# Theoretical series hybrid EV **URL:** \ **Category:** Conversion Kits\ **Created:** [January 9, 2011, 6:01pm UTC](https://community.electricforum.com/t/theoretical-series-hybrid-ev/1547 "2011-01-09T18:01:45Z")\ **Posts on this page:** 1\ **Page:** 1
**Author:** ![muffildy](https://avatars.discourse-cdn.com/v4/letter/m/e8c25b/32.png) [@muffildy](https://community.electricforum.com/u/muffildy)\ **Post date:** [January 9, 2011, 6:01pm UTC](https://community.electricforum.com/t/theoretical-series-hybrid-ev/1547/1 "2011-01-09T18:01:45Z")
Okay so let me see if ive got the theoretical total picture. 1 gal = 36 kwh Most diesel generators run at 33% efficientcy and depending on their load they draw fuel eg .25 gal at .25 load. So a 12 kwh generator draws 1 gal per hour. A 20 kwh generator with a 12 kwh load would also draw 1 gal per hour though or atleast thats what this implies. Or does it work by you telling it what load to use and then it produces a set amount of kwh? If thats how it works then batteries would be needed to store extra power difference between set load and actual load. Now it takes 10 hp x 750w or 7.5 kwh to go 50 mph So now the AC generator to AC capacitors to AC motor setup would lose 25% of its energy and an unknown amount gained back through regenerative breaking. So 7.5 x 1.25 = 9.375 kwh to go 50 mph That would be a drain of .79 gal per hour So 50 miles per .79 gal or 63 miles per gallon at 50 mph To go 65 mph i would need 18.38 HP 18.38 hp x 750w = 13.785 kwh So 13.785 kwh x 1.25 = 17.23 kwh at 65 mph that would be a drain of 1.45 gal per hour; That would be a drain in excess of what that generator can produce by 5.23 kwh so either get a bigger generator or use batteries. A bigger generator seems to not change a huge amount for the weight - a 10 kwh gen is 500 pounds, while a 20 kwh gen is 700 pounds. so 200# of batteries gets me 16 wh per pound or 3.2 kwh. So, pound for pound it looks like just using a 20 kwh generator gets me more kwh than batteries do. Of course theres the tradeoff of not being able to make it a plug in hybrid. Anyhow, thats 65 miles per per 1.45 gal or 44.82 miles per gallon at 65 mph.