Forum Discussion
BFL13
Nov 07, 2014Explorer II
Roughly, in 25-30C, I was getting 13.5 amps with MPPT where I would have been getting 14.5 amps with PWM. At 16C I was getting 15.5 amps with the MPPT instead of the same 14.5 amps with PWM. YMMV.
That was with my 230w and Eco-W. So for the warm half of the year I would have preferred two 115w panels and my Solar30 controller and have that 14.5 amps every time.
In the cold half of the year when MPPT does better you also have shorter days, so even with an extra amp your time is less to build more AH from.
The big 230w panel is a beast to handle, but ok for a portable at our seasonal site. I would prefer two smaller panels for a portable (not hinged or it would be heavy too) if you had to move it often.
I got the 230w because it was $1/w compared with $2/w for a pair of 12s. No shipping either way (the dealer pays the shipping, but pays less than you would by buying in bulk) And then only because the required MPPT controller was only $102 (thanks to JiminDenver for the good steer on that)
I was expecting to get more like 16 amps all the time with the MPPT hype, so I was not very happy seeing that 13.5 amps. However, the year before with the two 100s (which I sold, so I was back in the market last winter) and PWM I was seeing 12.5 amps so I tried to like the 13.5.
They are all out to get you of course. :)
That was with my 230w and Eco-W. So for the warm half of the year I would have preferred two 115w panels and my Solar30 controller and have that 14.5 amps every time.
In the cold half of the year when MPPT does better you also have shorter days, so even with an extra amp your time is less to build more AH from.
The big 230w panel is a beast to handle, but ok for a portable at our seasonal site. I would prefer two smaller panels for a portable (not hinged or it would be heavy too) if you had to move it often.
I got the 230w because it was $1/w compared with $2/w for a pair of 12s. No shipping either way (the dealer pays the shipping, but pays less than you would by buying in bulk) And then only because the required MPPT controller was only $102 (thanks to JiminDenver for the good steer on that)
I was expecting to get more like 16 amps all the time with the MPPT hype, so I was not very happy seeing that 13.5 amps. However, the year before with the two 100s (which I sold, so I was back in the market last winter) and PWM I was seeing 12.5 amps so I tried to like the 13.5.
They are all out to get you of course. :)
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