Depends on:
1) Local codes, some areas may not allow Al.
2) The insulation of the AL conductor (75°C or 90°C)READ T-310.16 for Ampacity. If you cant tell what type of wire it is, you should not use it.
3) If the lugs in the panel and meter are listed for AL use (probably yes, but check anyway)
...and "Nolox" is always a good idea with AL conductors and Lugs
