However, this is not an optimal solution since manual intervention is required when the batteries become overly discharged and the sun is not shining. (See our article Dual Powered Lighting Circuit), or replacing the light bulbs and fittings with low voltage equivalents. One way would be to separate the chosen lighting circuit completely from the mains power supply, connecting it directly to a suitable power inverter in turn connected to the renewable system battery bank. Therefore, if a microgenerator with let’s say one 150 Watt solar panel and battery backup wants to power a lighting circuit in their home, they will need to look for alternative means to achieve their goal. Unfortunately the cost of grid tie inverters with UK G83 approval (and professional installation) puts them well outside the price range of most small to medium microgenerators.
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