One 100A Board for Three LiFePO4 Platforms
If your pack lands on one of these three LiFePO4 platforms — 16S 48V, 8S 24V, or 4S 12V — at 100A continuous, the matching is straightforward: all three fall inside the DALY Smart BMS (A Series) 100A current tier. One board covers all three voltage platforms because the A Series uses a 4–24S universal design: the BMS detects the actual cell count automatically after first power-on, within 45 seconds, with no dip switches and no manual configuration. You do not need to stock separate 4S, 8S, and 16S SKUs to serve mixed orders.
Below is the direct spec match for each platform, followed by the practical points Indian pack builders ask about most: series-count validation, temperature range, inverter communication, and parallel expansion.
Spec Match: Three Platforms, One Current Tier
| Pack Platform | LFP Series Range | Continuous / Peak | Dimensions | Balancing |
|---|---|---|---|---|
| 16S 48V 100A | 7–17S tier ✓ | 100A / 150A | 125 × 65 × 14 mm | 100mA passive |
| 8S 24V 100A | 4–8S tier ✓ | 100A / 150A | 125 × 65 × 14 mm | 100mA passive |
| 4S 12V 100A | 4–8S tier ✓ | 100A / 150A | 125 × 65 × 14 mm | 100mA passive |
The 100A tier in the A Series is the AK board. All three platforms use the same physical board, the same firmware, and the same app. Battery chemistry is switchable in the DALY app with one tap — LiFePO4 is the default, and the LFP series ranges above (4–8S and 7–17S) are what apply to these three platforms. Main-circuit internal resistance is under 20mΩ; passive balancing runs at 100±30mA on LFP cells.
16S 48V 100A — Solar and Inverter Packs
The 16S 48V platform is the workhorse for Indian rooftop solar storage and inverter-backup packs, and it sits comfortably inside the A Series 7–17S LFP tier. Three points matter for this build.
First, communication. The board ships with dual UART, CAN, and RS485 as standard — not optional add-ons. For a 48V pack that needs to report state of charge to an inverter or charge controller, you have both CAN and RS485 available on the same board, so the same pack design can serve customers on either bus without a hardware change.
Second, commissioning speed. Because series count is detected automatically at first power-on, a 16S pack goes from assembly to a live Bluetooth connection in under a minute. Your line workers scan the QR code in the DALY app, confirm 16 strings are recognized, and move on. No per-unit parameter entry.
Third, expansion. The built-in parallel module supports up to 10 packs in parallel with inrush-current protection between packs. A customer who starts with one 48V 100Ah pack can grow to a 10-pack bank later without changing the BMS.
8S 24V 100A — Confirming the 8S Boundary
Buyers sometimes hesitate on 8S because it sits at the top of the 4–8S LFP tier. To be explicit: 8S LiFePO4 is inside the supported range, not an edge case requiring special firmware. The 4–8S tier is designed to terminate at 8S, and the automatic series detection recognizes an 8S LFP pack the same way it recognizes 4S or 16S.
The other spec that matters for 24V packs in Indian deployments — telecom sites, commercial UPS replacements, agricultural equipment — is the operating temperature window: −30°C to 70°C in operation, −40°C to 85°C in storage. A 24V pack in a sealed enclosure on a Rajasthan site in May will run hot; a 70°C operating ceiling gives you real margin above ambient-plus-enclosure-rise rather than a spec that fails on paper before summer does.
The board also logs 400 history records (512KB) on-board, expandable to 4GB with optional memory — useful when a field failure claim comes in six months after shipment and you need the event history to settle it.
4S 12V 100A — Full Support, With One Cost Note
The 4S 12V platform is the entry point of the same 4–8S tier: fully supported, same board, same 100A/150A rating, same Bluetooth and communication set. For 12V packs replacing lead-acid in portable power builds, e-trikes, or RV auxiliary storage, the 4S configuration is detected automatically like any other.
Everything else in this article applies unchanged at 4S: the patented potting process (waterproof, vibration-resistant, oxidation-resistant), the sub-20mΩ main circuit, and the dedicated shutdown mode for storage and sea freight, which cuts board power draw to under 100μA so packs that sit in inventory or transit do not drain their cells.
When Active Balancing Is Worth Considering
The 100mA passive balancing on the A Series holds well-matched new cells in line. If your packs use large-capacity cells with wider consistency spread, or second-life cells where drift accumulates faster than passive balancing can correct, the T Series offers the same current tiers with 1A bidirectional transformer-based active balancing. For most new-cell builds on these three platforms, the A Series is the right starting point; move to active balancing when cell consistency, not current rating, is the constraint.
More on this decision at DALY active balancing products: https://www.dalybms.com/active-balancing-products/
Where pack current exceeds this range entirely, see the high-current BMS line: https://www.dalybms.com/high-current-bms-products/
Frequently Asked Questions
Q1Which BMS works for a 16S 48V LiFePO4 solar pack with CAN to the inverter?
The Smart BMS (A Series) 100A tier covers 16S 48V directly — 16S sits inside the 7–17S LFP range, and CAN plus RS485 ship as standard interfaces on the same board, so the pack can report state of charge to the inverter on either bus without a hardware change.
Q2Does an 8S 24V LiFePO4 pack need a special BMS or does a standard 4–8S board support it?
A standard board supports it. 8S LiFePO4 is inside the 4–8S tier — the tier is designed to terminate at 8S — and the automatic series detection recognizes an 8S pack the same way it recognizes 4S or 16S. No special firmware is involved.
Q3Is one 100A BMS model correct for both 12V and 48V LiFePO4 packs, or should 12V packs use a smaller board?
One 100A board technically covers both — the 4–24S universal design detects 4S and 16S automatically. But if the 12V application's real continuous draw is 60A or less, the 40A/60A boards in a smaller footprint are the more economical specification. Match the current tier to the actual load, not to a single-SKU default.
About DALY
DALY designs and manufactures lithium battery management systems for pack manufacturers, OEMs, and integrators, with products used in 130+ countries including active engagement with the Indian market. Founded in 2015, DALY provides pre-sale engineering confirmation and spec-matching support for production projects; the boards described here are designed to meet UL standards.
Requesting a Quote for Your LiFePO4 Pack Platform?
For a fast, accurate quotation on any of these three platforms, send three data points with your inquiry — same-day engineering confirmation is available for standard configurations, with the exact A Series match confirmed within one business day.
- Share series count and chemistry (e.g., 16S LiFePO4), nominal voltage (48V / 24V / 12V), and required continuous current
- Include the peak load if your application has one defined — the 150A peak rating is the check that matters for motor-start and inverter-surge loads
- Email: dalybms@dalyelec.com
Smart BMS product page: https://www.dalybms.com/smart-bms/
Post time: Jul-08-2026
