What is included in the base kit?

Four 100W rigid panels (or two 200W panels), a charge controller, and the cables, connectors, mounts and monitoring needed to link the main parts. Batteries and an inverter are only included if you select them.

Should I pick the MPPT or the PWM controller?

MPPT harvests more power, especially in cold or cloudy conditions, and is the better match for a 400W array. PWM is simpler and cheaper but wastes more of the panel output.

Can I add batteries and an inverter later?

Yes. The kit is modular, and the optional 2000W pure sine wave inverter or inverter charger and 100Ah lithium batteries can be added to the same 12V system.

How much power will it actually produce?

Expect well under 400W in real use. Output tracks peak sun hours, roughly 5 to 6 on a good day, minus losses from wiring, heat and controller efficiency.

Do I need to wire the panels in series or parallel?

This kit is set up for parallel wiring at 12V, which keeps the controller input voltage low and suits 12V batteries. Parallel wiring also limits losses when one panel is shaded.