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Solar charge controller

Solar & inverters · PWM / MPPT

EPEVER Tracer 3210AN · MPPT 30 A · 12/24 V auto · PV max 100 V Voc · load output 30 A · LiFePO4 (LFP4S)

Solar charge controller on the simulator's bench

Try it on the benchThe lab drops it on an empty bench and opens its datasheet card.

Typical part: Solar charge controller (EPEVER, Renogy, Victron models)

Pins

Ratings and limits

Battery12 / 24 V, auto-detect at power-up (battery range 8–32 V)
Rated charge current30 A
Max PV open-circuit voltage100 V at minimum temperature (92 V at 25 °C)
Rated charging power390 W @ 12 V, 780 W @ 24 V
Start-upMPP range Vbat + 2 V to 72 V
Load output30 A, LVD / LVR per battery setting, overload cut-off with retries
Self-consumption8 mA @ 12 V, 5 mA @ 24 V
Peak efficiency98 %
Reverse polarityPV: blocked, no damage. Battery: survived only with PV disconnected
COM port (EPEVER)RS-485 Modbus RTU, 115200 8N1, slave id 1 by default. Input registers 0x3100 PV V, 0x3101 PV A, 0x3104 battery V, 0x3105 charge A, 0x310C/0x310D load V/A, 0x311A SoC %, 0x3200 battery status; holding 0x9000–0x900E battery settings; coil 0x0002 load on/off

How to use it

Connect the battery first (it powers the controller and sets the system voltage), then the PV; disconnect in reverse. Fuse the battery cable close to the battery. Size the string so its cold Voc stays under the PV maximum — panels in series add their Voc. MPPT controllers convert a high string voltage down to battery voltage; PWM ones need panels matched to the battery (36-cell for 12 V).

Lessons and builds that use it

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