[14:42:46] [Client thread/FATAL]: Unreported exception thrown!
java.lang.ArrayIndexOutOfBoundsException: 15
        at advsolar.common.blocks.BlockAdvSolarPanel.func_149691_a(BlockAdvSolarPanel.java:161) ~[BlockAdvSolarPanel.class:?]
        at ConnectedTextures.isNeighbour(ConnectedTextures.java:774) ~[ConnectedTextures.class:?]
        at ConnectedTextures.getConnectedTextureCtm(ConnectedTextures.java:680) ~[ConnectedTextures.class:?]
        at ConnectedTextures.getConnectedTexture(ConnectedTextures.java:342) ~[ConnectedTextures.class:?]
        at ConnectedTextures.getConnectedTexture(ConnectedTextures.java:219) ~[ConnectedTextures.class:?]
        at ConnectedTextures.getConnectedTextureSingle(ConnectedTextures.java:122) ~[ConnectedTextures.class:?]
        at ConnectedTextures.getConnectedTexture(ConnectedTextures.java:80) ~[ConnectedTextures.class:?]
        at net.minecraft.client.renderer.RenderBlocks.func_147798_e(RenderBlocks.java:8440) ~[ble.class:?]
        at net.minecraft.client.renderer.RenderBlocks.func_147736_d(RenderBlocks.java:6722) ~[ble.class:?]
        at net.minecraft.client.renderer.RenderBlocks.func_147784_q(RenderBlocks.java:4705) ~[ble.class:?]
        at net.minecraft.client.renderer.RenderBlocks.func_147805_b(RenderBlocks.java:304) ~[ble.class:?]
        at net.minecraft.client.renderer.WorldRenderer.func_147892_a(WorldRenderer.java:318) ~[blg.class:?]
        at net.minecraft.client.renderer.RenderGlobal.func_72716_a(RenderGlobal.java:2227) ~[bls.class:?]
        at net.minecraft.client.renderer.EntityRenderer.func_78471_a(EntityRenderer.java:1497) ~[bll.class:?]
        at net.minecraft.client.renderer.EntityRenderer.func_78480_b(EntityRenderer.java:1299) ~[bll.class:?]
        at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:945) ~[azd.class:?]
        at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:835) [azd.class:?]
        at net.minecraft.client.main.Main.main(SourceFile:103) [Main.class:?]
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.7.0_75]
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) ~[?:1.7.0_75]
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) ~[?:1.7.0_75]
        at java.lang.reflect.Method.invoke(Unknown Source) ~[?:1.7.0_75]
        at net.minecraft.launchwrapper.Launch.launch(Launch.java:134) [launchwrapper-1.9.jar:?]
        at net.minecraft.launchwrapper.Launch.main(Launch.java:28) [launchwrapper-1.9.jar:?]

试试换一个客户端吧
只能断定是数组越界，是载入贴图的时候引起的
有没有装材质包 删除试试

解决了，3Q，删了材质就不会了