Poly vs Mono Solar Panels?

Question:

I am looking to buy solar panels and leaning toward a pair of the SP-112Q-JB. However, can you explain the difference between those and the “standard-output cells” equivalent size panels SL90Q-JB. In my Catalina 400 with the fridge and freezer (I don’t run it super cold) I burn through about 120-160 Ahrs in 24 hours. My house bank is 6 X T105 Trojan’s with a total capacity of 630 amps of which I’m assuming a maximum draw of approximately 300amps – my starting batteries are a pair of 4D’s which is only draw to stretch out that extra night if needed.

Answer:

The difference between the SP112Q and the SL90Q is wattage. The SP model offer more wattage per are then the SL model. Our own daily Amp-hour usage is very similar to yours. We use about 150 AHrs of power a day. In order to provide as much power as possible, we opted to install the SP model instead of the SL. If possible, try to fit 3 panels at 112 Watts. This will provide you with a 336 watt solar array. From this you can expect 65 to 100 AHr of daily output on a sunny day.

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