Application
Off-grid Solar and Backup Power
A stationary system trades mobility for scale: higher series counts, larger continuous currents, and a duty cycle that is close to continuous. The failure mode that matters is thermal, not mechanical.
This page is not finished
The engineering constraints below are written, but this page has not yet been reviewed by a technician and contains no product-specific recommendations.
Blocked by: Technical review (docs/evidence/) — see ACCEPTANCE A-09
We publish this page in its incomplete state rather than filling it with plausible-looking detail. If you need an answer now, ask us directly.
What this application demands
Each line is a constraint that can rule out a board on its own. They are listed in the order they usually eliminate options, and each one has to be checked against the manufacturer's document for the specific model.
Series count drives the whole design
System voltage determines series count, and series count determines which boards are even eligible. This must be settled before comparing current ratings.
Continuous rather than peak ratings govern
An inverter running a steady load for hours exercises the continuous path. Thermal design, terminal sizing and cable gauge become the limiting factors, not the silicon rating.
Balancing behaviour matters over months
A pack that is cycled daily drifts. Passive balancing dissipates energy as heat; active balancing moves it between cells. Which is appropriate depends on pack size, cycle depth and how often the pack reaches full charge.
Monitoring is part of the requirement
A system in a shed or a basement is not observed. The protocol the BMS speaks determines whether it can be integrated with the inverter and with whatever monitoring already exists.
Where selection goes wrong here
- Comparing boards by peak current when the load is continuous.
- Choosing an active balancer for a pack that rarely reaches full charge — balancing needs the right conditions.
- Assuming protocol compatibility from the connector type alone.
What to send for a fit check
Four items. With all four, one reply is usually enough to say whether a given board works — or which constraint rules it out.
- Cell chemistry
- LiFePO4, LTO or Li-ion — the series range differs between them.
- Series count
- How many cells in series, or the nominal pack voltage.
- Continuous load
- What the pack powers, and its rated wattage or current.
- The other end
- Inverter, charger or motor — the protocol has to match on both sides.
The same board, four different constraints
Every application page describes what the environment demands. None of them names a model — that decision belongs on the product page, with a source attached.
- RV / Campervan / Marine
In a vehicle or a boat, the load is intermittent and often inductive, the alternator is a second charging source, and the install is usually inside a confined space that nobody wants to open twice.
- Electric Mobility
Traction loads are the harshest case for current ratings: high peak, fast repetition, and vibration that works loose any connection that was not mechanically secured.
- Battery Repair / PACK
A workshop needs different things from a retail buyer: documentation at the board revision level, repeatable configuration, and a way to test a repair without risking a customer's pack.