![]() ![]() So 180 watts per square meter of panel is about spot on. ![]() We also know that 1 square meter of sunlight (directly overhead) will produce 1000 watts of power. To help you work out how many watts your panel is actually rated to (and for a bit of trivia), we know that a decent quality panel will is around 18 per cent efficient. Instead, we’ll say you’ve bought decent panels, that have an accurate power rating on them. Solar Panels: For the incoming power, we’ll work on the idea that you’ve not bought eBay brand ‘100 million giga-watt’ panels. If you’ve got a 100Ah Lithium or a 200Ah battery bank of lead-acid batteries, just double the battery capacity. Regardless of which you use, the numbers will be the same. Alternatively, a 50Ah lithium battery, with the entire 50Ah usable. You may need to increase or lower your own information to suit your own setup, but this will get you moving in the right direction.īattery: For the battery, we’ll work on the idea that you’ve got a single 100Ah Lead Acid (AGM/Gel) deep cycle battery, which allows (about) 50Ah of usable power. With varying battery technologies and varying qualities of solar panels on the market, we’ll use a couple of constants in this article which will help to keep things simple. Hopefully, this guide will give you a solid grasp of how to work it out so you’re heading in the right direction. Now be warned, there will be maths involved here, and everyone’s setup and requirements will be different – that’s to say the examples we’ll work with may be close, but probably won’t be exactly the same as what you have or need. That said, I understand that for many of us, roof space and money to spend on solar gear is pretty tight these days, so I thought I’d walk through a couple of examples that lay out exactly how much solar you need for a given application. If you’ve seen any of my 12-volt guides over the years, you would have read that there is no such thing as too much solar. In this guide, we’ll run through how to work out exactly how much solar you’ll need to be self-sufficient in the power department in your 4X4. In this guide, we’ll run through how to work out exactly how much solar you’ll need to be self-sufficient in the power department in your 4X4. ![]()
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