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Strategies & Market Trends : 2026 TeoTwawKi ... 2032 Darkest Interregnum -- Ignore unavailable to you. Want to Upgrade?

To: Elroy Jetson who wrote (129900)	2/7/2017 1:10:56 AM
From: Haim R. Branisteanu	Read Replies (1) \| Respond to of 218700

Flow batteries are around for a while, the main problem is they are big, need maintenance, the pumps on each side lower efficiency and the membrane/separator needs periodical cleaning. Aside they are physically big / kwh and most use electrolytes that are very poisonous. Their great advantage is that theoretically they do not wear down by charging and discharging and most are not flammable, except those using hydrogen instead of liquid electrolyte The newer non-flow batteries are cheaper to operated and do perform up to 10,000 cycles but the charge stored goes down to up to 70% of the initial capacity and are sensitive to overcharging and temperature I summary there is not one type of battery suitable for all needs, and charge discharge efficiency is utmost important for utility size storage needs, therefore choosing the right battery for the task needs knowledge Lithium Ion are best where weight is a factor, the amount of lithium is relatively small. Tesla approach of many small units is far from ideal, as the packaging increases weight a lot.