You are in NZ right?
At this time of year using 400 watts and a PWM controller, assuming you have clear view horizon with no shade issues, and optimum tilt/orientation angles with 5 Sun Hours should be around 1 Kwh per day. Just by changing to MPPT up to 1.5 Kwh. A 24 volt 200 AH battery is capable of 1 Kwh per day so your panel wattage to battery ratio is right.
What we do not know is how much you are trying to use. If 1 Kwh or less no problem. Over 1 Kwh and you are in Deficit.
At this time of year using 400 watts and a PWM controller, assuming you have clear view horizon with no shade issues, and optimum tilt/orientation angles with 5 Sun Hours should be around 1 Kwh per day. Just by changing to MPPT up to 1.5 Kwh. A 24 volt 200 AH battery is capable of 1 Kwh per day so your panel wattage to battery ratio is right.
What we do not know is how much you are trying to use. If 1 Kwh or less no problem. Over 1 Kwh and you are in Deficit.
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