By doing math, we can calculated that if the battery system is 12v, then you need a 20A Solar Charge Controller for your 200W solar panel, a mppt charge controller is always preferred. Once you've decided on the number of panels that you plan to use, you need to choose a charge controller accordingly. How does solar charge controller work and How to Size. If you have a 100W solar panel and a 12V battery bank, you will need a charge controller of 10 amps or more. This is due to the fact that a solar panel of this size can generate up to 833 watts. The maximum amps you can expect will depend on the battery voltage and the size of the charge The RV comes with the GoPower Weekender Kit. I won't be changing much there, yet. As you know. The kit includes a 190 watt panel going to a 30amp PWM charge controller located inside and under the TV. From the tongue mounted battery box to the charge controller is about 12 feet. The kit also includes a 1,000 watt inverter. A 200 watt 12V solar panel needs a 17-amp charge controller. You can get the required size for your solar panel by dividing its wattage by its voltage. A charge controller should have around 25% excess rating to handle fluctuations, so the ideal size for a 200-watt solar panel is 20 amps to allow a safety factor. The Renogy 200 W is our top pick because it will satisfy most people's needs. Because it comes with a charge controller and the necessary wiring, you can easily pair it with a Renogy battery bank. The rigid Grape Solar 200W solar panel is another reliable brand name with a great warranty. Philadelphia Solar PS-M108 (HCBF)-400W PHI400PSM108 Philadelphia Solar 400W Bifacial Half-Cell Mono Black Solar Panel. 400 W. 0.34. $135.71. Philadelphia Solar 550W Bifacial Half-Cell Mono. Philadelphia Solar PS-M144 (HCBF)-550W PHI550PSM144 Philadelphia Solar 550W Bifacial Half-Cell Mono Solar Panel. 550 W. yLBC.

what size charge controller for 200w solar panel