Son in law used his meter with the big loop at the top, I was measuring volts with mine which is just a DS one but as it stands I just want them to charge the batteries, the only thing drawing off the whole system is the fridge which draws 132w when it's running so from a full charge overnight when the fridge is running less than 50% of the time the 300w of pannel should be able to replenish what's been used with a full day in the sun, the system is plugged into mains during the day and evening atm and only switched to battery overnight until 10am ish.

Solar panels were measured at the panel with nothing attached and at the battery while hooked up.

Understanding this shit is way beyond me, never dealt with it before and I've still got to install my reversing camera and two way radio.

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Beaten up old 98 Gen 2 Liberty, 13.0, stock V3 STI running gear.
07 Transit motor home
69 VF & 70 VG Valiants needing full restoration
Yamaha Zooma 50cc rocket hopefully going with the Transit.