June 2020
|
Solar Stik
®
, Inc.
18
|
SYSTEM SETUP AND OPERATION GUDIE FOR THE 1 kW HYBRID POWER SYSTEM (HPS)
PRELIMINARY DRAFT
Qualifying AC Input Power
The PRO-Verter must only be used with AC sources that generate or provide pure sinusoidal
waveforms with voltage and frequency that meet minimum standards.
When an active AC source is connected to the PRO-Verter, it will “qualify” the power before passing
it through to the load and initiating the battery charging sequence. If the PRO-Verter detects poor
quality AC power, then the PRO-Verter may reject it and remain in invert mode.
Once AC has been accepted, it will not automatically reject the AC input power if it falters or morphs
during operation. It can, however, be programmed to reject the power of it falls below or goes over
certain thresholds, such as those programmed in the INPUT LOW and INPUT HIGH SETTINGS.
If the AC waveform itself distorts during operation, it may cause certain PRO-Verter functions to
retard (de-rate) or cease. For example, if the Field Effect Transistors (FETS) and the EMI filter are
pushed beyond their design limits by poor AC power, it may result in a Heat Sink Over Heat fault,
which will cause either retardation of charging functions or a failure to provide AC power to the load.
Charge Function
Whenever an AC power source is connected to the AC INPUT, the PRO-Verter automatically begins
monitoring for acceptable AC voltage and power quality. Once the AC voltage is accepted, the AC
transfer relay closes passing AC power to the load, and then charge function begins.
The PRO-Verter is equipped with a logic-controlled, multi-stage battery charger. It actively monitors
battery voltage and SOC, using this information to control the amount of power used to charge the
batteries in real-time. Voltage and current are independently controlled so that maximum charge
current is always applied to the batteries, reducing charging times. This maximizes the real power
available from the AC power source (grid-utility or generator), which translates into less power
wasted and less dependence on external power sources.
The automatic, multi-stage charger in the PRO-Verter provides Bulk, Absorb, Float, and “Full
Charge” stages, ensuring complete recharging and monitoring of the batteries without damage due
to over/under charging. The PRO-Verter can be programmed to charge with a “Constant Current /
Constant Voltage” (CC/CV) protocol for use with certain types of lithium batteries.
If the PRO-Verter is being operated in high-heat environments, it can “throttle-back” its charging
amperage rate to prevent overheating of the internal transformer or FET board. .
Invert Function
The PRO-Verter’s Invert function transforms DC from a connected battery into pure sine-wave AC
power for an AC load. When 24 VDC power is available from a connected battery, the PRO-Verter
automatically engages its inverter circuit functions, and AC power is immediately available for the
load. The User Interface home screen will indicate that the PRO-Verter is inverting.
When AC power is available from a grid-utility or generator source, the PRO-Verter is programmed
