I have a 200 AH CALB LiFePO4 battery that my boss gave me when he swapped out the batteries in his RV. Small, light, perfect for solar. It charges from 3 100 watt panels during the summer, and from a manually controlled MFJ-4230DMP power supply during the winter. For failsafe, I have a 15 amp switching supply under the table set for 12.4 volts to prevent over discharge. They have an interesting charge/discharge curve - charging voltage takes off over 13.4 volts, is nearly flat discharging from 13.2 volts down to 12.8, and then drops like a rock. Full discharge is somewhere around 11 volts, but that's way too low and I never risk it. I run everything on it - routers, webcams, TV, radios, chargers - except for the solid state KW amp, the tube radio, and the 24VDC UPS.