12V · automotive
Specifying a 4x4 pack without the usual template paragraph
People land on a 4x4 page because the last bank died early or would not charge. 4x4 auxiliary power. We start from load, charger, and temperature — then cells.
CAGE 93CZ2
UN38.3 transport docs on request. DUNS 109774429. We do not publish a star rating we cannot source.
This rail: House banks, Group 24/27/31 drop-ins, small inverters
Typical size: Typical 100–400Ah; parallel for more
What actually fails
- Starting and house loads get mixed up. A deep-cycle LiFePO4 is not a secret AGM starting battery unless we spec it that way.
How we quote it
- Say whether this is house, start, or both. The BMS and CCA story changes.
12V on this URL
Sensible up to roughly 2 kW continuous inverter load. After that, step up voltage or parallel with thicker cable.
If you delete the voltage, the 4x4 constraints above should still make sense. That is the point.
What to spec for 4x4
4x4 auxiliary power Alternator over-voltage will trip a cheap BMS. Ask about charge-voltage window before you bolt it in. Voltage overlay on this URL is only there because the equipment rail is real — delete the voltage and the duty-cycle advice should still read as a sentence. Sensible up to roughly 2 kW continuous inverter load. After that, step up voltage or parallel with thicker cable.
12V catalog SKUs
12V 100AH Lithium Ion Battery
100AH
$1,499 listed
12V 10A Lithium Battery Charger
10A
$299 listed
12 Volt Lithium Batteries
12V
$999 listed
Prices are catalog list from our product file. Custom packs are quoted.
Spec note
Alternator over-voltage will trip a cheap BMS. Ask about charge-voltage window before you bolt it in.
Questions we actually get
How do I size a 4x4 lithium bank?
Watts × hours, then divide by voltage and by 0.8 if you want 80% depth of discharge. Add the worst ambient. That beats any calculator widget.
Can I keep my existing charger?
If it can hold a lithium charge curve (higher absorb, little or no float), maybe. Send the charger model. A lead-acid-only charger is how people cook packs.
What paperwork can you send?
UN38.3 is the usual transport packet. CAGE 93CZ2 and DUNS 109774429 for government bids. Other marks depend on the SKU — we send PDFs we actually have.
Customer marks shown as published by ChargeX. Ask sales for program context; this page does not invent a contract number.