SenseCAP Solar P1 voltage detection

PJ_Glasso
Thu, 02 Apr 2026 03:28:34 +0000

Hi there,

SO , may I ask have you checked them with a Meter ? each battery?
The reason is that the normal reading you see on one P1, around 4.1 V, makes sense for a single-cell 18650-based unit. Seeed’s docs for the SenseCAP Solar Node describe the P1/P1-Pro around 18650 battery usage, not a 2-cell battery system.

If the real battery voltage is normal but the firmware reports ~8 V, then I would suspect a board revision or BOM difference in the battery measurement path rather than a battery problem.

a different resistor divider / hardware revision

or firmware using the wrong ADC scaling for that unit

The fact that the bad reading is roughly double a normal cell voltage is a strong clue.

Bump,

HTH
GL PJ