Pylontech Battery Calculator
Best value LiFePO4 modular battery — enter daily kWh usage, backup hours, and inverter brand to get the right Pylontech model (US3000C 3.55 kWh, US5000 4.8 kWh, FORCE-L 7.1 kWh, Pelio-L 14.2 kWh), total capacity, cost ($350–500/kWh), and compatibility with Victron, Sol-Ark, Deye, and Sungrow.
| Metric | Value |
|---|---|
| Recommended model | US3000C (3.55 kWh per module) |
| Modules recommended | 1 modules |
| Total capacity | 3.5 kWh |
| Usable capacity (80% DoD) | 2.8 kWh |
| Backup duration at your load | 4.5 hours |
| Required energy (calculated) | 3.1 kWh |
| Cost range | $1,243 – $1,456 |
| Cost per kWh | $380/kWh (best value LiFePO4) |
| Cycle life | 6,000 cycles @ 25°C |
| Estimated battery lifespan | ~16 years at 1 cycle/day |
| Depth of Discharge | 80% DoD |
| Victron compatibility | Compatible via CAN/RS485 BMS |
| Model description | Entry modular — 3.55 kWh/module, up to 8 in parallel for 28.4 kWh max |
How to Use This Calculator
Enter your daily usage and backup hours
Start with your daily electricity consumption in kWh (check your utility bill) and how many hours of backup power you need. The calculator converts this to required storage capacity accounting for Pylontech's 80% depth of discharge — the safe operating limit that preserves battery life. 4 backup hours covers overnight essentials; 24 hours covers a full off-grid day.
Set module count and inverter brand
Pylontech batteries are modular — each US3000C module adds 3.55 kWh, each US5000 adds 4.8 kWh, each FORCE-L module adds 7.1 kWh, and each Pelio-L module adds 14.2 kWh. The calculator recommends the best model for your energy requirement and checks whether your inverter brand has native BMS communication support.
Read the inverter compatibility
Pylontech batteries communicate with inverters via CAN bus or RS485 for native battery management. The US5000 has the widest compatibility across Victron, Sol-Ark, Deye, Sungrow, Solis, Growatt, and SMA. The Pelio-L is newer and currently compatible with Victron, Sol-Ark, and Deye. Always verify the exact firmware revision with your installer.
The Formula
The 80% depth of discharge (DoD) is Pylontech's recommended operating limit. Cycling below 20% state of charge reduces lithium iron phosphate (LiFePO4) cycle life significantly. Pylontech's 6,000-cycle rating at 25°C assumes 80% DoD — equating to approximately 16 years at one full cycle per day. At partial cycling (common in grid-tied systems), actual lifespan can exceed 20 years.
Example
Priya — 25 kWh/day household, 12 hours backup, Victron inverter
Priya's household uses 25 kWh/day and wants to power critical loads (fridge, lights, router, fans) for 12 hours during grid outages. She has a Victron Multiplus II inverter.
Results
Priya's 3-module FORCE-L1 stack gives 16+ hours of backup — more than the 12 she needs, providing comfortable margin for cloudy days or higher-than-normal usage. The Victron Multiplus II communicates directly with Pylontech's BMS to optimize charge/discharge cycles automatically.
Pylontech Model Comparison
| Spec | US3000C | US5000 | FORCE-L1 | Pelio-L |
|---|---|---|---|---|
| kWh per module | 3.55 | 4.8 | 7.1 | 14.2 |
| Max per stack | 8 | 8 | 4 | 4 |
| Max stack kWh | 28.4 | 38.4 | 28.4 | 56.8 |
| Cycle life | 6,000 | 6,000 | 6,000 | 6,000 |
| $/kWh approx. | $380 | $400 | $420 | $450 |
FAQ
Related Calculators
Embed This Calculator
Free to embed on your website. Just copy this code:
<iframe src="https://solarsizecalculator.com/pylontech-battery-calculator"
width="100%" height="750" frameborder="0"
title="Pylontech Battery Calculator"></iframe>