Vectis.ai example
Solar MPPT Charger
6–18V solar to LiPo MPPT, USB-C 5V out
About this design
A solar MPPT (maximum power point tracking) battery charger accepting 6–18V panels and producing a regulated 5V USB-C output, with 1S LiPo intermediate storage. Implements perturb-and-observe MPPT in firmware on a low-power MCU.
Typical applications
Off-grid IoT power supplies, camping and portable solar kits, rural sensor networks, low-cost emergency lighting. Pairs well with the LoRa tracker for fully autonomous remote nodes.
Compliance scope
LVD, EN 55032, EN 61000-4-2/4/5, IEC 62133 for the LiPo cell.
Design at a glance
- Bill-of-materials cost: €3.99
- Active power consumption: 0.6 mW
- Components selected: 9
- BOM lines: 9
Bill of materials (preview)
| Ref | Part | Manufacturer | Description |
|---|---|---|---|
| mcu-stm32l412c8u6 | STM32L412C8U6 | STMicroelectronics | STM32L412C8U6 |
| sensor-shtc3 | SHTC3-TR-10KS | Sensirion | SHTC3 Temp/Humidity Sensor |
| pwr-buck-ap3012 | AP3012KTR-G1 | Diodes Inc | AP3012 |
| cap_100nf_mlcc_00 | N/A | Murata | 100nF MLCC X7R decoupling cap 0402 |
| cap_100nf_mlcc_01 | N/A | Murata | 100nF MLCC X7R decoupling cap 0402 |
| cap_10uf_bulk | N/A | TDK | 10µF X5R bulk decoupling cap 0805 |
| tvs_esd5z5_diode | N/A | ON Semiconductor | ESD5Z5.0T1G TVS ESD protection diode |
| esd-usb-tvs | PRTR5V0U2X,215 | NXP | PRTR5V0U2X USB ESD |
| esd-pwr-tvs | SMAJ5.0A | Vishay | SMAJ5.0A Power Rail TVS |
Make it your own
Adjust the spec, swap components, re-run compliance. Your design, fully editable.