I was looking to see if the Cyrix could be controlled via its relay attached to eg BVM/CGX/Quattro as a controlled dual battery system ?
combine lead acid (large aged bank 48v 1320ah) with lithium (2 x 48v 100ah), to help the lead acid last a longer and not over charge/ over drain the lithiums.
(Lithiums were purchased as lead acid battery posts have a large amount of corrosion internally and may keep going for a while longer if high current loads can be "softened"). when one or more cells do fail, then they will be used as replacement.
looking to connect the lithium batteries in parallel to main bank when voltage is greater than 49 and less than ~56.