The only other alternative is to run wires from the battery to the panel – but make sure that the cables aren’t cut when you close the bonnet and that the door seals won’t leak if you’ve got wires against them. If the power is cut off from the socket, then you can use the on-board diagnostics (OBD) data port fitted to most cars in the past 20 years. Be warned though – some models have a delay, so also check if the power is still there once you’ve locked the car. You can check this by plugging in a powered device and turning the car off. If you want to keep the panel and wiring inside the car you’ll need to make sure you have a 12v socket which stays live even after the ignition is switched off.
Top tipsīefore you buy a solar charger, work out what is the best for your situation and vehicle. Finally, we took the price into account using the best online sources. We also checked to ensure that they wouldn’t actually drain the battery when it was dark. We also gave points for the ease of connection and features that ensured the battery was not overcharged. The price of these solar chargers varies hugely, so we scored them on their performance in variable light conditions by measuring the output to a partially discharged 12V car battery. Which of our eight chargers puts the others in the shade? How we tested them Place one in the windscreen and it could ensure you always have enough juice to keep your gadgets running and still churn the starter motor when you turn the key.
The solution could be to use the sun to keep your battery in tip-top condition with a solar-powered charger.
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