Sizing Tool
BatteryAdvisor
Match your system voltage to the right chemistry — and the electrical support your build actually needs. Enter your amplifier load, pick your charging voltage, and we’ll size the bank.
Step 01
How much power are you really running?
Enter RMS power per amplifier — not peak, not “max” off the box.
Total RMS load 0 W
Step 02
Electrical system
The voltage ladder
Chemistry follows voltage.
Every chemistry has a window it lives in. Charge above its ceiling and you damage it; charge below its floor and you never see rated output. Find your charging voltage on the scale, then read across.
12.5V14V15.5V17V
Your system
Side by side
The chemistries.
| KILO HP · Sodium Ion | AE · LTO Lithium | AE LV · LiFePO4 | THE DON · NMC | |
|---|---|---|---|---|
| Charging window | 13.8 – 15.5V | 15.2 – 16.2V | 12.8 – 14.6V | 14.8 – 16.6V |
| Hard limit | 15.5V | 16.2V | 14.6V | 16.6V |
| Nominal | — | — | — | 15.3V |
| Discharge | 17C constant · 20C burst | 50C constant · 75C burst | 700A per string, load-tested | 24C constant · 40C pulse |
| Cycle life | 1,500+ (to 70%) | 40,000+ | 2,000 – 5,000+ | NMC typical |
| Sizes | 40 / 80 / 200 Ah | 15 / 30 / 45 Ah | 20 / 40 / 80 / 160 Ah | 55 / 110 / 220 Ah |
| Best for | The everyday sweet spot | Boosted, hard-hitting SPL | Stock-voltage daily systems | Maximum power at 15.5V+ |
| Needs | Nothing special | 15.2V minimum | Stock alternator fine | Serious charging voltage |
| Temp range | 14 – 140°F | Wide | Moderate | Moderate |
| Status | Built to order Ships ~10 weeks after order · cells land October 10 |
Built to order About 1 week · AE45 is a limited run of 4 |
Pre-order First run lands end of 2026 |
Coming soon End of 2026 |
Already own a pack?
Charging rules, by model.