battery storage
Choose 12V, 24V, or 48V from actual load current, cable resistance, DC-device compatibility, inverter power, and expansion needs—not a one-size-fits-all wattage rule.
solar
Plan a ground-mounted PV array around site shading, seasonal energy goals, row geometry, local wind and snow loads, foundations, and the real cost of long electrical runs.
battery storage
Calculate inverter idle draw in Wh/day and kWh/month, compare ECO/search modes, and understand battery drain using transparent no-load assumptions.
battery storage
Size an inverter for compressors, pumps, and workshop motors by comparing real starting-current data, inverter surge duration, DC-bus voltage sag, and battery/BMS limits.
battery storage
Size a LiFePO4 battery bank by four separate constraints—usable energy, continuous inverter current, surge current, and manufacturer configuration limits—using a real 51.2V rack-battery example.
battery storage
Understand why a LiFePO4 BMS may stop charge or discharge, how one cell can reach a limit before pack voltage looks unusual, and how to troubleshoot without guessing at reset voltages.
battery storage
Understand why LiFePO4 charging becomes more restrictive in the cold, how lithium plating risk changes with temperature and current, and how BMS or heating strategies protect winter systems.
solar
Plan ground-mounted bifacial PV using albedo, rear-side shading, clearance tradeoffs, row geometry, and snow-season considerations.
systems
A practical blueprint for electrifying a detached garden or utility shed. Sizing an 800W solar array, 24V 100Ah LiFePO4 battery, and pure sine wave inverter for tool charging.
solar
Troubleshoot a solar array that shows plausible open-circuit voltage but little or no MPPT charging current, without relying on unsafe short-circuit tests.
wind hydro
Estimate micro-hydro watts from measured flow (GPM), net head and turbine efficiency using worked formulas, including penstock losses and seasonal flow limits.
battery storage
Size an MPPT controller with four independent checks: cold-corrected Voc, operating voltage, PV short-circuit current, and permitted array power, using one real 450W module and 250/70 controller.
systems
Follow one complete off-grid cabin reference design from daily loads through battery autonomy, inverter current, 4S2P solar topology, cold Voc, MPPT limits, and a two-day poor-weather stress test.
systems
Size off-grid refrigeration from the appliance's real daily energy use, compressor starting requirement, inverter idle loss, and the tradeoffs between AC and DC refrigerators.
solar
Understand how partial shading changes PV current, when bypass diodes conduct, why hot spots matter, and what half-cut module layouts can—and cannot—solve.
wind hydro
Estimate realistic small-wind energy from wind speed, rotor area, tower height, turbulence, and the cubic power relationship instead of relying on nameplate wattage alone.
solar
Compare 4S, 2S2P, and 4P solar wiring with one real 450W module datasheet. See how topology changes Vmp, Voc, current, cable loss, controller compatibility, and shading behavior.
remote power
Size a remote solar supply for PoE cameras using real camera power data, night-time IR or heater loads, PoE compatibility, and winter autonomy.
remote power
Plan solar power for remote radios, LTE/5G routers, and telemetry using device-specific power data, DC input limits, winter autonomy, and practical surge protection.
systems
Plan an off-grid well-pump system by checking the actual motor data, inverter surge capability, pump controls, total dynamic head, and the option of storing water instead of electrical energy.
remote power
Compare current Starlink Mini and Standard power requirements, daily energy demand, inverter overhead, snow-melt behavior, battery autonomy, and off-grid architecture choices.
systems
Plan an off-grid workshop around real tool nameplates, simultaneous motor starts, inverter surge duration, battery fault current, and split-phase load distribution.