![]() ![]() I don't know much about the requirements for swimming pools-but many times a pool installer will over size the pump. $1.00-$2.00+ per kWhr-rough Off-Grid solar system (inc. $0.35-$0.75 per kWhr-rough Hybrid system (GT/Off-Grid capable system) $0.10-$0.35 per kWhr-rough GT system (lower costs with gov rebates) $0.10-$0.20 per kWhr-typical utility power Roughly, the power costs are (capital costs spread over 20 years, no interest/property taxes included): ![]() And that is true if you A) get the government subsidies and have a utility that supports some version of Net Metering (and a rate plan that does not hurt the customer using GT Solar). Solar Grid Tied solar power (solar panels, GT inverter, utility power) cones the closest to being near the cost of grid power. Design the solar PV power system: Once you have done 1&2-then you can design the optimum system for your needs (Solar is not cheap).Know your Loads: Peak Watts, peak VA (i.e., power factor for motors), average Watts, Hours per day, Seasonal usage, etc.Alternatives-obviously for a pool, solar thermal pool heat is a very good place to invest-usually saves money over buying gas/electricity/etc. Conservation: Make sure that the equipment is Energy Star Rated (if applicable), the most efficient you can find, the installation/usage of the equipment is done efficiently, and that the device is not oversized for the application.In general, the recommended steps for almost any project here: Is this intended for an "off grid" swimming pool or just to save costs on power at "home"? This leads to poor system performance and reduced batetry life.Īn array with a relatively high voltage spec, on the other hand, will "leave power on the table", especially in the winter, when connected to a PWM controller.įrom a system perspective, an MPPT controller can cost less than a PWM controller because it may allow for smaller guage (cheaper) wire between the array and the controller, and, everything else being equal, it usually allows for a smaller (and therefore less costly) PV array along with related installtion hardware.Ĭan you tell us morre about your long term plans for your system? If the array voltage is too low (a real problem in the summer when high ambient temperture reduces array voltage), then the battery bank may not charge fully. However, it's missing desirable features such as DC-DC down-conversion and maximum power point tracking (MPPT), which respectiely allow for greater configuration flexibility and higher energy harvesting.Ī major challenge with PWM controllers is matching the array's voltage specs to the environment. The TriStar 45 A charge controller is a perfectly good PWM charge controller. Suggestions or ideas? Am not flush with funds after being unemployed for almost 4 years but now have a job and want to get this system hooked up and working. I have 5 80 watt GE panels (with more to follow) at this one location that I will be hooking up to the new controller, so want something that will handle them. This is the model TriStar TS-45 12/24/48/ volt charge controller. Its heading back for a refund.Īm now looking at the Morningstar 45 amp charge controller. ![]() VOM showed that it was really pumping 13.7 into the batteries but on a new controller not going to accept that. Tried a Sunforce 30 amp controller and while it worked fine, out of the box the meter on the outside started showing 13 vdc part of the time, then jumping to 20 vdc after a while, which we all know is too much. Have used the small Morningstar 6 and 10 amp controllers and while they work fine for a single panel, if I am going to run anything large this just is not going to make it. Could use some advise on a charge controller. ![]()
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