PRACTICAL GUIDE · BATTERIES
Choosing a lithium battery is not only a matter of capacity.
The right choice depends first and foremost on how you will actually use it.
A battery perfectly suited to an RV may be inappropriate for a home. A battery ideal for a cabin may be too heavy or too expensive for a camper van.
This guide helps you make the right choice for your situation.
Before comparing models, focus on these points.
| Criterion | Why it matters |
|---|---|
| Capacity (kWh or Ah) | Determines how much energy you can store |
| Usable energy | Some batteries should not be discharged to 100% |
| Weight and volume | Critical for RVs and camper vans |
| Voltage (12 V, 24 V, 48 V) | Must be compatible with your system |
| Self-heating | Very important in cold climates, especially in Quebec |
| Cycle life | Indicates real service life |
| Compatibility | Communication with the inverter or controller, such as Victron |
| Scalability | Ability to add more batteries later |
The right architecture changes with the context.
HOME
Store surplus solar energy and gain autonomy, especially in the evening or during an outage.
Weight and extreme compactness.
Poor sizing is the most common mistake. Too small means insufficient autonomy; too large means unnecessary investment.
OFF-GRID
Power the cabin for several days without the grid, often intermittently.
Solar production drops sharply in winter. A battery alone is not enough if generation is too low: consider the complete system—panels, battery and, when needed, a generator.
MOBILE · 12 V
Have energy for a few days of autonomy while travelling, using as little weight and space as possible.
Very high capacity, which is often unnecessary and too heavy.
Weight is critical. Every kilogram matters. An oversized battery can burden the vehicle or trailer and increase fuel consumption.
| Voltage | Ideal for | Advantages | Disadvantages |
|---|---|---|---|
| 12 V | RVs, camper vans and small systems | Simple and compatible with many devices | Higher current and thicker cables |
| 24 V | Medium stationary systems | A good balance of current and simplicity | Less common than 12 V and 48 V |
| 48 V | Homes, cabins and large systems | Better efficiency and smaller cables | Less suited to small mobile systems |
In Quebec, yes—it is often a real advantage.
Lithium batteries lose capacity, and their management system may block charging in very cold weather.
For mobile use or a cabin that is not continuously heated, this is an important criterion.
A cheaper battery may cost more over the long term.
An oversized battery is expensive, heavy and often underused.
Not all batteries communicate correctly with every inverter.
In Quebec, this is a determining factor.
Being able to add capacity later is often a real advantage.
SELECTION CRITERIA
The goal is not to identify a universal “best battery,” but the option best suited to the context.
NEED CLEAR DIRECTION
Describe your use and constraints. The criteria help identify the battery types most relevant to your situation.