24VDC Power Hub 3500 Operator Manual
January 2020
|
Solar Stik
®
, Inc.
26
|
If the Power Hub is connected to the system batteries indirectly, via another power management
device such as a PRO-Verter (Figure 21) the Power Hub is no longer then primary Power
Management component. In this case, the SOC reported by the PRO-Verter supersedes the SOC
reported by the Power Hub because the energy stored in the batteries flows to the load via the
metered port of the PRO-Verter and not the metered port of the Power Hub. In this configuration,
the SOC reported by the Power Hub will report 100% when the system batteries become charged
fully; the Power Hub SOC will remain at or near 100% until the power is cycled.
NA
TO
24 VDC IN
Solar Inputs
Modem
24 VDC OUT
Expander
Pak/PRO-
Verter
ONLY
24VDC Power Hub 3500
PV Array
24VDC PRO-Verter
Figure 20. Power Hub as the primary power management device
Loads
Battery Monitor: Understanding Reported Values
The voltage and current flowing out of the Power Hub (reported in the Battery Monitor submenu) are
accurate in any System configuration. The SOC reported by the battery monitor is accurate when
both batteries and loads are connected directly to the Power Hub as shown in Figure 20.
The battery SOC is calculated based on (a) the programmed amp hour (Ah) capacity of the system
batteries and (b) measuring the amps that flow into and out of the battery over time (Ah counting).
Measuring the battery SOC requires current to move in and out through a “metered” port: into the
batteries from a charging source and out from the batteries to support loads.
Figure 21. Power Hub as the secondary power management device
NA
TO
24 VDC IN
Solar Inputs
Modem
24 VDC OUT
Expander
Pak/PRO-
Verter
ONLY
24VDC Power Hub 3500
PV Array
24VDC Li Expander Paks
Loads
24VDC PDM Plus