Why I made this?...
Sometimes I Got feelings like my heavy plants of Accumulators doesn't fits all of those laser turrets needs..

Solar panel:
Work's like solar panels
Outputs 1 MW.
This is exactly output to recharge the accumulator, but it work only in daylight.

Accumulator:
Capacity 1TJ (it is actually 1,000 GJ, 1,000,000 MJ, or 1,000,000,000 kJ, 1,000,000,000,000 J)
Recharge Rate is 1MW.
Discharge Rate it 1GW.
So actually you are chargin' it up for 1 milion seconds (~277 hours with mods it can be 3x faster)... but can discharge it in 1 Thousand seconds (~17 minutes, with mods it can be 3x faster).
If you stack it, it completely cover laser turret power spikes. (Got 7k Laser turret spike and it was fine, actually having 30 of them charged to 1TW - 29 TW still remain to be charged.)
Or give you a time to build new nuclear reactor pack.
Avialable from Start the game, but its not cheap...

These two things till work's like vanilla ones, can connect with everything.
the solar panel was added, because you can now separate the accumulator from your main electricity.
Perfectly work for covering the laser turrets spikes now..

(Side effect if 3 solar panels +1 accumulator can cover whole outpost needs)

Works with Angels and Bob's mods, should work with Xander mod, Omnizelos mod's, Pyanodons mod's as well.
Working with Seablock (but as well is too op for seablock marathon).
Credits...
Thanks to Bobingabout for tips.

ver.:
0.1.6 - Fixed 999kw instead 1mw ...
0.1.5 - Some fixes.
0.1.4 - Renamed and Added solar panel
before https://mods.factorio.com/mod/UltimateAccumulator