News · Technical
Hybrid or grid-tie — which inverter should you pick?
The difference comes down to one thing: whether the system stores power. That changes both cost and daily use.
News · Technical
The difference comes down to one thing: whether the system stores power. That changes both cost and daily use.
The first decision most customers face is whether to buy a hybrid or grid-tie inverter. The two look similar from the outside but differ noticeably in price. The underlying difference comes down to one thing: whether there is anywhere to store the power.
Panels produce direct current; the appliances in your home run on alternating current. The inverter converts between the two. It is also the brain that decides where the power just generated goes: used now, pushed to the grid, or charged into a battery.
A grid-tie inverter converts the power from the panels and feeds it straight into the house wiring. You use what you need and any surplus goes to the grid.
The advantages are fewer components, lower cost, faster installation, and no battery to replace years down the line. The drawback catches many people out: if the grid goes down, the system stops too, even in full midday sun. That is a safety rule — the inverter must disconnect so that linesmen repairing the network are not shocked by power fed back into it.
A hybrid inverter does everything a grid-tie one does, and can also charge and discharge a storage battery. Surplus daytime power charges the battery and you draw it back in the evening. When the grid fails the system keeps running whatever loads you have wired to the priority circuit.
In exchange it costs more because of the battery, installation is more involved, and after a number of years the battery will need replacing. The battery is the most expensive part of any system with storage.
Beyond hybrid versus grid-tie, when comparing two specific models look at:
The inverter table on the home page lists all of these columns for all 44 models and filters by hybrid or grid-tie and by capacity group. If you have no idea where to start, the three-question filter above the table narrows it to a handful of models.
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