These are the eight added panels, bringing me up to twenty-four and a supposed 5040 watts.
I say supposed because to date they're running a bit lower power-wise compared to the other sixteen panels. I thought at first it might just be that they have more connections and longer wire runs, but two of the other sets have just as many if not more wire/connections to push power through.
(When I started this experiment I had eight pairs of two panels - which were then ganged into four sets of four. Rather than run still more wires down I combined two sets of pairs into two quads, freeing up two sets of wires for the new panels. Down below only two pairs get ganged together as the other four come down from the roof as quads.)
And you can see the shadow of the small tree that will soon get 'topped' so it doesn't shadow my panels as the sun goes south for the winter! (And behind it two houses down is a huge pecan tree that shadows my roof the first hours of the mornings ...)
I say supposed because to date they're running a bit lower power-wise compared to the other sixteen panels. I thought at first it might just be that they have more connections and longer wire runs, but two of the other sets have just as many if not more wire/connections to push power through.
(When I started this experiment I had eight pairs of two panels - which were then ganged into four sets of four. Rather than run still more wires down I combined two sets of pairs into two quads, freeing up two sets of wires for the new panels. Down below only two pairs get ganged together as the other four come down from the roof as quads.)
And you can see the shadow of the small tree that will soon get 'topped' so it doesn't shadow my panels as the sun goes south for the winter! (And behind it two houses down is a huge pecan tree that shadows my roof the first hours of the mornings ...)
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In a 48 volt setup the max input is 150 volts - however the meters I'm using to watch each panel set are limited to 100 volts. In theory I could add a fifth panel to each set, but placing them without moving those already in place will be a nightmare ...
To be honest I'm wondering if this batch of panels (from the same company) just aren't as good as the ones I got before. The solar controller needs a high enough voltage difference between the panels and battery to charge. The first set I could set out one panel and charge a battery, while the newer ones are just under the needed voltage (using the same test rig I used the first time) so I had run two panels in series. The wattage in looked close to the first set when I had run them in pairs so I hadn't worried about it.
Time will tell ...
To be honest I'm wondering if this batch of panels (from the same company) just aren't as good as the ones I got before. The solar controller needs a high enough voltage difference between the panels and battery to charge. The first set I could set out one panel and charge a battery, while the newer ones are just under the needed voltage (using the same test rig I used the first time) so I had run two panels in series. The wattage in looked close to the first set when I had run them in pairs so I hadn't worried about it.
Time will tell ...
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