20W 12V Photonic Universe solar power kit with 5A charge controller and battery cables for a motorhome, caravan, camper, boat or any 12V system (20 watt)

Product Information

The unit continually monitors the voltage, the current (charge or discharge) and calculates the state of charge together with the time remaining to charge or discharge the battery. Description Our 12V 20-Watt Solar Panels are perfectly matched for our S5 and D5 Solar Hot Water Pumps! Optional: Enter your battery depth of discharge as a percentage. If your battery is 80% discharged, you’d enter the number 80. (If you have a lead acid battery, keep in mind that they should usually only be discharged 50%.) Divide discharged battery capacity by the battery’s rule-of-thumb charge efficiency factor (lead acid: 85%; lithium: 99%) to get the amount of energy required to fully charge the battery after factoring in losses during charging. Let’s say you’re using a lead acid battery. Energy required for full charge = 1200Wh ÷ 85% = 1412Wh

Monocrystalline Solar Panel: Monocrystalline 20W solar panels are called single crystalline silicon panels. The mono panels are more efficient than their counterparts. Their efficiency is around 19 to 20%.

Multiply solar panel wattage by rule-of-thumb charge controller efficiency (PWM: 75%; MPPT: 95%) to estimate solar output. Let’s say you’re using a 400W solar array and an MPPT charge controller. Solar output = 400W × 95% = 380W Instead, connect the battery then solar panel to a solar charge controller. Charge controllers regulate the current and voltage coming from solar panels to safely charge the battery.

Well, it would actually depend upon factors like: the type of panel selected (i.e., polycrystalline or mono-crystalline panels) and the brand of the panels. Supernova navigation lights are intended for use on vessels up to 12 metres in length. They comply with CE generic EMC standards and are waterproof to IP65 and IP67. There is no specific EU standard for LED navigation lights. Supernova lights do not have any national approvals.

What Other Portable Solar Chargers Should You Consider?

Cost-effectiveness: The 20W solar panels offer great savings on their cost. The 20 watt solar panel price is low as compared to its other higher-wattage panels.

Our charge time calculator takes into account a couple of these variables for a more precise estimate. But, alas, it can’t predict the weather…yet. How Do You Charge a Battery with a Solar Panel? To charge a battery with a solar panel, you connect both the battery and solar panel to a solar charge controller. Multiply battery voltage by battery amp hours to get battery capacity in watt hours. For example, let’s say you have a 12V 100Ah battery. Battery capacity = 12V × 100Ah = 1200Wh To make this value into the amount of power you will draw from the battery you divide by 12 (since the battery is 12v)

Frequently Asked Questions

You then need to take into acount when you plan to use it. If it is all year round then you need to make the calculation based on the winter value of 0.05ah /w/day. If only during the summer then 0.7ah/w/day. Times the necessary value by 7 to account for the full 7 days of the week. Poly-crystalline Solar Panel: A Poly-crystalline 20-watt solar panel is also referred to as a multi-crystalline solar panel. The efficiency of poly solar panels is about 16% to 17%.