Charging & care
Shared rules from the manuals for this range. Where a model differs — the self-cooling 300Ah uses a shorter MPPT list — the product page carries that table.
Inverter and MPPT profile
Select “12V (14.6V) Li (LiFePO4) mode”, or user mode, and enter these. Boost interval is not for lithium.
Charging
| Charging limit voltage | 14.6V |
|---|---|
| Over-voltage disconnect | 15V |
| Over-voltage reconnect | 14.2V |
| Equalize charging voltage | 14V |
| Float charging voltage | 13.8V |
| Boost charging voltage | 13.8V |
| Boost reconnect voltage | 13.2V |
Discharging
| Low-voltage disconnect | 10.8V |
|---|---|
| Low-voltage reconnect | 12.4V |
| Under-voltage warning | 11.6V |
| Under-voltage warning reconnect | 12V |
| Discharging limit voltage | 10.4V |
| Over-discharge disconnect | 10.4V |
| Over-discharge reconnect | 11.6V |
| Over-discharge delay | 0.8s |
Other
| Equalize duration | 120 min |
|---|---|
| Boost interval | Not suitable for lithium batteries |
| Boost duration | 120 min |
State of charge at rest
Approximate resting-voltage guide (not from the Vatrer manuals). Measure at the posts 15 minutes after everything is disconnected, with no current flowing.
Capacity vs voltage
| 100% | 13.5V |
|---|---|
| 99% | 13.4V |
| 90% | 13.3V |
| 70% | 13.2V |
| 40% | 13.1V |
| 30% | 13.0V |
| 20% | 12.9V |
| 10% | 12.8V |
| 1% | 10.8V (recommended low-voltage disconnect) |
| 0% | 9.5V |
Before you series or parallel
- Same capacity (Ah).
- Same brand — different BMS designs do not belong on the same bank.
- Bought close together (within about a month).
- Resting voltages matched before you tie them together.
- Do not mix these models with each other, or with another manufacturer.
- Fully charge each battery on its own.
- Join them in parallel and leave them together for 12–24 hours so the voltages settle.
- Then wire the final series, parallel, or series-parallel bank. Disconnect that temporary parallel link before you build the final bank.
Series — voltage adds, capacity stays
Four in series is the maximum suggested, for a 48V-class bank. Keep cable lengths sensible and do not mix models.
Parallel — capacity adds, voltage stays 12.8V
Up to 10 identical batteries for most models — the 200Ah and 300Ah 1500CCA allow no more than 4 in parallel. Check your model's page.
If the BMS shuts the battery off
- Remove the load. Leave the battery for 30 minutes. It often recovers, then needs a full charge.
- If the voltage is too low to accept a charge, use a LiFePO4 charger that can start from 0V.
- Or parallel a healthy 12V lithium for about a minute. A lead-acid between 12V and 14.6V can do the same job. Then fully charge.
On the 300Ah self-cooling, 460Ah and 560Ah, the power switch must be ON whenever the battery is discharging.
Storage
These packs can operate from about −20°C to 60°C. For storage, 10°C to 35°C is the ideal window in the manuals. Leave them near 50% and recharge every three months if they sit unused. Fireproof container, away from children.
Precautions
- Charge only with a LiFePO4 charger, or an inverter / MPPT set to the lithium profile in the manual.
- Do not reverse positive and negative.
- Do not short the terminals with a metal object.
- Do not immerse the battery, including in seawater. IP65 is not a licence to submerge it.
- Do not connect the battery straight to a wall socket.
- Do not strike the case or tabs with sharp metal, and do not bend the tabs.
- Keep it away from fire, heaters and children. Store in a fireproof container.
- Do not transport or store it with loose metal such as jewellery.
- Do not discard it in fire.