Upgrading a yacht to lithium power can feel daunting. Full conversions often mean new chargers, new cabling, new protection devices, and hours of re-engineering. But there's a far simpler, more practical entry point that works for many cruising setups:
Add a small lithium bank alongside your existing system.
This "parallel lithium" approach gives you the benefits of LiFePO₄ — faster charging, deep cycling, and stable voltage — without disturbing your current house bank or replacing your main charging infrastructure.
Why a Small Lithium Bank Works So Well
A compact lithium bank — usually just two or three Fogstar LiFePO₄ batteries — provides a highly capable energy reservoir for daily loads. You keep your traditional house bank in place, and the lithium sits alongside it as an additional, high-performance source of power.
Fogstar lithium batteries offer a simple way to add LiFePO₄ storage, using Grade A EVE cells for long cycle life and dependable performance.
You gain the core advantages of lithium immediately, without the disruption of a full conversion.
How the System Is Linked
The lithium bank and your existing house bank are connected using a DC-DC charger.
This creates a controlled pathway that:
keeps the two banks electrically separate
manages voltage correctly
ensures each bank receives the right charge profile
A Cristec DC-DC charger is typically used for this, acting as a safe, regulated link between the two systems.
Charging the Lithium Bank
One of the biggest advantages of this approach is flexibility. The lithium bank can be charged from the equipment you already have onboard:
Solar
Alternator (via a Cristec RCB+ battery relay)
There's no need to redesign your charging system — you simply feed energy into the lithium bank in whichever ways make sense for your style of sailing.
Why Start Small Instead of Converting Everything?
A "parallel" lithium setup has some clear benefits:
Minimal disruption — your existing electrical system stays in place
Immediate improvements in usable capacity and charging efficiency
Simpler to understand and manage
Easy to expand later
It lets you experience lithium on your own terms: a controlled, low-risk first step with a clear upgrade path.
Ready to Explore a Small Lithium Setup?
If you're considering adding a Fogstar lithium bank or pairing it with the right Cristec charging equipment, we're always available to advise on layouts, sizing, and integration options.
