Series vs parallel is the first wiring choice for any battery bank or solar array. The rule is short. Series adds voltage. Parallel adds current (amp-hours). Total energy (Wh) or power (W) is the same either way. What changes is the voltage and current your cables, charge controller and inverter have to handle. Electrical work […]
Grid-tie vs hybrid vs off-grid is the first design decision in any home solar project. It decides whether you need batteries, what happens in a blackout, and roughly what you’ll spend. Here’s how each type works and who it suits. Electrical work can be dangerous: follow the manual, fuse and size every cable correctly, and […]
NEM 3.0 is the nickname for California’s Net Billing Tariff (NBT). The California Public Utilities Commission (CPUC) adopted it on Dec 15, 2022 (Decision 22-12-056). It applies to PG&E, SCE and SDG&E customers who submitted an interconnection application on or after April 15, 2023. The utilities call it the “Solar Billing Plan.” Its main change […]
Microinverters vs string inverters is the main equipment choice on most residential solar quotes, and power optimizers sit somewhere in between. All three turn panel DC into home AC. They differ in where that conversion happens, which changes shade performance, monitoring, safety compliance and what fails over 25 years. How Each Works Microinverters vs String […]
Volts, amps and watts explained simply: volts are electrical pressure, amps are flow, and watts are the work done, and the U.S. Department of Energy defines wattage as volts times amps. This guide uses a water analogy, one formula, and examples you’ll actually run into with solar and batteries, so a battery label in amp-hours […]
A DC wire gauge chart needs two numbers for each copper size: ampacity, the current the wire can carry without overheating (NEC Table 310.16), and resistance, which sets your voltage drop (NEC Chapter 9 Table 8). The quick answer: for 30 amps DC at 3% voltage drop, a 10ft run needs 6 AWG at 12V, […]
A voltage drop calculation tells you how much voltage a wire loses between the source and the load. Lose too much and inverters shut off at low voltage, motors run hot, and chargers never finish. The math is just Ohm’s law applied to the wire, and you can do it with a calculator and one […]
Replacing an old RV converter with Victron gear is a popular upgrade, especially when you switch to lithium. Many older converters have fixed charge voltages that don’t suit LiFePO4, and they can’t run loads when shore power is gone. Victron offers two common paths: a Blue Smart IP22 charger for a simple swap, or a […]
The Victron MPPT load output lets the controller switch DC loads off before the battery is drained, then back on when it recovers. The small SmartSolar charge controllers have a third set of terminals labeled “load” for this. It’s simple, but the settings confuse people. Here’s what each mode does, which models have a physical […]
To program a Victron MultiPlus-II, you need a way to talk to its VE.Bus port and some free Victron software. Victron’s manual lists the hardware as an MK3-USB (VE.Bus to USB) interface and an RJ45 UTP cable. From there you can use the VictronConnect app or VEConfigure on a computer. Here’s what each tool does […]
