msmith1199 wrote:
What is the advantage to them over Lithium? Is it just cost? Do they provide as much power?
As far as power goes 100 amp-hours is 100 amp-hours. However SiO2 may do larger discharge rates than LI. LI appear to be limited to about 1 C.
Similar to LI in that partial charging is just fine--though best practise is to do a full charge on a monthly basis.
advantages
1. can be used and charged at -40
2. can be run stone bone dead 620 times
3. can do 50% discharge 2800 times
4. no need to stop charging at 90% which LI prefer (for storage)
5. can do 80% discharge 1500 times
disadvantages:
1. heavier and larger foot print than Li
2. charge rate 4/c however if one has 300 amp-hours that hardly matters as converter size may not be able to get to 75 amps--without upgrading.