Small solar set up for TT.
Got home with a used 2006 Nash 26X TT that I bought a little while ago. I want to put some solar on it, but not get carried away at this time. There's a chance I may not keep this trailer so I don't ...
Forum Discussion
Hi Mike,
If there is room to add a panel that is certainly the way to go. If there is not room then MPPT may garner an extra 8%. On a 600 watt system that amounts to about 48 watts. 48 watts x 5 hours =~ 240 watt-hour per day. Four days and you have about an extra KWH to use.
When I planned my system panels cost $5.50 per watt, so at that time MPPT made good sense. Now with panels sometimes as low as $0.26 per watt, the only time is where there is simply no more roof real estate to fill.
If there is room to add a panel that is certainly the way to go. If there is not room then MPPT may garner an extra 8%. On a 600 watt system that amounts to about 48 watts. 48 watts x 5 hours =~ 240 watt-hour per day. Four days and you have about an extra KWH to use.
When I planned my system panels cost $5.50 per watt, so at that time MPPT made good sense. Now with panels sometimes as low as $0.26 per watt, the only time is where there is simply no more roof real estate to fill.
mike-s wrote:pianotuna wrote:How much more roof space? Show your math, because I suspect for the difference in cost between PWM and MPPT, you can get more return from adding another panel.
One difference is that if you have no more roof space MPPT may allow you to harvest about 8% more.
The difference in price between a Morningstar PS-30M (PWM) and a TS-MPPT-30 (MPPT) is about $200. That will easily pay for a 100W panel. So, you'd have to have over 1000 W in panels for an 8% savings to pay off.
