4.5KW 36 volt lithium ion power wall for sale $1,500.00 - Comes with 1.7KW 36 VDC to 220 VAC true sine inverter - Up/down 220 to 110 VAC converter - 10 amp adjustable Solar charger I had used this system to heat my IMEIV electric car in the winter to maintain normal summer rang during the cold winter months. In the summer it was used to power my all electric dingy. For an extra charge ($1,000) I have available the 3 hp AC converted gas to electric outboard motor (built from a 9.9 gas Suzuki or 7 hp Honda) with matching AC control system.