01/18/2017
Anonymous
Pacific Palisades, CA
We have installed several large whole house back-up battery systems utilizing GNB Absolyte Gp-100G21, VRLA, stackable deep cycle batteries and we have had no problem to date with them. If you are utilizing them as a back-up system and have the room for a battery with a low power density these are a work-horse. They need a large footing and an engine hoist to get them in place but once in they are maintenance free. We have installed them with both Outback and SMA charge controller and both work well although the easier system to install is the SMA.