230Ah that fits the underseat bay precisely. Add a unit when you need more.

The new Sigma
Underseat space in a motorhome is fixed. The Sigma is built around it: 230Ah in a battery that fits the bay precisely, with room left over for your inverter.
When you need more, you add a unit alongside it. Up to four in parallel, without changing the installation.
Most batteries ask you to work around them. The Sigma starts from the bay and builds outward, so the rest of your system still fits.

Designed around the underseat bay dimensions found in motorhomes. It fits where other batteries don't, and leaves space for the rest of your system.
Run one unit or four in parallel, up to 920Ah in the same footprint. The system grows with you, without any change to the installation.

Side-mounted terminals make connections easy to reach and easy to work with, even in a tight underseat bay.
Whether you sail, navigate, race, or fish for fun or professionally, having reliable power is essential. Super B lithium batteries provide long-lasting, dependable energy for all types of vessels. With lithium iron phosphate technology (LiFePO4), you can navigate independently, free from noise, vibrations, or exhaust fumes.
Leisure boats and yachts prioritize comfort and safety. Super B lithium batteries enhance your onboard experience by providing silent, reliable power. Enjoy beautiful harbors and spots with no noise, vibrations, or exhaust fumes, ensuring a stress-free aquatic journey.
Super B lithium batteries are engineered for durability and safety. They charge quickly, discharge slowly, and hold their charge longer than lead-acid batteries. With a higher energy density, they require less space and weight—perfect for leisure marine applications.
Spend less time charging and more time on the water. Super B lithium batteries can fully recharge within one hour, giving you the freedom to extend your journey without compromise.
Store your boat over long periods without worry. With a 10x lower self-discharge rate than lead-acid batteries, Super B lithium batteries are ready to power your next adventure whenever you are.
Sigma was designed around the space you actually have. That changes what's possible.
The inverter and the charger go where you want them. The terminals sit where you can actually reach them. And when you add solar, or a second fridge, or just want more days off-grid, you add a unit instead of rebuilding the installation.

The Simarine Pico Super B Edition is an ideal choice for both on-road and water adventures.

CAN, CANopen, RV-C, Victron, LIN (CI-BUS, VW-LIN) and Bluetooth, plus three configurable IO contacts for inverter and generator control.

Precision cell matching, thermal management across extremes, and mechanical robustness that shrugs off vibration, shock and heat.
Want to be the first to know updates on our new product? Stay connected with what Super B is building.