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Rolls Batteries
Surrette Batteries
(same company - 2 names)
Industrial quality available in a wide range of
configurations. 5000 series is excellent for larger systems because
multiple strings can be eliminated. Generally the fewer strings
the better, so larger systems should use cells with more amp-hours.
All Rolls/Surrette are eligible for free
shipping on large quantities direct from Surrette in Nova Scotia.
Batteries also may be picked up in Colorado. Occasionally there are
lead times on Surrette. Clicking on the model numbers will take you to current catalog page at the Solar Panel Store.
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| S-460 |
4000 series is a "forklift" or "floor
scrubber" type with higher capacities available and better
warranty than the competition. 7 year limited warranty. Rated
for 1,973 cycles at 20% depth of discharge. 1,280 cycles at 50%.
Capacities are listed at 100 Hr. rate.
5000 series is no-compromise solution for extended
use. Dual container construction, 10 year limited warranty. Rated
for 5000 cycles at 20% depth of discharge. 3300 cycles at 50%. Capacities
are listed at 100 Hr. rate.
Complete specs and warranty information are available
at the
Rolls
website
(close window to return to CSE)
Battery life is dependent on their care and feeding.
Any warranty claims will require documentation of usage and maintenance.
If maintained properly (charged to full regularly and properly,
water level maintained) the warranty shouldn't be an issue. Note that batteries should not be allowed to sit in
a discharged state for any length of time. We have seen brand new batteries totally ruined by sitting unused for one year.
Modern
charge controllers do a great job and a good charge controller is
an investment in the life of the batteries as well.
State of Charge is best measured using a specific gravity-based battery tester. These have a glass pipette
with a calibrated float to measure the density of the electrolyte. Voltage can be used as a rough indication of the charge state but only if the batteries are not being charged or loaded at the time. An amp-hour gauge is a good way to keep track of the current going into
and out of the batteries and can display state of charge information quite accurately. The well known brand of amp-hour gauge is
the TriMetric. The leading charge controller manufacturers are soon going to add this functionality to solar charge controllers
which will be a nice advancement for off-the-grid battery / solar systems.
POLICIES
All
items are new with full manufacturers warranties, unless otherwise
noted. CSE guarantees all items to be as advertised, subject to
typographic errors. Any item may be returned for a refund within
30 days. Returns require return authorization from CSE. Returns
may be subject to a 15% restocking fee. Shipping charges are not
refundable.
Any back-ordered items may be cancelled at any time before shipping
for full credit.
Colorado residents add 2.9% sales tax.
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