calculate and design battery packs, powerwall and solar offgrid systems

18650 battery sketch
18650 powerwall calculator

This calculator helps you to design your battery pack based on 18650 cells. After you set the the series and parallel configuration it will output the storage capacity, output power and state-of-charge voltages.

solar panel sketch
solar calculator

This calculator helps you to design your battery pack based on 18650 cells. After you set the the series and parallel configuration it will output the storage capacity, output power and state-of-charge voltages.

ebike battery
ebike battery calculator

[IN PROGRESS] Whether you're modifying your bicycle with an ebike conversion kit or replacing your old ebike battery this calculator will provide range estimation, energy capacity and output power calculation. Based on 18650 cells, it supports 24V, 36V and 48V packs.

ebike battery
scooter battery calculator

electric scooter batteries are expensive. if you're looking to create your own escooter battery pack or upgrade an existing pack then use this calculator to help you design it

18650 powerwall calculator

If you're building a powerwall using 18650 Li-Ion cells, use this tool to calculate the stored energy capacity, amount of needed cells, nominal and separate SoC (state of charge) voltages.

Pack configuration
Cells in series?
S
Cells in parallel?
P
Cell parameters
Constant current
A
Peak current
A
Avg Cell Capacity?
mAh
 More than one pack?
total energy
cells needed
mm cells width total
mm pack width total
Ah capacity
V nominal
(energy_per_pack / pack)
0 A constant
0 W constant
0 A peak
0 W peak

Powerwall calculator

This tools calculates battery pack configuration based on required power output (constant and peak power) and target energy storage capacity. If you're starting with offgrid, it is recommended to go with the 24V system as it provides the best value for money. For those on a limited budget and storage space, there's 12V option popular among #vanlife. Moving an entire house or a remote building completely off-grid should be based on 48V systems.

Configuration
Nominal Voltage
Battery Chemistry
Usable energy
Required Output
Constant power
Peak power
Cell parameters
Constant current
A
Peak current
A
Avg Cell Capacity?
mAh
configuration
watt hours nominal
cells needed
capacity
BMS

Solar panel calculator

Solar generator as a power source has been popular for quite some time and with the price drops in 2020 most people can afford this option. The ultimate solar generator would be a Tesla Solar roof however with a cost of $30k-$60k it's feasible on roofs that need replacement.

Nominal Voltage
Usable Energy?
kWH
Battery Chemistry
Avg Cell Capacity?
mAh
Max Current/cell
A
total energy(energy_per_pack / pack)
cells needed
Ah capacity
V nominal
V discharge cutoff
V charge cutoff