House/solar battery opinions
My current battery space is 20"L x 14"w x 10"H Going solar, and want to packs as much AH in there as I can (reasonably). Currently looking at 250 - 300. Price is not THE deciding factor, unless ...
Forum Discussion
seraphim wrote:Mixing panels can bring problems. Let's strive to keep a single 24V panel type.
Same manufacture, same voltage - what type of problems?
Same Voltage, different Imp, can be put in parallel.
Different Voltage, same Imp, can be put in series.
With 4 x 100W and 2 x 150W, your only choice is all in parallel at 24V.
Some like to use series which could use 2 for 48V, 3 for 72V, etc. The MPPT 45 and 60 can take up to 4 24V in series. While you can place all 6 in parallel, you need to be sure you want 24V wiring.
The main reason for higher Volts/series, is that it allows for smaller wire to the controller. Smaller wire is cheaper, plus easier to route because it is more flexible. Is it possible that 6 x 100 would be workable. This could be wired at 36V by placing 3 in series for two arrays of 36V, then these two could be wired in parallel to double tha Amps. You would get the same total Watts.
Another advantage is that you could also decide on 8 x 100W in a 48V setup and the MPPT 60 controller.
I just wanted you to know the options.
HTH;
John
