Electronic Alarms and Home Security Devices - Solar security light wiring question

I hope I'm not being BAD, but I asked this question in the Lighting forum and only got 1-1/2 replies.

Because the area exposed to the sun, where I want to place the solar panel, is 40-50 feet away from the area I want to mount the security light, I need to splice 30 feet of wire in between, to add to the supplied 15 foot wire.

Can this be done without degrading the charging? If so, should I use a better gauge of wire because of the added distance?

I won't be able to return the lights to the supplier once I do a splice, so I need to get it right, the first time.

Thanks

It can't hurt to go up a gauge on the wire. If the existing wire is 16 ga, upgrade to 14. Anything that reduces your voltage drop on the wire can only help.

You aren't being _bad_, you are just voiding a warranty....

Careful on the voltage if you are going to use 110/120VAC motion detector security lights. When I bought my off-grid property, there was a Trace 1512 inverter. The docs said it should put out 120V. The day/night, motion detector Security lights didn't come on at night when I did a dance in front of them, or came on of their own accord and stayed on all day.
Electrician friend said these fixtures need at the very least 107V to work right. Meter on Trace showed 105V. Asked neighbors to meter theirs. One guy had a 1512 like mine, and another a 2512. All read 105 on the AC scale. Cause is modified SINE wave inverter. I'm told that with the "right" meter, I'd see 120V, but who cares. Need voltage that works, not one that likes the "right" meter.
Anyway - switched to outback 3524 etc and problem solved. TRUE 120V.
Also used a PPT voltage converter to maintain 13.6V DC from my 24V string to supply regulated additional power to my Vista 20P. Works great!
PM for details.