Solar charge controller selection help needed
I am looking to put in a solar system that will produce about 30 amps per day. I choose a semi-flexible 135 watt panel made by Sunpower which meets my capacity needs. My only problem is choosing t...
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Have just noticed that the OP ordered not just a 40A controller, but an MPPT one. Cost about $260.
I'm usually the one who tells not to buy el-cheapo stuff for long-term projects, but 40A MPPT for 135W single 12V panel doesn't make sense.
A good PWM controller, with remote display and temp probe, like Xantrex C35, would cost about 2 times less. And it would likely result in higher daily output as well. MPPT becomes less efficient when input voltage is getting close to 12V.
I'm usually the one who tells not to buy el-cheapo stuff for long-term projects, but 40A MPPT for 135W single 12V panel doesn't make sense.
A good PWM controller, with remote display and temp probe, like Xantrex C35, would cost about 2 times less. And it would likely result in higher daily output as well. MPPT becomes less efficient when input voltage is getting close to 12V.
