CarGuard

Basically looking at feeding the UPS with an Inverter, only when there is no Eskom Power. My Current UPS is an Online UPS (APC 2200i) - the plan is to feed it with an Inverter and battery bank only when Eskom is down. So the Inverter will not be in battery charging mode The only charger working will be the UPS in that it will be getting power from the Inverter (With Eskom Down). See PDF attached to my original Post

Want to Achieve a Longer runtime on Home Office. Using an APC 2200va (2,2Kva) UPS which gives me about an hour runtime with current Load. (Current Load is 2 x HP mini Servers, A PC, Laptop, Screens and networking kit – routers, Fiber CPE, etc etc) Is it Possible to have a “Power Cart” (Battery Bank and Inverter) during a Power Outage powering the APC. In effect the APC will be seeing the equivalent of Eskom/Wall power during outage from Power Cart. – Looking at using an Inverter that does not have an integrated charging circuit. So on Eskom outage, wheel power cart to Office and disconnect UPS from wall and connect to Power Cart. – Due to APC one hour runtime on batteries, load will not see a disruption Reason for looking at doing this. Have periods of unreliable power on Eskom line – Lights will flicker, TV restart etc etc, but UPS keeps PC’s Stable – i.e. want to keep UPS to protect Load. (It is an “önline” APC UPS) When no Eskom outage power cart then connected to separate charging circuit in garage using a charge controller etc. Taking this approach, a modified sine wave inverter should be sufficient, keeping costs down, allowing for funds to be spent on Batteries. My thinking is that 4 x 102AH deep cycle batteries with a 24v 3KVA Inverter will give me an 8 hour runtime at least. I would also imagine that the Inverter kva spec should be higher that the UPS kva spec Your thoughts, is this doable – is there any theoretical/Electrical reasons why it will not work. Power-Cart-Concept.pdf