Reasons for high failure rate of energy storage system

What Are The Reasons For The Failure Of Energy Storage Businesses?Inadequate Market Demand Analysis . Insufficient Funding/Capital Resources . Technological Limitations/Reliability Issues . Regulatory Hurdles and Policy Uncertainties . Lack of Strategic Partnerships . High Manufacturing/Production Costs . [pdf]
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Photovoltaic panels have high current but generate electricity very slowly

If your panels aren't producing any electricity when you'd expect them to, it's most likely a fault with the inverter or problem with the wiring. Occasionally the generation meter might fail. [pdf]
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Requirements for drilling holes for photovoltaic panels installed on roofs

no higher than four metres;at least 5m from boundaries;size of array is limited to 9m 2 or 3m wide and 3m deep;should not be installed within boundary of a listed building;in the case of land in a conservation area or in a World Heritage Site it should not be visible from the highway;only one standalone solar installation is permitted. [pdf]