development, but its suitability is installation-specific. Buyers should obtain the current manual and confirmation of compatibility before ordering additional units for a yacht.
Power budgeting before expansion
A yacht that adds inverter capacity may also need improvements to battery charging, shore connection ratings and cable size. Power electronics should be integrated with the vessel’s protective devices as a single engineered system.
An owner may discover that the limiting factor is stored energy rather than peak conversion capacity. A realistic energy audit includes periods at anchor, air-conditioning demand and the consequences of operating without a generator.
