Solar fuseing, confuseing
Were installing a Renogy 400 watt solar system on our fith wheel. We stay on our property about two months in the summer up near Canada in Washington.Anyway this is the kit I bought. Mind you I'm comp...
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Since that 0.9 amp advantage is apparently "worth it", it must be time to take it away! :)
That was all at 13 battery volts. How long during the day is the battery at 13v? ( less than an hour?) I find on solar it starts around there in the morning and climbs to about 14.6 just after lunch.
At 13.75 volts the 16.9 is down to 16, but the PWM is still doing nearly Isc. After that as batt v rises, they are equal or even with PWM doing more amps--depending on the scenario.
But of course by 14.6 the MPPT is now in Absorption and in PWM with amps tapering, same as the PWM with its now tapering amps, and it doesn't matter if that early 0.9a advantage is lost, because the batteries won't accept all the amps anyway, being nearly full.
Now until dark, you can use either your MPPT or PWM set-up to run some extra 12v things, since that won't interfere with battery charging. Good time to recharge your laptop. :)
That was all at 13 battery volts. How long during the day is the battery at 13v? ( less than an hour?) I find on solar it starts around there in the morning and climbs to about 14.6 just after lunch.
At 13.75 volts the 16.9 is down to 16, but the PWM is still doing nearly Isc. After that as batt v rises, they are equal or even with PWM doing more amps--depending on the scenario.
But of course by 14.6 the MPPT is now in Absorption and in PWM with amps tapering, same as the PWM with its now tapering amps, and it doesn't matter if that early 0.9a advantage is lost, because the batteries won't accept all the amps anyway, being nearly full.
Now until dark, you can use either your MPPT or PWM set-up to run some extra 12v things, since that won't interfere with battery charging. Good time to recharge your laptop. :)
